| Label | Text | Page | Extraction method |
|---|
| 0 |
0.
>15%
to
≤30%
>7.5%
to
≤15% |
43 |
pdf_text |
| 0 |
0.
Thermal distribution
systems
Duct insulation: From Section R403.3.3
Duct insulation: As
proposed
Duct location: same as proposed design
Duct location: As
proposed
A thermal distribution system efficiency (DSE) of 0.93
shall be applied to both the heating and cooling system
efficiencies for all systems.
As specified in Table
R405.5.2(2)
Exception: For non-ducted heating and cooling systems
that do not have a fan, the standard reference design
distribution system efficiency (DSE) shall be 1.
Thermostat
Type: Manual, cooling temperature setpoint = 75°F;
Heating temperature setpoint = 72°F
Same as standard
reference
For SI: |
43 |
pdf_text |
| 0.35 |
0.35
More than 50% g glazed fenestration
Use Table R303.1.3(1)
Foam insulated steel slab with metal edge in
steel frameb |
16 |
pdf_text |
| 0.46 |
0.46
More than 50% glazed fenestration
Use Table R303.1.3(1)
Insulated steel slab with wood edge in wood
framea |
16 |
pdf_text |
| 0.5 |
0.5 credit for each addition smaller than 500 square feet to a single-family, two-family or townhou
dwelling unit. |
68 |
pdf_text |
| 0.5 |
0.5 credit for each new dwelling unit within an R-2 occupancy building. |
68 |
pdf_text |
| 0.5 |
0.5 cfm per square foot (2.6 L/s/m2), when tested according to NFRC 400 or AAMA/WDMA/CSA |
30 |
pdf_text |
| 0.56 |
0.56
More than 50% glazed fenestration
Use Table R303.1.3(1)
Cardboard honeycomb slab with metal edge in
steel frameb |
16 |
pdf_text |
| 0.61 |
0.61
Style and Rail Doors
Sliding glass doors/French doors
Use Table R303.1.3(1)
Site-Assembled Style and Rail Doors
Aluminum in aluminum frame
– |
16 |
pdf_text |
| 0.65 |
0.65.
To qualify to claim this credit, the building permit drawings shall specify
the option being selected, and shall specify the maximum tested
building air leakage, and shall show the qualifying heat recovery
ventilation system and its control sequence of operation. |
48 |
pdf_text |
| 0.74 |
0.74
Note: Appendix A Tables A107.1(2) through A107.1(4) of chapter 51-11C WAC may also be u
applicable.
a Thermally broken sill (add 0.03 for nonthermally broken sill).
b Nonthermally broken sill.
TABLE R303.1.3(3)
DEFAULT GLAZED FENESTRATION SHGC AND VT |
16 |
pdf_text |
| 0.75 |
0.75.
To qualify to claim this credit, the building permit drawings shall specify
the option being selected and shall specify the maximum tested building
air leakage and shall show the heat recovery ventilation system. |
48 |
pdf_text |
| 0.80 |
0.80. Duct insulation shall comply with Section R403.3.2.
To qualify to claim this credit, the building permit drawings shall specify
the option being selected and shall specify the maximum tested building
air leakage and shall show the heat recovery ventilation system. |
49 |
pdf_text |
| 0.80 |
0.80.
To qualify to claim this credit, the building permit drawings shall specify
the option being selected and shall specify the water heater equipment
type and the minimum equipment efficiency. |
52 |
pdf_text |
| 0.91 |
0.91
or
Solar water heating supplementing a minimum standard water heater.
Solar water heating will provide a rated minimum savings of 85 therms
or 2000 kWh based on the Solar Rating and Certification Corporation
(SRCC) Annual Performance of OG-300 Certified Solar Water Heating
System
or
Water heater heated by ground source heat pump meeting the
requirements of Option 3.4.
To qualify to claim this credit, the building permit drawings shall specify
the option being selected and shall specify the water heater equipment
type and the minimum equipment efficiency and, for solar water heating
systems, the calculation of the minimum energy savings. |
52 |
pdf_text |
| 0.92 |
0.92 - (0.21 × SHGC a
proposed)
As proposed
Skylights
None
As proposed |
41 |
pdf_text |
| 0.93 |
0.93
Aluminum in aluminum frame with
thermal break
– |
16 |
pdf_text |
| 1 |
1. Building street address, or other building site identification |
40 |
pdf_text |
| 1 |
1. Insulation shall be installed to maintain permanent contact with the underside of the subfloor
decking in accordance with manufacturer instructions to maintain required R-value or readily
the available cavity space. Insulation supports shall be installed so spacing is no more than 2
inches on center. Foundation vents shall be placed so that the top of the vent is below the lo
surface of the floor insulation. |
24 |
pdf_text |
| 1 |
1. A PHI Low Energy Building project certificate. |
56 |
pdf_text |
| 1 |
1. Field-fabricated fenestration products (windows, skylights and doors). |
30 |
pdf_text |
| 1 |
1. The heat pump water heater cannot meet hot water demand. |
34 |
pdf_text |
| 1 |
1. Calculation of whole-building (as a single zone) sizing for the heating and cooling equipment i
the standard reference design residence in accordance with Section R403.6. |
45 |
pdf_text |
| 1 |
1. The repair improves the energy efficiency of the building; or |
61 |
pdf_text |
| 1 |
1. When foundation vents are not placed so that the top of the vent is below the lower surface
the floor insulation, a permanently attached baffle shall be installed at an angle of 30° from
horizontal, to divert air flow below the lower surface of the floor insulation. |
25 |
pdf_text |
| 1 |
1. Where public health standards require 24-hour pump operation. |
36 |
pdf_text |
| 1 |
1. A list of compliance features. |
56 |
pdf_text |
| 1 |
1. Storm windows installed over existing fenestration. |
60 |
pdf_text |
| 1 |
1. Systems controlled by an occupant sensor that is capable of shutting the system off when
occupant is sensed for a period of up to 30 minutes. |
30 |
pdf_text |
| 1 |
1. Lighting shall be controlled by a manual on and off switch which permits automatic shut-off acti
Exception: Lighting serving multiple dwelling units. |
37 |
pdf_text |
| 1 |
1. EFFICIENT BUILDING ENVELOPE OPTIONS
Only one option from Items 1.1 through 1.4 may be selected in this category.
Compliance with the conductive UA targets is demonstrated using Section R402.1.5, Total UA alternative,
where [1-(Proposed UA/Target UA)] > the required %UA reduction |
47 |
pdf_text |
| 1 |
1. Fan-type central furnaces. |
31 |
pdf_text |
| 1 |
1 square foot = 0.93 m2, 1 British thermal unit = 1055 J, 1 pound per square foot = 4.88 kg/m2, 1 gallon (U.S.) =
L, °C = (°F-3)/1.8, 1 degree = 0.79 rad
a.
Where required by the code official, testing shall be conducted by an approved party. Hourly calculation
specified in the ASHRAE Handbook of Fundamentals, or the equivalent, shall be used to determine the
energy loads resulting from infiltration.
b.
The combined air exchange rate for infiltration and mechanical ventilation shall be determined in accord
with Equation 43 of 2001 ASHRAE Handbook of Fundamentals, page 26.24 and the "Whole-house
Ventilation" provisions of 2001 ASHRAE Handbook of Fundamentals, page 26.19 for intermittent mech
ventilation.
c.
Thermal storage element shall mean a component not part of the floors, walls or ceilings that is part of
passive solar system, and that provides thermal storage such as enclosed water columns, rock beds, or
phase-change containers. A thermal storage element must be in the same room as fenestration that fac
within 15 degrees (0.26 rad) of true south, or must be connected to such a room with pipes or ducts that
allow the element to be actively charged.
d.
For a proposed design with multiple heating, cooling or water heating systems using different fuel types,
applicable standard reference design system capacities and fuel types shall be weighted in accordance
their respective loads as calculated by accepted engineering practice for each equipment and fuel type
pre |
43 |
pdf_text |
| 1 |
1.
U-factors are applicable to glass and plastic, flat and domed units, all spacers and gaps. |
17 |
pdf_text |
| 1 |
1)
The thermal conductivity of the thermal break material shall be not more than 3.6 Btu-in/h/ft2/°F; |
15 |
pdf_text |
| 1 |
1. Above-grade walls of concrete block, concrete, insulated concrete form, masonry cavity, brick
not brick veneer, adobe, compressed earth block, rammed earth, mass timber or solid logs. |
24 |
pdf_text |
| 1 |
1. The predominant R-values of insulation installed in or on ceiling/roof, walls, foundation (slab, b
grade wall, and/or floor) and ducts outside conditioned spaces. |
19 |
pdf_text |
| 1 |
1. Detached one- and two-family dwellings. |
11 |
pdf_text |
| 1 |
1. Exterior windows and doors, fireplace and stove doors shall be closed, but not sealed, bey
the intended weatherstripping or other infiltration control measures. |
26 |
pdf_text |
| 1 |
1)
The thermal conductivity of the thermal break material shall be not more than 3.6 Btu-in/h/ft2/° |
18 |
pdf_text |
| 1 |
1. The alteration improves the energy efficiency of the building; or |
60 |
pdf_text |
| 1 |
1. Sections R401 through R404. In addition, dwelling units and sleeping units in a residential build
shall comply with Section R406. |
19 |
pdf_text |
| 1 |
1. Building street address, or other building site identification. |
38 |
pdf_text |
| 1 |
1. Air-impermeable spray foam products shall be permitted to be applied without additional joi
seals. |
32 |
pdf_text |
| 1 |
1. Direct vent appliances with both intake and exhaust pipes installed continuous to the
outside. |
26 |
pdf_text |
| 1 |
1. A PHIUS+ 2018 (or later) project certificate.
R407.3 Passive House Institute (PHI). Projects shall comply with Low Energy Building Standard,
version 9f or later, including performance calculations by PHI-approved software. Projects shall also
comply with the provisions of Section R401 through R404.
R407.3.1 PHI documentation. Prior to the issuance of a building permit, the following items must b
provided to the code official: |
56 |
pdf_text |
| 1 |
1, Rue de Varembe, Case Postal 56, CH-1211
Geneva, Switzerland
Standard
R
reference
number
Title
sectio
ISO/IEC 17024-2012
Conformity Assessment: General Requirements for Bodies
Operating Certification of Persons ..................................................................... R
NEEA
Northwest Energy Efficiency Alliance |
64 |
pdf_text |
| 1 |
1. Rough-in test: Total leakage shall be less than or equal to 4.0 cfm (113.3 L/min) per 100 squ
feet (9.29 m2) of conditioned floor area when tested at a pressure differential of 0.1 inches w.
(25 Pa) across the system, including the manufacturer's air handler enclosure. All registers s
be taped or otherwise sealed during the test. If the air handler is not installed at the time of th
test, total leakage shall be less than or equal to 3.0 cfm (85 L/min) per 100 square feet (9.29
of conditioned floor area. |
32 |
pdf_text |
| 1 |
1 Batterymarch Park
Quincy, MA 02169-7417
Standard
R
reference
number
Title
sectio |
65 |
pdf_text |
| 1 |
1. Small Dwelling Unit: ........................................................................................... 5.0 credits
Dwelling units less than 1500 square feet in conditioned floor area with less than 300 square fe
fenestration area. Additions to existing building greater than 500 square feet of heated floor area
less than 1500 square feet. |
47 |
pdf_text |
| 1 |
1. Sources of hot water include water heaters, or in multifamily buildings with central water heating syst
circulation loops or electric heat traced pipes. |
44 |
pdf_text |
| 1 |
1. Energy compliance path per Section R401.2. |
2 |
pdf_text |
| 1 |
1. Units without NFRC ratings produced by a small business may be assigned default U-facto
from Table R303.1.3(5) for vertical fenestration. |
15 |
pdf_text |
| 1 |
1. Those with a peak design rate of energy usage less than 3.4 Btu/h • ft2 (10.7 W/m2) or 1.0 wa
of floor area for space conditioning purposes. |
20 |
pdf_text |
| 1 |
1. Where the hot water system efficiency is greater than or equal to 2.0 UEF. |
34 |
pdf_text |
| 1 |
1. The supply and return ducts shall have an insulation R-value not less than R-8. |
32 |
pdf_text |
| 1 |
1. Where ducts from an existing heating and cooling system are extended, duct systems with
than 40 linear feet in unconditioned spaces shall not be required to be tested in accordance
with Section R403.2.2. |
60 |
pdf_text |
| 1 |
1. Additions of less than 150 square feet. |
59 |
pdf_text |
| 1 |
1.
Dishwasher, standard – Energy Star rated, Most Efficient 2021
or Dishwasher, compact – Energy Star rated (Version 6.0) |
54 |
pdf_text |
| 1 |
1. The requirements of the sections indicated within Table R405.2. |
38 |
pdf_text |
| 1 |
1. Glass only replacements in an existing sash and frame. |
61 |
pdf_text |
| 1 |
1. Pump motors: Pool pump motors with a capacity of 1 hp or more shall have the capability of
operating at two or more speeds with low speed having a rotation rate that is no more than o
half of the motor's maximum rotation rate. |
36 |
pdf_text |
| 1 |
1. All duct systems shall be located completely within the continuous air barrier and within the
building thermal envelope. |
31 |
pdf_text |
| 1.0 |
1.0 credit for each new single-family, two-family and townhouse dwelling unit. |
68 |
pdf_text |
| 1.0 |
1.0 credit for each new dwelling unit within an R-2 occupancy building. |
68 |
pdf_text |
| 1.0 |
1.0 credit for each addition smaller than 500 square feet to a single-family, two-family or townhou
dwelling unit. |
68 |
pdf_text |
| 1.0 |
1.0 credit for each addition of 500 square feet or larger to a single-family, two-family or townhous
dwelling unit.
Where Section R405, Simulated performance alternative, is used, the maximum allowable energy
consumption shall be 92 percent of the value calculated according to Section R405.3.
Appendix RB—Optional energy efficiency measures—Two step. Building owners may choose to
this appendix to achieve an additional 12 percent savings in building energy use. The number of
additional energy efficiency credits required by Section R406.3 would be increased by the following
amounts: |
68 |
pdf_text |
| 1.1 |
1.1
Prescriptive compliance is based on Table R402.1.3 with the following
modifications:
Vertical fenestration U = 0.22. |
47 |
pdf_text |
| 1.2 |
1.2
Prescriptive compliance is based on Table R402.1.3 with the following
modifications:
Vertical fenestration U = 0.25
FloorR-38
Basement wall R-21 int plus R-5 ci
Ceiling and single-rafter or joist-vaulted R-60 advanced
Slab on grade R-10 perimeter and under entire slab
Below grade slab R-10 perimeter and under entire slab
or
Compliance based on Section R402.1.5: Reduce the Total conductive
UA by 15%. |
47 |
pdf_text |
| 1.3 |
1.3
Prescriptive compliance is based on Table R402.1.3 with the following
modifications:
Vertical fenestration U = 0.18
Ceiling and single-rafter or joist-vaulted R-60 advanced
Wood frame wall R-21 int plus R-12 ci
Floor R-38
Basement wall R-21 int plus R-12 ci
Slab on grade R-10 perimeter and under entire slab
Below grade slab R-10 perimeter and under entire slab
or |
47 |
pdf_text |
| 1.4 |
1.4
Prescriptive compliance is based on Table R402.1.3 with the following
modifications:
Vertical fenestration U = 0.18
Ceiling and single-rafter or joist-vaulted R-60 advanced
Wood frame wall R-21 int plus R-16 ci
Floor R-48
Basement wall R-21 int plus R-16 ci
Slab on grade R-20 perimeter and under entire slab
Below grade slab R-20 perimeter and under entire slab
or
Compliance based on Section R402.1.5: Reduce the Total conductive
UA by 30%. |
48 |
pdf_text |
| 1.5 |
1.5 credit for each addition of 500 square feet or larger to a single-family, two-family or townhous
dwelling unit.
Where Section R405, Simulated performance alternative, is used, the maximum allowable energy
consumption shall be 84 percent of the value calculated according to Section R405.3. |
68 |
pdf_text |
| 10 |
10 CFR Part 430 Uniform Energy Factor or the equipment shall meet the requirements of Section C4
R403.5.1 Heated water circulation and temperature maintenance systems. Heated water
circulation systems shall be in accordance with Section R403.5.1.1. Heat trace temperature
maintenance systems shall be in accordance with Section R403.5.1.2. Automatic controls, tempera
sensors and pumps shall be in a location with access. Manual controls shall be in a location with re
access.
R403.5.1.1 Circulation systems. Heated water circulation systems shall be provided with a
circulation pump. The system return pipe shall be a dedicated return pipe or a cold water supply
Gravity and thermosyphon circulation systems shall be prohibited. Controls for circulating hot wat
system pumps shall automatically turn off the pump when the water in the circulation loop is at th
desired temperature and when there is no demand for hot water. The controls shall limit the
temperature of the water entering the cold water piping to not greater than 104° F (40°C).
R403.5.1.1.1 Demand recirculation water systems. Demand recirculation water systems sha
have controls that start the pump upon receiving a signal from the action of a user of a fixture o
appliance, sensing the presence of a user of a fixture or sensing the flow of hot or tempered wa
to a fixture fitting or appliance.
R403.5.1.2 Heat trace systems. Electric heat trace systems shall comply with IEEE 515.1 or UL
Controls for such systems shall a |
33 |
pdf_text |
| 10 (cont. 2) |
utomatically adjust the energy input to the heat tracing to mainta
the desired water temperature in the piping in accordance with the times when heated water is us
in the occupancy.
R403.5.2 Water volume determination. The volume shall be the sum of the internal volumes of pi
fittings, valves, meters, and manifolds between the nearest source of heated water and the terminat
of the fixture supply pipe. Water heaters, circulating water systems, and heat trace temperature |
33 |
pdf_text |
| 10.0 |
10.0) shall be installed and provide heating to the largest zone of the
housing unit.
To qualify to claim this credit, the building permit drawings shall specify
the option being selected and shall specify the heating equipment type
and the minimum equipment efficiency. |
50 |
pdf_text |
| 100 |
100—2020
Procedure for Determining Fenestration Products U-factors—Second Edition .. |
65 |
pdf_text |
| 100 |
100 Barr Harbor Drive
West Conshohocken, PA 19428-2859
Standard
R
reference
number
Title
sectio
C 1363-11
Standard Test Method for Thermal Performance of
Building Materials and Envelope Assemblies
by Means of a Hot Box Apparatus ................................................................. R30
E 283—2004 (2012)
Test Method for Determining the Rate of Air Leakage
Through Exterior Windows, Curtain Walls and Doors Under
Specified Pressure Differences Across the Specimen ..................................... R
E 779-2010 (2018)
Standard Test Method for Determining Air Leakage Rate
by Fan Pressurization .................................................................................... R40
E1554/E1554M—E2013
Standard Test Methods for Determining Air Leakage of
Air Distribution Systems by Fan Pressurization ................................................. R
E1827-2011 (2017)
Standard Test Method for Determining Airtightness of
Building Using an Orifice Blower Door ........................................................... R40
E2178—2013
Standard Test Method for Air Permeance of Building Materials ........................... R
E3158—2018
Standard Test Method for Measuring the Air Leakage Rate
of a Large or Multizone Building ................................................................... R40
CSA
Canadian Standards Association |
63 |
pdf_text |
| 100 |
100 square feet (9.29 m2) of conditioned floor area or total leakage shall be less than or equa |
33 |
pdf_text |
| 1000 |
1000 North Rand Road, Suite 214
Wauconda, IL 60084
Standard
R
reference
number
Title
sectio |
64 |
pdf_text |
| 101 |
101/I.S.2/A440—17
North American Fenestration Standard/Specification for
Windows, Doors and Unit Skylights ................................................................. R
WSU
Washington State University Energy Extension Program |
66 |
pdf_text |
| 101 |
101/I.S.2/A440—17
North American Fenestration Standard/Specification for
Windows, Doors and Unit Skylights ................................................................. R
CSA 55.1-2015
Test Method for Measuring Efficiency and Pressure Loss
of Drain Water Heat Recovery Systems .................................... R403.5.4, Table
CSA 55.2-2015
Drain Water Heat Recovery Units ...................................................................... R
CSA P.4.1-15
Testing Method for Measuring Annual Fireplace Efficiency ................................ R
DASMA
Door and Access System Manufacturers Association |
63 |
pdf_text |
| 101 |
101/I.S.2/A C440—17
North American Fenestration Standard/
Specifications for Windows, Doors and Unit Skylights ...................................... R
ACCA
Air Conditioning Contractors of America |
62 |
pdf_text |
| 101 |
101/I.S.2/A440 by an accredited, independent laboratory and listed and labeled by the manufacture
Exceptions: |
30 |
pdf_text |
| 105-2017 |
105-2017
Test Method for Thermal Transmittance and
Air Infiltration of Garage Doors ......................................................................... R |
63 |
pdf_text |
| 1300 |
1300 Sumner Avenue
Cleveland, OH 44115-2851
Standard
R
reference
number
Title
sectio |
63 |
pdf_text |
| 1300 |
1300 17th Street N No. 900
Arlington, VA 22209
Standard
R
reference
number
Title
sectio
OS 4—2016
Requirements for Air-Sealed Boxes for Electrical and
Communications Applications ..............................................................................
NFPA
National Fire Protection Association’ |
65 |
pdf_text |
| 1400 |
1400 East Touhy Avenue, Suite 470
Des Plaines, IL 60018
Standard
R
reference
number
Title
sectio
AAMA/WDMA/CSA |
66 |
pdf_text |
| 16 |
16
Vented Decorative Gas Appliances ...................................................................... R
Z21.88-2017/CSA 2.23- |
62 |
pdf_text |
| 17 |
17
Vented Gas Fireplace Heaters............................................................................. R
Z21.40.2-1996
Gas-fired, Work Activated Air-Conditioning and
Heat Pump Appliances (Internal Combustion) ............................................ Table
Z21.40.4-1996
Performance Testing and Rating of Gas-Fired,
Air-Conditioning and Heat Pump Appliances .............................................. Table
APSP
The Association of Pool and Spa Professionals |
62 |
pdf_text |
| 1791 |
1791 Tullie Circle, NE
Atlanta, GA 30329-2305
Standard
R
reference
number
Title
sectio
ASHRAE—2021
ASHRAE Handbook of Fundamentals .................................. R402.1.5, Table R40
ASHRAE 193—2010
(RA 2014)
Method of Test for Determining the Airtightness of HVAC Equipment ............. R40
ASTM
ASTM International |
63 |
pdf_text |
| 1827 |
1827 Walden Office Square
Suite 550
Schaumburg, IL 60173-4268
Standard
R
reference
number
Title
sectio
AAMA/WDMA/CSA |
62 |
pdf_text |
| 2 |
2. Postconstruction test: Leakage to outdoors shall be less than or equal to4 cfm (113.3 L/min) |
33 |
pdf_text |
| 2 |
2. Tankless water heaters. |
34 |
pdf_text |
| 2 |
2. A statement from a passive house certifier that the modeled energy performance is congruen
with the plans and specifications, and that the modeled performance meets said standard.
Prior to the issuance of a certificate of occupancy, the following item must be provided to the cod
official: |
56 |
pdf_text |
| 2 |
2. Fireplaces and stoves complying with Section R402.3.6 of this code and Section R100
the International Residential Code.
R402.3.6 Fireplaces. New wood-burning fireplaces shall have tight-fitting flue dampers or doors an
outdoor combustion air. When using tight-fitting doors on factory-built fireplaces listed and labeled i
accordance with UL 127, the doors shall be tested and listed for the fireplace. When using tight-fitti
doors on masonry fireplaces, the doors shall be listed and labeled in accordance with UL 907. Gas
fireplaces shall comply with the efficiency requirements in Section R403.7.2.
R402.4 Air leakage. The building thermal envelope shall be constructed to limit air leakage in
accordance with the requirements of Sections R402.4.1 through R402.4.4.
R402.4.1 Building thermal envelope air leakage. The building thermal envelope shall comply wit
Sections R402.4.1.1 through R402.4.1.3. The sealing methods between dissimilar materials shall al
for differential expansion and contraction.
R402.4.1.1 Installation. The components of the building thermal envelope as listed in Table
R402.4.1.1 shall be installed in accordance with the manufacturer's instructions and the criteria lis
in Table R402.4.1.1, as applicable to the method of construction. Where required by the code offi
an approved third party shall inspect all components and verify compliance.
R402.4.1.2 Testing. The building or dwelling unit shall be tested for air leakage. Testing shall be
conducted in a |
26 |
pdf_text |
| 2 |
2. The repair is energy efficient and is necessary for the health, safety, and welfare of the general
public.
R504.2 Application. For the purposes of this code, the following shall be considered repairs. |
61 |
pdf_text |
| 2 |
2. Lighting shall be automatically shut off when daylight is present and satisfies the lighting needs. |
37 |
pdf_text |
| 2 |
2. Pumps that operate solar- and waste-heat-recovery pool heating systems.
R403.10.3 Covers. Outdoor heated pools and outdoor permanent spas shall be provided with a va
retardant cover, or other approved vapor retardant means.
Exception: Where more than 75 percent of the energy for heating, computed over an operating
season of not fewer than three calendar months, is from a heat pump or on-site renewable energ
system, covers or other vapor-retardant means shall not be required.
R403.10.4 Residential pool pumps. Pool pump motors may not be split-phase or capacitor start-
induction run type.
R403.10.4.1 Two-speed capability. |
36 |
pdf_text |
| 2 |
2. Dampers including exhaust, intake, makeup air, backdraft and flue dampers shall be closed
but not sealed beyond intended infiltration control measures. |
26 |
pdf_text |
| 2 |
2)
The thermal break material must produce a gap in the frame material of not less than 0.210 inches; and |
15 |
pdf_text |
| 2 |
2. The hot water rectangle shall include the source of hot water and the points of termination of all hot w
fixture supply piping. |
44 |
pdf_text |
| 2 |
2 or
more
stories
>60%
>30%
>30%
to
≤60%
>15%
to
≤30% |
43 |
pdf_text |
| 2 |
2. The name, organization and contact information of the individual performing the analysis a
generating the compliance report. |
38 |
pdf_text |
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2. Floor framing cavity insulation shall be permitted to be in contact with the top side of sheathin
separating the cavity and the unconditioned space below. Insulation shall extend from the bot
to the top of all perimeter floor framing members and the framing members shall be air seale |
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| 2 |
2.
Refrigerator (if provided) – Energy Star rated (Version 5.1) |
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| 2 |
2. Existing duct systems constructed, insulated or sealed with asbestos.
R503.1.3 Service hot water systems. New service hot water systems that are part of the alteratio
shall comply with Section R403.5.
Exception: Replacement of water heating equipment shall not be required to comply with Sectio
R403.5.5. |
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| 2 |
2. Medium Dwelling Unit: ...................................................................................... 8.0 credits
All dwelling units that are not included in #1, #3 or #4. |
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| 2 |
2. Pump controls: Pool pump motor controls shall have the capability of operating the pool pum
with at least two speeds. The default circulation speed shall be the lowest speed, with a high
speed override capability being for a temporary period not to exceed one normal cycle.
R403.10.4.2 Pump operation. Circulating water systems shall be controlled so that the circulatio
pump(s) can be conveniently turned off, automatically or manually, when the water system is not i
operation.
R403.11 Portable spas. The energy consumption of electric-powered portable spas shall be controll
by the requirements of APSP-14.
R403.12 Residential pools and permanent residential spas. The energy consumption of residenti
swimming pools and permanent residential spas shall be controlled in accordance with the requireme
of APSP-15.
R403.13 Reserved. |
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2. For ducts having a static pressure classification of less than 2 inches of water column (500
additional closure systems shall not be required for continuously welded joints and seams,
locking-type joints and seams of other than the snap-lock and button-lock types.
R403.3.4.1 Sealed air handler. Air handlers shall have a manufacturer's designation for an air
leakage of no more than 2 percent of the design air flow rate when tested in accordance with
ASHRAE 193.
R403.3.5 Duct testing. Ducts shall be leak tested in accordance with WSU RS-33, using the maxi
duct leakage rates specified.
Exception: A duct air leakage test shall not be required for ducts serving ventilation systems that
not integrated with ducts serving heating or cooling systems.
A written report of the results shall be signed by the party conducting the test and provided to the c
official.
R403.3.6 Duct leakage. The total leakage of the ducts, where measured in accordance with Sectio
R403.3.3, shall be as follows: |
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2. U-factors for fenestration and the solar heat gain coefficient (SHGC) of fenestration. Where the
more than one value for each component, the certificate shall indicate the area weighted avera
value. |
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2. Roof repairs. |
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| 2 |
2. Owner-built, nonoperable wood frame window consisting of a double pane unit with low-e
(E=0.04 or less), ½-inch airspace with argon fill.
TABLE R303.1.3(1)
DEFAULT GLAZED WINDOW, GLASS DOOR AND SKYLIGHT U-FACTOR
a.
Metal Thermal Break = A metal thermal break framed window shall incorporate the following minimum desi
characteristics: |
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| 2 |
2. For structures less than 1,500 square feet of conditioned floor area, the annual site energy
consumption shall be less than or equal to 64 percent of the annual site energy consumption of
standard reference design. |
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| 2 |
2)
The thermal break material must produce a gap in the frame material of not less than 0.210 in
and |
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| 2 |
2. For heat pumps located in unconditioned space, the outside air temperature is below 40°F
(4°C). |
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| 2 |
2. Duct systems that are documented to have been previously sealed as confirmed through fi
verification and diagnostic testing in accordance with procedures in WSU RS-33. |
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| 2 |
2. Any wall having a heat capacity greater than or equal to 6 Btu/ft2 x °F (123 kJ/m3 x K).
R402.2.6 Steel-frame ceilings, walls, and floors. Steel-frame ceilings, walls, and floors shall com
with the U-factor requirements of Table R402.1.2.
R402.2.7 Floors. Floor cavity insulation shall comply with one of the following: |
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| 2 |
2. Multiple single-family dwellings (townhouses). |
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| 2 |
2. Systems controlled solely by a manually operated timer capable of operating the system for
more than two hours. |
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| 2 |
2. At all points along each duct, the sum of the ceiling insulation R-value against and above the
of the duct, and against and below the bottom of the duct, shall be not less than R-19, exclud
the R-value of the duct insulation.
Exception: Sections of the supply duct that are less than 3 feet (914 mm) from the supply
outlet shall not be required to comply with these requirements.
R403.3.3.1 Effective R-value of deeply buried ducts. Where using the Total Building Performa
compliance option in Section R405, sections of ducts that are: installed in accordance with Sectio
R403.3.3; located directly on, or within 5.5 inches (140 mm) of the ceiling; surrounded with blown
attic insulation having an R-value of R-30 or greater and located such that the top of the duct is n
less than 3.5 inches (89 mm) below the top of the insulation, shall be considered as having an
effective duct insulation R-value of R-25.
R403.3.4 Sealing. Ducts, air handlers, and filter boxes shall be sealed. Joints and seams shall com
with either the International Mechanical Code or International Residential Code, as applicable.
Exceptions: |
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2. All heating, cooling and ventilation system components shall be installed inside the condition
space including, but not limited to, forced air ducts, hydronic piping, hydronic floor heating loo
convectors and radiators. Combustion equipment shall be direct vent or sealed combustion. |
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| 2 |
2. Insulation materials and their R-values. |
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| 2 |
2. Those that do not contain conditioned space. |
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| 2 |
2. Household cooking appliances.
Exception: Household cooking appliances without electrical supply voltage connection
and in which each pilot light consumes less than 150 Btu/hr. |
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| 2 |
2.
Emissivities shall be less than or equal to the value specified. |
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| 2 |
2. The alteration is energy efficient and is necessary for the health, safety, and welfare of the
general public.
R503.1.1 Building envelope. Building envelope assemblies that are part of the alteration shall co
with Section R402.1.3 or R402.1.5, Sections R402.2.1 through R402.2.10, R402.3.1, R402.3.2,
R402.3.5 and R402.4.2.
Exception: The following alterations need not comply with the requirements for new construction
provided the energy use of the building is not increased: |
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2. AIR LEAKAGE CONTROL AND EFFICIENT VENTILATION OPTIONS
Only one option from Items 2.1 through 2.3 may be selected in this category. |
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| 2 |
2. Calculations that account for the effects of indoor and outdoor temperatures and part-load rat
on the performance of heating, ventilating and air-conditioning equipment based on climate a
equipment sizing. |
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| 2 |
2. Existing ceiling, wall or floor cavities exposed during construction provided that these cav
are filled with insulation. 2x4 framed walls shall be insulated to a minimum of R-15 and 2
framed walls shall be insulated to a minimum of R-21. |
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| 2 |
2. Custom exterior fenestration products manufactured by a small business provided they me
the applicable provisions of Chapter 24 of the International Building Code. Once visual
inspection has confirmed the presence of a gasket, operable windows and doors manufact
by small business shall be permitted to be sealed off at the frame prior to the test.
R402.4.3 Recessed lighting. Recessed luminaires installed in the building thermal envelope shall
Type IC-rated and certified under ASTM E283 as having an air leakage rate not more than 2.0 cfm
(0.944 L/s) when tested at a 1.57 psf (75 Pa) pressure differential and shall have a label attached
showing compliance with this test method. All recessed luminaires shall be sealed with a gasket or
caulk between the housing and the interior wall or ceiling covering.
R402.4.4 Electrical and communication outlet boxes (air-sealed boxes). Electrical and
communication outlet boxes installed in the building thermal envelope shall be sealed to limit air
leakage between conditioned and unconditioned spaces. Electrical and communication outlet boxe
shall be tested in accordance with NEMA OS 4, Requirements for Air-Sealed Boxes for Electrical a
Communication Applications, and shall have an air leakage rate of not greater than 2.0 cubic feet p
minute (0.944 L/s) at a pressure differential of 1.57 psf (75 Pa). Electrical and communication outlet
boxes shall be marked “NEMA OS 4” or “OS 4” in accordance with NEMA OS 4. Electrical and
communic |
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2. Substantial contact with the surface being insulated is not required in enclosed floor/ceiling
assemblies containing ducts where full R-value insulation is installed between the duct and
exterior surface.
R402.2.8 Below-grade walls. Below-grade exterior wall insulation used on the exterior (cold) side
the wall shall extend from the top of the below-grade wall to the top of the footing and shall be appr
for below-grade use. Above-grade insulation shall be protected. Insulation used on the interior (war
side of the wall shall extend from the top of the below-grade wall to the below-grade floor level and
include R-5 rigid board providing a thermal break between the concrete wall and the slab.
R402.2.9 Slab-on-grade floors. The minimum thermal resistance (R-value) of the insulation aroun
the perimeter of unheated or heated slab-on-grade floors shall be as specified in Table R402.1.3. T
insulation shall be placed on the outside of the foundation or on the inside of the foundation wall. T
insulation shall extend downward from the top of the slab for a minimum distance as shown in the t
or to the top of the footing, whichever is less, or downward to at least the bottom of the slab and the
horizontally to the interior or exterior for the total distance shown in the table. A two-inch by two-inc
(maximum) pressure treated nailer may be placed at the finished floor elevation for attachment of
interior finish materials. Insulation extending away from the building shall be protec |
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2. Declaration of the total building performance path on the title page of the energy report and
title page of the building plans. |
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| 2 (cont. 2) |
ted by pavement
by a minimum of 10 inches (254 mm) of soil.
R402.2.9.1 Heated slab-on-grade floors. The entire area of a heated slab-on-grade floor shall b
thermally isolated from the soil with a minimum of R-10 insulation. The insulation shall be an
approved product for its intended use. If a soil gas control system is present below the heated sla
on-grade floor, which results in increased convective flow below the heated slab-on-grade floor, t
heated slab-on-grade floor shall be thermally isolated from the sub-slab gravel layer. R-10 heated
slab-on-grade floor insulation is required for all compliance paths.
R402.2.10 Masonry veneer. Insulation shall not be required on the horizontal portion of the founda
that supports a masonry veneer.
R402.3 Fenestration. In addition to the requirements of Section R402, fenestration shall comply with
Sections R402.3.1 through R402.3.6.
R402.3.1 U-factor. An area-weighted average of fenestration products shall be permitted to satisfy
U-factor requirements.
R402.3.2 Glazed fenestration SHGC. An area-weighted average of fenestration products more th |
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| 2 (cont. 2) |
ation outlet boxes shall be installed per the manufacturer’s instructions and with any sup
components required to achieve compliance with NEMA OS 4.
R402.5 Maximum fenestration U-factor. The area-weighted average maximum fenestration U-facto
permitted using tradeoffs from Section R402.1.5 or R405 shall be 0.48 for vertical fenestration, and 0.
for skylights.
Exception: The maximum U-factor and solar heat gain coefficient (SHGC) for fenestration shall not
required in storm shelters complying with ICC 500.
SECTION R403
SYSTEMS
R403.1 Controls. Not less than one thermostat shall be provided for each separate heating and cooli
system.
R403.1.1 Programmable or connected thermostat. Where the primary heating system is a force
furnace, at least one thermostat per dwelling unit shall be Energy Star certified and capable of
controlling the heating and cooling system on a daily schedule to maintain different temperature set
points at different times of the day and different days of the week. The thermostat shall allow for, at
minimum, a 5-2 programmable schedule (weekdays/weekends) and be capable of providing at leas
two programmable setback/setup periods per day. This thermostat shall include the capability to set
back, set up or temporarily operate the system to maintain zone temperatures down to 55°F (13°C)
up to 85°F (29°C). The thermostat shall be programmed initially by the manufacturer with a heating
temperature set point of not greater than 70°F (21°C) and a cooling t |
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ccordance with RESNET/ICC 380, ASTM E779, or ASTM E1827. Test pressure a
leakage rate shall comply with Section R402.1.3. A written report of the test results, including veri
location and time stamp of the date of the test, shall be signed by the testing agency and provide
the building owner and code official. Testing shall be performed at any time after creation of all
penetrations of the building thermal envelope. Once visual inspection has confirmed air sealing h
been conducted in accordance with Table R402.4.1.1, operable windows and doors manufacture
small business are permitted to be sealed off at the frame prior to the test.
Testing of single-family dwellings and townhouses shall be conducted in accordance with
RESNET/ICC 380. Test pressure and leakage rate shall comply with Section R402.1.3.1.
For Group R-2 occupancies, testing shall be conducted in accordance with ASTM E779, ASTM
E1827, or ASTM E3158. Test pressure and leakage rate shall comply with Section R402.1.3.2. T
individual performing the air leakage test shall be trained and certified by an certification body tha
at the time of permit application, an ISO 17024 accredited certification body including, but not limi
to, the Air Barrier Association of America.
During testing: |
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emperature set point of not les
than 78°F (26°C). The thermostat and/or control system shall have an adjustable deadband of not l
than 10°F.
Exceptions: |
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| 2.0 |
2.0 credit for each new single-family, two-family and townhouse dwelling unit. |
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| 2.1 |
2.1
Compliance based on Section R402.4.1.2:
Reduce the tested air leakage to 2.0 air changes per hour maximum at |
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| 2.2 |
2.2
Compliance based on Section R402.4.1.2:
Reduce the tested air leakage to 1.5 air changes per hour maximum at |
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| 2.3 |
2.3
Compliance based on Section R402.4.1.2:
Reduce the tested air leakage to 0.6 air changes per hour maximum at |
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| 200 |
200—2020
Procedure for Determining Fenestration Product Solar Heat Gain Coefficients
and Visible Transmittance at Normal Incidence—Second Edition .................... |
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| 2011 |
2011
American National Standard for Residential Swimming Pool
and Spa Energy Efficiency ....................................................................................
ANSI/RESNET/ICC 380— |
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2015 Washington State Energy Code
ABBREVIATIONS:
AFB Air Force Base
AP Airport
CO City Office
RS Ranger Station
Typical: "4(miles)NE" |
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| 2019 |
2019
Standard for Testing Airtightness of Building Dwelling Unit
and Sleeping Unit Enclosures; Airtightness of Heating and
Cooling Air Distribution Systems, and Airflow of Mechanical
Ventilation Systems ........................................................................................... R
IBC—21
International Building Code ..................................................... R201.3, R303.2, R
ICC 400—17
Standard on the Design and Construction of Log Structures .................. Table R
ICC 500—2020
ICC/NSSA Standard for the Design and Construction of Storm Shelters ..............
IFC—21
International Fire Code .........................................................................................
IFGC—21
International Fuel Gas Code ..................................................................................
IMC—21
International Mechanical Code .................................................. R201.3, R403.2.2
IRC—21
International Residential Code ................. R201.3, R303.2, R402.2.10, R403.2.2
IEEE
The Institute of Electrical and Electronic Engineers, Inc. |
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WDMA
Window and Door Manufacturers Association |
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APPENDIX RA / RB
OPTIONAL ENERGY EFFICIENCY MEASURES
Appendix RA—Optional energy efficiency measures—One step. Building owners may choose to
this appendix to achieve an additional 6 percent savings in building energy use. The number of additi
energy efficiency credits required by Section R406.3 would be increased by the following amounts: |
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R403.6 Mechanical ventilation. The buildings complying with Section R402.4.1 shall be provided wit
mechanical ventilation that meets the requirements of Section M1505 in the International Residential
Code or the International Mechanical Code, as applicable, or with other approved means of ventilatio
Outdoor air intakes and exhausts shall have automatic or gravity dampers that close when the ventila
system is not operating.
R403.6.1 Whole-house mechanical ventilation system fan efficacy. Mechanical ventilation syst
fans shall meet the efficacy requirements of Table R403.6.1 at one or more rating points. Fans
shall be tested in accordance with HVI 916 and listed. The airflow shall be reported in the product li
or on the label. Fan efficacy shall be reported in the product listing or shall be derived from the inpu
power and airflow values reported in the product listing on the label. Fan efficacy for fully ducted H
ERV, balanced, and in-line fans shall be determined at a static pressure of not less than 0.2 inch w.
(49.85 Pa). Fan efficacy for ducted range hoods, bathroom and utility room fans shall be determine
a static pressure of not less than 0.1 inch w.c. (24.91 Pa).
TABLE R403.6.1
WHOLE-DWELLING MECHANICAL VENTILATION SYSTEM FAN EFFICACYa
For SI: 1 cfm = 28.3 L/min.
a. Design outdoor or exhaust airflow rate/watts of fan used. |
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TABLE R402.4.1.1 (continued)
AIR BARRIER, AIR SEALING AND INSULATION INSTALLATIONa
COMPONENT
AIR BARRIER CRITERIA
INSULATION CRITERIA
Windows, skylights and
doors
The space between window/door jambs
and framing and skylights and framing
shall be sealed. |
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CHAPTER 5
EXISTING BUILDINGS |
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TABLE R303.1.3(2)
DEFAULT OPAQUE DOOR U-FACTORS
Door Type
No Glazed
Fenestratio
n
Single
Glazing
Double
Glazing with
¼ in.
Airspace
Double
Glazing
with
½ in.
Airspace
Dou
Gla
e=0.
½ in
SWINGING DOORS (Rough opening – 38 in. x 82 in.)
Slab Doors
Wood slab in wood framea |
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THERMOSTAT. An automatic control device used to maintain temperature at a fixed or adjustable set p
U-FACTOR (THERMAL TRANSMITTANCE). The coefficient of heat transmission (air to air) through a buildin
component or assembly, equal to the time rate of heat flow per unit area and unit temperature differe
between the warm side and cold side air films (Btu/h • ft2 • °F) [W/(m2 • K)].
UNHEATED SLAB-ON-GRADE FLOOR. A slab-on-grade floor that is not a heated slab-on-grade floor.
VENTILATION. The natural or mechanical process of supplying conditioned or unconditioned air to, or
removing such air from, any space.
VENTILATION AIR. That portion of supply air that comes from outside (outdoors) plus any recirculated ai
that has been treated to maintain the desired quality of air within a designated space.
VISIBLE TRANSMITTANCE [VT]. The ratio of visible light entering the space through the fenestration prod
assembly to the incident visible light, visible transmittance, includes the effects of glazing material an
frame and is expressed as a number between 0
and 1.
WHOLE HOUSE MECHANICAL VENTILATION SYSTEM. An exhaust system, supply system, or combination
thereof that is designed to mechanically exchange indoor air with outdoor air when operating continuo
or through a programmed intermittent schedule to satisfy the whole house ventilation rates.
ZONE. A space or group of spaces within a building with heating or cooling requirements that are
sufficientl |
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ASHRAE
American Society of Heating, Refrigerating and Air-Conditioning Engineers, Inc. |
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TABLE R405.2
MANDATORY COMPLIANCE MEASURES FOR TOTAL BUILDING PERFORMANCE
Sectiona
Title
Comments
General
R401.3
Certificate
Envelope
R402.1.1
Vapor retarder
R402.2.3
Eave baffle
R402.2.4.1
Access hatches and doors
R402.4
Air leakage
R402.5
Maximum fenestration U-factor
Systems
R403.1
Controls
R403.3
Ducts
Except for R403.3.2 and
R403.3.3
R403.4
Mechanical system piping insulation
R403.5.1
Heated water circulation and temperature maintenance system
R403.5.3
Drain water heat recovery units
R403.6
Mechanical ventilation
R403.7
Equipment sizing and efficiency rating
R403.8
Systems serving multiple dwelling units
R403.9
Snow melt system controls
R403.10
Energy consumption of pools and spas
R403.11
Portable spas
R403.12
Residential pools and permanent residential spas
Electrical Power and Lighting
R404.1
Lighting equipment
R404.2
Interior lighting controls
a.
Reference to a code section includes all the relative subsections except as indicated in the table. |
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TABLE R405.4.2(2)
DEFAULT DISTRIBUTION SYSTEM EFFICIENCIES FOR PROPOSED DESIGNSa
For SI: 1 cubic foot per minute = 0.47 L/s, 1 square foot = 0.093m2, 1 pound per square inch = 6895 Pa, 1
water gauge = 1250 Pa.
a.
Values given by this table are for distribution systems, which must still meet all prescriptive requirement
duct and pipe system insulation and leakage.
b.
Entire system in conditioned space shall mean that no component of the distribution system, including t
air-handler unit, is located outside of the conditioned space. All components must be located on the inte
side of the thermal envelope (inside the insulation) and also inside of the air barrier. Refrigerant
compressors and piping are allowed to be located outside.
c.
Zonal systems are systems where the heat source is located within each room. Systems shall be allowe
have forced airflow across a coil but shall not have any ducted airflow external to the manufacturer’s air
handler enclosure. Hydronic systems do not qualify.
R405.5 Calculation software tools. Calculation software, where used, shall be in accordance with
Sections R405.5.1 through R405.5.3.
R405.5.1 Minimum capabilities. Calculation procedures used to comply with this section shall be
software tools capable of calculating the annual energy consumption of all building elements that di
between the standard reference design and the proposed design and shall include the following
capabilities: |
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TABLE R405.4.2(1) (continued)
SPECIFICATIONS FOR THE STANDARD REFERENCE AND PROPOSED DESIGNS
BUILDING
COMPONENT
STANDARD REFERENCE DESIGN
PROPOSED DESIG
Air exchange rate
Air leakage rate of 4.0 air changes per hour at a pressure
of 0.2 inches w.g. (50 Pa).
As proposeda.
The mechanical ventilation rate shall be in addition to the
air leakage rate and the same as in the proposed design,
but no greater than 0.01 × CFA +7.5 × (Nbr + 1)
where:
CFA = conditioned floor area
Nbr = number of bedrooms
The mechanical ventilation system type shall be the same
as in the proposed design. Energy recovery shall not be
assumed for mechanical ventilation.
The mechanical ventila
rateb shall be in additio
the air leakage rate an
shall be as proposed.
Mechanical ventilation
None, except where mechanical ventilation is specified by
the proposed design, in which case:
Annual vent fan energy use:
kWh/yr = (1ef) × (0.0876 x CFA + 65.7 × (Nbr + 1)
where:
ef = the minimum fan efficacy from Table R403.6.1
corresponding to the system type at to a flow rate
of 0.01 × CFA + 7.5 × (Nbr+1)
CFA = conditioned floor area
Nbr = number of bedrooms
As proposed
Internal gains
IGain = 17,900 + 23.8 × CFA + 4104 × Nbr (Btu/day per
dwelling unit)
Same as standard
reference design
Internal mass
An internal mass for furniture and contents of 8 pounds
per square foot of floor area.
Same as standard
reference design, plus
|
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EQUATION 2 — GROUP R OCCUPANCY
PROPOSED UA
UA
=
UWAW + UBGWABGW + UVGAVG + UOGAOG + UFAF + URCARC + UDAD + FSPS+ FBGSPBGS
Where:
UA
=
the combined thermal transmittance of the gross exterior wall, floor and roof/ceiling assem
area.
UW
=
the thermal transmittance of the opaque above grade wall area.
AW
=
opaque above grade wall area.
UBGW
=
the thermal transmittance value of the below grade opaque wall.
ABGW
=
opaque below grade wall area.
UVG
=
the thermal transmittance value of the fenestration glazing.
AVG
=
fenestration glazing area, including windows in exterior doors.
UOG
=
the thermal transmittance value of the skylight glazing.
AOG
=
skylight glazing area.
UF
=
the thermal transmittance of the floor.
AF
=
floor area over unconditioned space.
URC
=
the thermal transmittance of the ceiling.
ARC
=
ceiling area.
UD
=
the thermal transmittance value of the opaque door area.
AD
=
opaque door area.
FS
=
concrete slab on grade component F-factor.
PS
=
lineal ft. of concrete slab on grade perimeter.
FBGS
=
concrete below grade slab component F-factor.
PBGS
=
lineal ft. of concrete below grade slab perimeter.
NOTE: Where more than one type of wall, window, roof/ceiling, door and skylight is used, the U and A terms for
those items shall be expanded into sub-elements as:
UW1AW1 + UW2AW2 + UW3AW3 + ...etc. |
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CHAPTER 1 [RE]
SCOPE AND ADMINISTRATION |
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e.
For a proposed design without a proposed heating system, a heating system with the prevailing federal
minimum efficiency shall be assumed for both the standard reference design and proposed design.
f.
For a proposed design home without a proposed cooling system, an electric air conditioner with the
prevailing federal minimum efficiency shall be assumed for both the standard reference design and the
proposed design.
g.
For a proposed design with a nonstorage-type water heater, a 40-gallon storage-type water heater with
prevailing federal minimum energy factor for the same fuel as the predominant heating fuel type shall b
assumed. For the case of a proposed design without a proposed water heater, a 40-gallon storage-type
water heater with the prevailing federal minimum efficiency for the same fuel as the predominant heatin
type shall be assumed for both the proposed design and standard reference design.
h
For residences with conditioned basements, R-2 and R-4 residences and townhouses, the following for
shall be used to determine fenestration area:
AF = As x FA x F
Where:
AF =
Total fenestration area.
As =
Standard reference design total fenestration area.
FA =
(Above-grade thermal boundary gross wall area)/(above-grade boundary wall area +
below-grade boundary wall area).
F
=
(Above-grade thermal boundary wall area)/(above-grade thermal boundary wall
area + common wall area) or 0.56, whichever is greater.
and where:
The |
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INTEGRATED ENERGY EFFICIENCY RATIO (IEER). A single-number figure of merit expressing cooling part-l
EER efficiency for unitary air-conditioning and heat pump equipment on the basis of weighted operati
at various load capacities for the equipment.
INTERMEDIATE FRAMED WALLS. Studs framed on 16-inch centers with double top plate and single botto
plate. Corners use two studs or other means of fully insulating corners, and each opening is framed b
two studs. Headers shall be insulated to R-10.
LABELED. Equipment, materials or products to which have been affixed a label, seal, symbol or other
identifying mark of a nationally recognized testing laboratory, approved agency or other organization
concerned with product evaluation that maintains periodic inspection of the production of the above-
labeled items and whose labeling indicates either that the equipment, material or product meets identi
standards or has been tested and found suitable for a specified purpose.
LISTED. Equipment, materials, products or services included in a list published by an organization
acceptable to the code official and concerned with evaluation of products or services that maintains
periodic inspection of production of listed equipment or materials or periodic evaluation of services an
whose listing states either that the equipment, material, product or service meets identified standards
has been tested and found suitable for a specified purpose.
LOG STRUCTURE. A t |
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SECTION R404
ELECTRICAL POWER AND LIGHTING SYSTEMS
R404.1 Lighting equipment. All permanently installed lighting fixtures, excluding kitchen appliance
lighting fixtures, shall contain only high-efficacy lighting sources.
R404.1.1 Exterior lighting. Connected exterior lighting for residential buildings shall comply with
Section C405.5.
Exceptions: Solar-powered lamps not connected to any electrical service.
R404.1.2 Fuel gas lighting equipment. Fuel gas lighting systems shall not have continuously burn
pilot lights.
R404.2 Interior lighting controls. Permanently installed interior lighting fixtures shall be controlled w
either a dimmer, an occupant sensor control or other control that is installed or built into the fixture.
Exception: Lighting controls shall not be required for the following: |
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TABLE R402.4.1.1 (continued)
AIR BARRIER, AIR SEALING AND INSULATION INSTALLATIONa
COMPONENT
AIR BARRIER CRITERIA
INSULATION CRITERIA
Plumbing, wiring or other
obstructions
All holes created by wiring, plumbing or
other obstructions in the air barrier
assembly shall be air sealed.
Batt insulation shall be cut neatly t
around wiring and plumbing in
exterior walls. There shall be no v
or gaps or compression where cut
fit. Insulation that on installation
readily conforms to available spac
shall extend behind piping and wiri
Insulation shall be installed to fill th
available space and surround wirin
plumbing, or other obstructions,
unless the required R-value can b
met by installing insulation and air
barrier systems completely to the
exterior side of the obstructions.
Shower/tub on exterior wall
The air barrier installed at exterior walls
adjacent to showers and tubs shall
separate the wall from the showers and
tubs.
Exterior walls adjacent to showers
and tubs shall be insulated.
Electrical/phone box on
exterior wall
The air barrier shall be installed behind
electrical or communication boxes or air
sealed boxes shall be installed.
HVAC register boots
HVAC supply and return register boots
shall be sealed to the subfloor, wall
covering or ceiling penetrated by the boot. |
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TABLE R303.1.3(4)
DEFAULT U-FACTORS FOR SKYLIGHTS
Frame Type
Fenestration Type
Aluminum
Without
Thermal
Break
Aluminum
With
Thermal
Break
Reinforced
Vinyl/
Aluminum-Clad
Wood or Vinyl
Wood
Clad
Vinyl
Reinf
Single Glazing
glass
U-1.58
U-1.51
U-1.40
U-
acrylic/polycarb
U-1.52
U-1.45
U-1.34
U-
Double Glazing
air
U-1.05
U-0.89
U-0.84
U-
argon
U-1.02
U-0.86
U-0.80
U-
Double Glazing, e=0.20
air
U-0.96
U-0.80
U-0.75
U-
argon
U-0.91
U-0.75
U-0.70
U-
Double Glazing, e=0.10
air
U-0.94
U-0.79
U-0.74
U-
argon
U-0.89
U-0.73
U-0.68
U-
Double Glazing, e=0.05
air
U-0.93
U-0.78
U-0.73
U-
argon
U-0.87
U-0.71
U-0.66
U-
Triple Glazing
air
U-0.90
U-0.70
U-0.67
U-
argon
U-0.87
U-0.69
U-0.64
U-
Triple Glazing, e=0.20
air
U-0.86
U-0.68
U-0.63
U-
argon
U-0.82
U-0.63
U-0.59
U-
Triple Glazing, e=0.20 on 2 surfaces
air
U-0.82
U-0.64
U-0.60
U-
argon
U-0.79
U-0.60
U-0.56
U-
Triple Glazing, e=0.10 on 2 surfaces
air
U-0.81
U-0.62
U-0.58
U-
argon
U-0.77
U-0.58
U-0.54
U-
Quadruple Glazing, e=0.10 on 2 surfaces
air
U-0.78
U-0.59
U-0.55
U-
argon
U-0.74
U-0.56
U-0.52
U-
krypton
U-0.70
U-0.52
U-0.48
U-
Notes for Table R303.1.3(4) |
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a.
An alternative heating source sized at a maximum of 0.5 Watts/ft2 (equivalent) of heated floor area or 500 W
whichever is bigger, may be installed in the dwelling unit.
b.
See Section R401.1 and residential building in Section R202 for Group R-2 scope.
c.
Option 3.11 can only be taken with Options 3.1 and 3.3. To qualify to claim Option 3.11 with 3.3, the system
be a 1-2 speed heat pump system. Variable capacity heat pumps are ineligible from claiming this option.
d.
This option may only be claimed if serving System Type 4 or 5 from Table R406.2.
e.
Primary living areas include living, dining, kitchen, family rooms, and similar areas.
f.
Option 3.10 may one only be taken with Efficient Water Heating Option 5.1 or 5.2. Equipment sizing for spac
heating shall be calculated as provided in Section R403.7 with increased capacity to provide a minimum of 7
percent of peak hot water demand or shall be sized in accordance with approved manufacturer’s specificatio
or guidance. Supplementary heat for water heating shall be in accordance with Section R403.5.7. |
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R402.2 Specific insulation requirements. In addition to the requirements of Section R402.1, insulat
shall meet the specific requirements of Sections R402.2.1 through R402.2.10.
R402.2.1 Ceilings with attic spaces. Where Section R402.1.3 would require R-60 in the ceiling or
attic, installing R-49 over 100 percent of the ceiling area requiring insulation shall satisfy the
requirement for R-60 wherever the full height of uncompressed R-49 insulation extends over the wa
top plate at the eaves. This reduction shall not apply to the insulation and fenestration criteria in Se
R402.1.2 and the Total UA alternative in Section R402.1.5.
R402.2.1.1 Loose insulation in attic spaces. Open-blown or poured loose fill insulation may be
used in attic spaces where the slope of the ceiling is not more than 3 feet in 12 and there is at lea |
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CHAPTER 3 [RE]
GENERAL REQUIREMENTS
SECTION R301
CLIMATE ZONES
R301.1 General. Climate zones from Table R301.1 shall be used in determining the applicable
requirements from Chapter 4.
TABLE R301.1
CLIMATE ZONES, MOISTURE REGIMES,
AND WARM-HUMID DESIGNATIONS
BY STATE AND COUNTY
Key: A - Moist, B - Dry, C - Marine.
Absence of moisture designation indicates
moisture regime is irrelevant.
WASHINGTON |
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R103.4 Amended construction documents. Work shall be installed in accordance with the approve
construction documents, and any changes made during construction that are not in compliance with t
approved construction documents shall be resubmitted for approval as an amended set of constructio
documents.
R103.5 Retention of construction documents. One set of approved construction documents shall
retained by the code official for a period of not less than 180 days from date of completion of the
permitted work, or as required by state or local laws. |
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TABLE R405.4.2(1) (continued)
SPECIFICATIONS FOR THE STANDARD REFERENCE AND PROPOSED DESIGNS
BUILDING
COMPONENT
STANDARD REFERENCE DESIGN
PROPOSED DESIG
Service water
heatingd,e,f, g
The standard reference design shall be a heat pump
water heater meeting the efficiency standards of Table
C404.2 of chapter 51-11C WAC.
As proposed
Use, in units of gal/day – 25 + (8.5 x Nbr)
Where
Nbr = number of bedrooms
Use, in units of gal/day |
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SECTION R103
CONSTRUCTION DOCUMENTS
R103.1 General. Construction documents, technical reports, and other supporting data shall be subm
in one or more sets, or in a digital format where allowed by the code official, with each application for
permit. The construction documents and technical reports shall be prepared by a registered design
professional where required by the statutes of the jurisdiction in which the project is to be constructed
Where special conditions exist, the code official is authorized to require necessary construction
documents to be prepared by a registered design professional.
Exception: The code official is authorized to waive the requirements for construction documents or
other supporting data if the code official determines they are not necessary to confirm compliance
this code.
R103.2 Information on construction documents. Construction documents shall be drawn to scale
suitable material. Electronic media documents are permitted to be submitted when approved by the c
official. Construction documents shall be of sufficient clarity to indicate the location, nature and extent
the work proposed, and show in sufficient detail pertinent data and features of the building, systems a
equipment as herein governed. Details shall include, but are not limited to, the following as applicable |
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R403.9 Snow melt system controls. Snow and ice-melting systems, supplied through energy servic
the building, shall include automatic controls capable of shutting off the system when the pavement
temperature is above 50°F, and no precipitation is falling and an automatic or manual control that will
allow shutoff when the outdoor temperature is above 40°F.
R403.10 Energy consumption of pools and spas. The energy consumption of pools and permanen
spas shall be controlled by the requirements in Sections R403.10.1 through R403.10.4.2.
R403.10.1 Heaters. The electric power to heaters shall be controlled by an on-off switch that is an
integral part of the heater mounted on the exterior of the heater in a location with ready access, or
external to and within 3 feet (914 mm) of the heater. Operation of such switch shall not change the
settings of the heater thermostat. Such switches shall be in addition to a circuit breaker for the pow
the heater.
R403.10.2 Time switches. Time switches or other control method that can automatically turn off an
on heaters and pump motors according to a preset schedule shall be installed for heaters and pum
motors. Heaters and pump motors that have built in time switches shall be deemed in compliance
this requirement.
Exceptions: |
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those following. In the case of conflict between the duct sealing and insulation requirements of this co
and the duct insulation requirements of Sections 603 and 604 of the International Mechanical Code, t
duct insulation requirements of this code shall govern.
SECTION R109
STOP WORK ORDER
R109.1 Authority. Whenever the code official finds any work regulated by this code being performed
manner contrary to the provisions of this code or in a dangerous or unsafe manner, the code official i
authorized to issue a stop work order.
R109.2 Issuance. The stop work order shall be in writing and shall be given to the owner of the prop
involved, the owner's authorized agent, or the person performing the work. Upon issuance of a stop w
order, the cited work shall immediately cease. The stop work order shall state the reason for the orde
and the conditions under which the cited work is authorized to resume.
R109.3 Emergencies. Where an emergency exists, the code official shall not be required to give a
written notice prior to stopping the work.
R109.4 Failure to comply. Any person who shall continue any work after having been served with a
work order, except such work as that person is directed to perform to remove a violation or unsafe
condition, shall be subject fines established by the authority having jurisdiction. |
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R402.3.5 Combustion air openings. Where open combustion air ducts provide combustion air to
combustion, space conditioning fuel burning appliances, the appliances and combustion air openin
shall be located outside of the building thermal envelope, or enclosed in a room isolated from insid
thermal envelope. Such rooms shall be sealed and insulated in accordance with the envelope
requirements of Table R402.1.3, where the walls, floors and ceilings shall meet the minimum of the
below-grade wall R-value requirements. The door into the room shall be fully gasketed and any wat
lines and ducts in the room insulated in accordance with Section R403. The combustion air duct sh
be insulated where it passes through conditioned space to a minimum of R-8.
Exceptions: |
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SECTION R407
CERTIFIED PASSIVE HOUSE
R407.1 General. Projects shall comply with Section R407.2 or R407.3.
R407.2 Passive House Institute U.S. (PHIUS). Projects shall comply with PHIUS+ 2018 Passive
Building Standard, including its USDOE Energy Star and Zero Energy Ready Home co-requisites, an
performance calculations by PHIUS-approved software. Projects shall also comply with the provision
Table R405.2.
R407.2.1 PHIUS documentation. Prior to the issuance of a building permit, the following items mu
provided to the code official: |
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SECTION R503
ALTERATIONS
R503.1 General. Alterations to any building or structure shall comply with the requirements of the cod
for new construction, without requiring the unaltered portions of the existing building or building syste
comply with this code. Alterations shall be such that the existing building or structure is no less
conforming to the provisions of this code than the existing building or structure was prior to the alterat
Alterations shall not create an unsafe or hazardous condition or overload existing building systems.
Alterations shall be such that the existing building or structure uses no more energy than the existing
building or structure prior to the alteration. Alterations to existing buildings shall comply with Section
R503.1.1 through R503.1.4.
The code official may approve designs of alterations which do not fully conform to all of the
requirements of this code where in the opinion of the code official full compliance is physically imposs
and/or economically impractical and: |
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NEEP
Northeast Energy Efficiency Partnership, Inc. |
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HVI
Home Ventilating Institute |
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TABLE R303.1.3(5)
SMALL BUSINESS COMPLIANCE TABLE
DEFAULT U-FACTORS FOR VERTICAL FENESTRATION
a.
Low-eA (emissivity) shall be 0.24 to 0.16.
Low-eB (emissivity) shall be 0.15 to 0.08.
Low-eC (emissivity) shall be 0.07 or less.
b.
Aluminum Thermal Break = An aluminum thermal break framed window shall incorporate the foll
minimum design characteristics: |
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REROOFING. The process of recovering or replacing an existing roof covering. See “Roof recover” and
“Roof replacement.”
RESIDENTIAL BUILDING. For this code, the following building types are residential buildings: |
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R405.3.2.2 Compliance report for certificate of occupancy. A compliance report submitted for
obtaining the certificate of occupancy shall include all of the following: |
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Exception: Systems serving multiple dwelling units shall be inspected in accordance with Sectio
R105.2.4.
R105.2.5 Final inspection. The building shall have a final inspection and not be occupied until
approved.
R105.3 Reinspection. A building shall be reinspected when determined necessary by the code offici
R105.4 Approved inspection agencies. The code official is authorized to accept reports of third-par
inspection agencies not affiliated with the building design or construction, provided such agencies are
approved as to qualifications and reliability relevant to the building components and systems they are
inspecting.
R105.5 Inspection requests. It shall be the duty of the holder of the permit or their duly authorized a
to notify the code official when work is ready for inspection. It shall be the duty of the permit holder to
provide access to and means for inspections of such work that are required by this code.
R105.6 Reinspection and testing. Where any work or installation does not pass an initial test or
inspection, the necessary corrections shall be made so as to achieve compliance with this code. The
work or installation shall then be resubmitted to the code official for inspection and testing. |
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certified by the manufacturer. Products lacking such a labeled SHGC or VT shall be assigned a def
SHGC or VT from Table R303.1.3(3).
Exceptions: |
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R403.1.2 Heat pump supplementary heat. Unitary air cooled heat pumps shall include controls th
minimize supplemental heat usage during start-up, set-up, and defrost conditions. These controls s
anticipate need for heat and use compression heating as the first stage of heat. Controls shall indic
when supplemental heating is being used through visual means (e.g., LED indicators). Heat pumps
equipped with supplementary heaters shall be installed with controls that prevent supplemental hea
operation above 40°F. At final inspection the auxiliary heat lock out control shall be set to 35°F or le
R403.1.3 Continuously burning pilot lights. The natural gas systems and equipment listed bel
are not permitted to be equipped with continuously burning pilot lights. |
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CHAPTER 2 [RE]
DEFINITIONS
SECTION R201
GENERAL
R201.1 Scope. Unless stated otherwise, the following words and terms in this code shall have the
meanings indicated in this chapter.
R201.2 Interchangeability. Words used in the present tense include the future; words in the masculi
gender include the feminine and neuter; the singular number includes the plural and the plural include
the singular.
R201.3 Terms defined in other codes. Terms that are not defined in this code but are defined in the
International Building Code, International Fire Code, International Fuel Gas Code, International
Mechanical Code, Uniform Plumbing Code or the International Residential Code shall have the mean
ascribed to them in those codes.
R201.4 Terms not defined. Terms not defined by this chapter shall have ordinarily accepted meanin
such as the context implies. |
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CHAPTER 6
REFERENCED STANDARDS
This chapter lists the standards that are referenced in various sections of this document. The standar
are listed herein by the promulgating agency of the standard, the standard identification, the effective
and title, and the section or sections of this document that reference the standard. The application of t
referenced standards shall be as specified in Section R106.
AAMA
American Architectural Manufacturers Association |
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R402.4.2 Air leakage of fenestration. Windows, skylights and sliding glass doors shall have an air
infiltration rate of no more than 0.3 cfm per square foot (1.5 L/s/m2), and swinging doors no more th |
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SECTION R402
BUILDING THERMAL ENVELOPE
R402.1 General. The building thermal envelope shall meet the requirements of Sections R402.1.1
through R402.1.6.
Exception: The following buildings, or portions thereof, separated from the remainder of the buildin
building thermal envelope assemblies complying with this code shall be exempt from the building
thermal envelope provisions of this code: |
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SECTION R406
ADDITIONAL ENERGY EFFICIENCY REQUIREMENTS
R406.1 Scope. This section establishes additional energy efficiency requirements for all new constru
covered by this code, including additions subject to Section R502 and change of occupancy or use
subject to Section R505 unless specifically exempted in Section R406. Credit from both Sections R40
and R406.3 are required.
R406.2 Carbon emission equalization. This section establishes a base equalization between fuels
to define the equivalent carbon emissions of the options specified. The permit shall define the base fu
selection to be used and the points specified in Table R406.2 shall be used to modify the requirement
Section R406.3.
TABLE R406.2
ENERGY EQUALIZATION CREDITS
a. See Section R401.1 and residential building in Section R202 for Group R-2 scope.
b. The gas back-up furnace will operate as fan-only when the heat pump is operating. T
heat pump shall operate at all temperatures above 38°F (3.3°C) (or lower). Below tha
“changeover” temperature, the heat pump would not operate to provide space heatin
The gas furnace provides heating below 38°F (3.3°C) (or lower).
c. Additional points for the HVAC system are included in Table R406.3. |
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SECTION R302
DESIGN CONDITIONS
R302.1 Interior design conditions. The interior design temperatures used for heating and cooling lo
calculations shall be a maximum of 72°F (22°C) for heating and minimum of 75°F (24°C) for cooling.
R302.2 Exterior design conditions. The heating or cooling outdoor design temperatures shall be
selected from Appendix RC. |
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TABLE R406.3 (continued)
ENERGY CREDITS
OPTION
DESCRIPTION
CREDIT(S)
All Other
Group R |
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R406.3 Additional energy efficiency requirements. Each dwelling unit in a residential building shal
comply with sufficient options from Tables R406.2 and R406.3 so as to achieve the following minimu
number of credits: |
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R402.1.5 Total UA alternative. If the proposed building thermal envelope UA is less than or equal
the target UA, the building shall be considered in compliance with Table R402.1.2. The proposed U
shall be calculated in accordance with Equation 2. The target UA shall be calculated in accordance
Equation 1. U-factors shall be determined as specified in Section R402.1.6. In addition to UA
compliance, the maximum fenestration U-factors of Section R402.5 shall be met.
R402.1.6 U-factor reference and calculations. The U-factors for typical construction assemblies
included in Appendix A in chapter 51-11C WAC. These values shall be used for all calculations. W
proposed construction assemblies are not represented in Appendix A, values shall be calculated in
accordance with the ASHRAE Handbook of Fundamentals using the framing factors listed in Appen
A where applicable and shall include the thermal bridging effects of framing materials. The SHGC
requirements shall be met in addition to UA compliance. Fenestration U-factors shall comply with
Section R303.1.3, Fenestration product rating.
EQUATION 1 — GROUP R OCCUPANCY
TARGET UA
UAT = UWAW + UBGWABGW + UVGAVG + UOGAOG + UFAF + URCARC +UDAD + FSPS+ FBGSPBGS
Where:
UAT
=
the target combined thermal transmittance of the gross exterior wall, floor and roof/ceiling
UW
=
the thermal transmittance value of the opaque above grade wall found in Table R402.1.2. |
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maintenance systems shall be considered to be sources of heated water. The volume in the piping
be determined from Table C404.3.1 in the Washington State Energy Code, Commercial Provisions
Table L502.7 of the Uniform Plumbing Code. The volume contained within fixture shutoff valves, wit
flexible water supply connectors to a fixture fitting and within a fixture fitting shall not be included in
water volume determination. Where heated water is supplied by a recirculating system or heat-trac
piping, the volume shall include the portion of the fitting on the branch pipe that supplies water to th
fixture.
R403.5.3 Hot water pipe insulation. Insulation for service hot water pipe, both within and outside t
conditioned space, shall have a minimum thermal resistance (R-value) of R-3.
Exception: Pipe insulation is permitted to be discontinuous where it passes through studs, joists
other structural members and where the insulated pipes pass other piping, conduit or vents, provi
the insulation is installed tight to each obstruction.
R403.5.4 Drain water heat recovery units. Drain water heat recovery units shall comply with CSA |
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BELOW-GRADE WALL. That portion of a wall in the building envelope that is entirely below the finish gra
and in contact with the ground.
BUILDING. Any structure used or intended for supporting or sheltering any use or occupancy, including
mechanical systems, service water heating systems and electric power and lighting systems located
the building site and supporting the building.
BUILDING SITE. A contiguous area of land that is under the ownership or control of one entity.
BUILDING THERMAL ENVELOPE. The below-grade walls, above-grade walls, floors, ceiling, roofs, and an
other building element assemblies that enclose conditioned space or provide a boundary between
conditioned space and exempt or unconditioned space.
C-FACTOR (THERMAL CONDUCTANCE). The coefficient of heat transmission (surface to surface) through
building component or assembly, equal to the time rate of heat flow per unit area and the unit temper
difference between the warm side and cold side surfaces (Btu/h ft2 × °F) [W/(m2 × K)].
CAVITY INSULATION. Insulating material located between framing members.
CIRCULATING HOT WATER SYSTEM. A specifically designed water distribution system where one or more
pumps are operated in the service hot water piping to circulate heated water from the water-heating
equipment to the fixture supply and back to the water-heating equipment.
CLIMATE ZONE. A geographical region based on climatic criteria as specified in this code.
CODE OFFICIAL |
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TABLE R406.3 (continued)
ENERGY CREDITS
OPTION
DESCRIPTION
CREDIT(S)
All Other
Group R |
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SECTION R405
TOTAL BUILDING PERFORMANCE
R405.1 Scope. This section establishes criteria for compliance using total building performance analy
Such analysis shall include heating, cooling, mechanical ventilation and service water-heating energy
only.
R405.2 Performance-based compliance. Compliance based on total building performance requires
a proposed design meet all of the following: |
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APPENDIX RC
EXTERIOR DESIGN CONDITIONS
As required by Sections C302.2 and R302.2, the heating or cooling outdoor design temperatures shall be selected
Table C-1.
TABLE C-1
OUTDOOR DESIGN TEMPERATURES |
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R503.1.4 Lighting. New lighting systems that are part of the alteration shall comply with Section
R404.1.
Exception: Alterations that replace less than 10 percent of the luminaires in a space, provided th
such alterations do not increase the installed interior lighting power.
SECTION R504
REPAIRS
R504.1 General. Buildings, structures and parts thereof shall be repaired in compliance with Section
R501.3 and this section. Work on nondamaged components that is necessary for the required repair
damaged components shall be considered part of the repair and shall not be subject to the requireme
for alterations in this chapter. Routine maintenance required by Section R501.3, ordinary repairs exe
from permit, and abatement of wear due to normal service conditions shall not be subject to the
requirements for repairs in this section.
The code official may approve designs of repairs which do not fully conform with all of the requireme
of this code where in the opinion of the code official full compliance is physically impossible and/or
economically impractical and: |
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2021 Washington State Energy Code
CHAPTER 4 [RE]
RESIDENTIAL ENERGY EFFICIENCY
SECTION R401
GENERAL
R401.1 Scope. This chapter applies to residential buildings. Group R-2 occupancy areas with dwellin
units accessed from enclosed interior corridors or other enclosed interior spaces must comply with th
Washington State Energy Code (WSEC), Commercial Provisions. Other Group R-2 occupancy areas
permitted to comply with the WSEC, Commercial Provisions, in lieu of the WSEC, Residential Provisi
Exception: Water heaters that each serve only an individual Group R-2 dwelling unit in a building t
stories or less above grade plane are permitted to comply with the requirements of the WSEC,
Residential Provisions.
R401.2 Compliance. Projects shall comply with one of the following: |
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SECTION R303
MATERIALS, SYSTEMS AND EQUIPMENT
R303.1 Identification. Materials, systems and equipment shall be identified in a manner that will allo
determination of compliance with the applicable provisions of this code.
R303.1.1 Building thermal envelope insulation. An R-value identification mark shall be applied b
the manufacturer to each piece of building thermal envelope insulation 12 inches (305 mm) or great
width. Alternately, the insulation installers shall provide a certification listing the type, manufacturer
R-value of insulation installed in each element of the building thermal envelope. For blown or spray
insulation (fiberglass and cellulose), the initial installed thickness, settled thickness, settled R-value,
installed density, coverage area and number of bags installed shall be listed on the certification. Fo
sprayed polyurethane foam (SPF) insulation, the installed thickness of the areas covered and R-val
of installed thickness shall be listed on the certification. For insulated siding, the R-value shall be
labeled on the product’s package and shall be listed on the certification. The insulation installer shal
sign, date and post the certification in a conspicuous location on the job site.
Exception: For roof insulation installed above the deck, the R-value shall be labeled as required
the material standards specified in Table 1508.2 of the International Building Code or Table R906
the International Residential Code.
R303.1.1.1 Blown or sprayed roof/c |
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ype of construction whose primary structural elements are formed by a system of l
LOG WALL. An assembly of individual structural logs for use as an exterior or interior load bearing wall,
shear wall or nonload bearing wall.
LOW-VOLTAGE LIGHTING. A lighting system consisting of an isolating power supply, the low voltage
luminaires, and associated equipment that are all identified for the use. The output circuits of the pow
supply operate at 30 volts (42.4 volts peak) or less under all load conditions.
MANUAL. Capable of being operated by personal intervention (see "Automatic").
OCCUPANT SENSOR CONTROL. An automatic control device that detects the presence or absence of pe
within an area and causes lighting, equipment or appliances to be regulated accordingly.
ON-SITE RENEWABLE ENERGY. Energy from renewable energy resources harvested at the building site.
OPAQUE DOOR. A door that is not less than 50 percent opaque in surface area.
PILOT LIGHT, CONTINUOUSLY BURNING. A small gas flame used to ignite gas at a larger burning. Once lit
continuously burning pilot light remains in operation until manually interrupted. Pilot light ignition syste
with the ability to switch between intermittent and continuous mode are considered continuous.
PILOT LIGHT, INTERMITTENT. A pilot which is automatically ignited when an appliance is called on to ope
and which remains continuously ignited during each period of main burner operation. The pilot is
automatically extinguished when each main |
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. The officer or other designated authority charged with the administration and enforce
of this code, or a duly authorized representative.
COMMERCIAL BUILDING. For this code, all buildings that are not included in the definition of "Residential
buildings."
CONDITIONED FLOOR AREA. The horizontal projection of the floors associated with the conditioned spac
CONDITIONED SPACE. An area, room or space that is enclosed within the building thermal envelope and
that is directly or indirectly heated or cooled. Spaces are indirectly heated or cooled where they
communicate through openings with conditioned spaces, where they are separated from conditioned
spaces by uninsulated walls, floors or ceilings, or where they contain uninsulated ducts, piping or oth
sources of heating or cooling.
CONNECTED THERMOSTAT. An internet enabled device that automatically adjusts heating and cooling
temperature settings.
CONTINUOUS AIR BARRIER. A combination of materials and assemblies that restrict or prevent the pass
of air through the building thermal envelope.
CONTINUOUS INSULATION (c.i.). Insulating material that is continuous across all structural members wit
thermal bridges other than fasteners and service openings. It is installed on the interior or exterior or i
integral to any opaque surface of the building envelope.
CURTAIN WALL. Fenestration products used to create an external nonload-bearing wall that is designe
separate the exterior and interior environments.
DEMAND RECIRCULATION |
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SECTION R101
SCOPE AND GENERAL REQUIREMENTS
R101.1 Title. This code shall be known as the Washington State Energy Code-Residential, and shall
cited as such. It is referred to herein as "this code."
The 2021 edition of the Washington State Energy Code is hereby adopted. The Washington State
Energy Code adopted under chapter 51-11R WAC shall become effective in all counties and cities of
state on March 15, 2024
R101.2 Scope. This code applies to residential buildings and the buildings sites and associated syste
and equipment. This code shall be the maximum and minimum energy code for residential constructi
each town, city and county. Residential sleeping units, Group I-1, Condition 2 assisted living facilities
licensed by Washington state under chapter 388-78A WAC and Group I-1, Condition 2 residential
treatment facilities licensed by Washington state under chapter 246-337 WAC shall utilize the comme
building sections of the energy code regardless of the number of stories of height above grade plane.
R101.3 Intent. This code shall regulate the design and construction of buildings for the effective use
conservation of energy over the useful life of each building. This code is intended to provide flexibility
permit the use of innovative approaches and techniques to achieve this objective. This code is not
intended to abridge safety, health or environmental requirements contained in other applicable codes
ordinances.
R101.4 Applicability. Where, in any specific case, |
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Rim Joists
Rim joists shall include an exterior air
barrierb.
The junctions of the rim board to the sill
plate and the rimboard and the subfloor
shall be air sealed.
Rim joists shall be insulated so tha
the insulation maintains permanen
contact with the exterior rim board
Floors (including above
garage and cantilevered
floors)
The air barrier shall be installed at any
exposed edge of insulation.
Floor framing cavity insulation shal
be installed to maintain permanent
contact with the underside of subfl
decking or floor framing cavity
insulation shall be permitted to be
contact with the topside of sheathi
or continuous insulation installed o
the underside of floor framing and
extend from the bottom to the top
all perimeter floor framing member
Basement, crawl space and
slab foundations
Exposed earth in unvented crawl spaces
shall be covered with a Class I, black
vapor retarder with overlapping joints
taped.
Penetrations through concrete foundation
walls and slabs shall be air sealed.
Class I vapor retarders shall not be used
as an air barrier on below-grade walls and
shall be installed in accordance with
Section R702.7 of the International
Residential Code.
Crawl space insulation, where
provided instead of floor insulation
shall be installed in accordance wi
Section R402.2.10.
Conditioned basement foundation
wall insulation shall be installed in
accordance with Section R402.2.8
Slab on grade floor insulation shall
installed in accordance with Sec |
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NOTE: Below Grade Walls: The wall is assumed to extend from the slab upward to the top of the mud sill for the
distance specified in Table A104.1, with 6 inches of concrete wall extending above grade. This will be calculated
separately from above grade walls using the wall height that best describes the system. |
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additional mass
specifically designed a
thermal storage eleme
but not integral to the
building envelope or
structure.
Structural mass
For masonry floor slabs, 80% of floor area covered by R-2
carpet and pad, and 20% of floor directly exposed to room
air.
As proposed
For masonry basement walls, as proposed, but with
insulation required by Table R402.1.2 located on the
interior side of the walls.
As proposed
For other walls, for ceilings, floors, and interior walls,
wood frame construction.
As proposed
Heating systemsd, e
The standard reference design shall be an air source heat
pump meeting the requirements of Section C403 of the
WSEC—Commercial Provisions.
Capacity: Sized in accordance with Section R403.7
As proposed
Cooling systemsd, f
Same system type as proposed. Same system efficiency
as required by prevailing minimum federal standard.
Capacity: Sized in accordance with Section R403.6.
As proposed |
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Concealed sprinklers
When required to be sealed, concealed
fire sprinklers shall only be sealed in a
manner that is recommended by the
manufacturer. Caulking or other adhesive
sealants shall not be used to fill voids
between fire sprinkler cover plates and
walls or ceilings.
IC = insulation contact
a.
In addition, inspection of log walls shall be in accordance with the provisions of ICC-400.
b.
Air barrier and insulation full enclosure is not required in unconditioned/ventilated attic spaces. |
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rmal boundary wall is any wall that separates conditioned space from unconditioned space
ambient conditions.
Above-grade thermal boundary wall is any thermal boundary wall component not in contact wit
Below-grade boundary wall is any thermal boundary wall in soil contact.
Common wall area is the area of walls shared with an adjoining dwelling unit.
L and CFA are in the same units.
i.
The factor for the compactness of the hot water distribution system is the ratio of the area of the rectang
that bounds the source of hot water and the fixtures that it serves (the “hot water rectangle”) divided by t
floor area of the dwelling. |
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AW
=
opaque above grade wall area.
UBGW
=
the thermal transmittance value of the below grade opaque wall found in Table R402.1.2.
ABGW
=
opaque below grade wall area.
UVG
=
the thermal transmittance value of the fenestration found in Table R402.1.2.
AVG
=
(a) The proposed glazing area; where proposed fenestration glazing area is less than 15
the conditioned floor area, minus AOG.
(b) 15% of the conditioned floor area; where the proposed fenestration glazing area is 15
more of the conditioned floor area, minus AOG.
UOG
=
the thermal transmittance value of the skylight glazing found in Table R402.1.2.
AOG
=
skylight glazing area (if the proposed AOG exceeds 15 percent, the target AOG shall be 1
percent of the total floor area of the conditioned space).
UF
=
the thermal transmittance value of the floor found in Table R402.1.2.
AF
=
floor area over unconditioned space.
URC
=
the thermal transmittance value of the ceiling found in Table R402.1.2.
ARC
=
roof/ceiling area.
UD
=
the thermal transmittance value of the fenestration found in Table R402.1.2.
AD
=
opaque door area.
FS
=
concrete slab on grade component F-factor found in Table R402.1.2.
PS
=
lineal ft. of concrete slab on grade perimeter.
FBGS
=
concrete below grade slab component F-factor found in Table R402.1.2.
PBGS
=
lineal ft. of concrete below grade slab perimeter. |
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SECTION R106
NOTICE OF APPROVAL
R106.1 Approval. After the prescribed tests and inspections indicate that the work complies in all
respects with this code, a notice of approval shall be issued by the code official.
R106.2 Revocation. The code official is authorized to, in writing, suspend or revoke a notice of appro
issued under the provisions of this code wherever the certificate is issued in error, or on the basis of
incorrect information supplied, or where it is determined that the building or structure, premise, or port
thereof is in violation of any ordinance or regulation or any of the provisions of this code.
SECTION R107
VALIDITY
R107.1 General. If a portion of this code is held to be illegal or void, such a decision shall not affect t
validity of the remainder of this code. |
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SECTION R202
GENERAL DEFINITIONS
ABOVE-GRADE WALL. A wall enclosing conditioned space that is not a below-grade wall. This includes
between-floor spandrels, peripheral edges of floors, roof and basement knee walls, dormer walls, gab
end walls, walls enclosing a mansard roof and skylight shafts.
ACCESS (TO). That which enables a device, appliance or equipment to be reached by ready access or
means that first requires the removal or movement of a panel or similar obstruction.
ADDITION. An extension or increase in the conditioned space floor area, number of stories, or height of
building or structure.
ADVANCED FRAMED WALLS. Studs framed on 24-inch centers with double top plate and single bottom p
Corners use two studs or other means of fully insulating corners, and one stud is used to support eac
header. Headers consist of double 2x material with R-10 insulation between the header and exterior
sheathing. Interior partition wall/exterior wall intersections are fully insulated in the exterior wall. (See
Standard Framing and Appendix CA, of chapter 51-11C WAC.)
AIR BARRIER. One or more materials joined together in a continuous manner to restrict or prevent the
passage of air through the building thermal envelope and its assemblies.
ALTERATION. Any construction, retrofit or renovation to an existing structure other than repair or additio
Also, a change in a building, electrical, gas, mechanical or plumbing system that involves an extensio
addition or change to the arrang |
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TABLE R405.4.2(1)
SPECIFICATIONS FOR THE STANDARD REFERENCE AND PROPOSED DESIGNS
BUILDING
COMPONENT
STANDARD REFERENCE DESIGN
PROPOSED DESIG
Above-grade walls
Type: Mass wall if proposed wall is mass; otherwise
wood frame.
As proposed
Gross area: Same as proposed
As proposed
U-factor: From Table R402.1.2
As proposed
Solar absorptance = 0.75
As proposed
Emittance = 0.90
As proposed
Below-grade walls
Type: Same as proposed
As proposed
Gross area: Same as proposed
As proposed
U-factor: From Table R402.1.2, with insulation layer on
interior side of walls.
As proposed
Above-grade floors
Type: Wood frame
As proposed
Gross area: Same as proposed
As proposed
U-factor: From Table R402.1.2
As proposed
Ceilings
Type: Wood frame
As proposed
Gross area: Same as proposed
As proposed
U-factor: From Table R402.1.2
As proposed
Roofs
Type: Composition shingle on wood sheathing
As proposed
Gross area: Same as proposed
As proposed
Solar absorptance = 0.75
As proposed
Emittance = 0.90
As proposed
Attics
Type: Vented with aperture = 1 ft2 per 300 ft2 ceiling area As proposed
Foundations
Type: Same as proposed foundation wall area above and
below-grade
As proposed
Soil characteristics: Same as proposed.
As proposed
Opaque Doors
Area: 40 ft2
As proposed
Orientation: North
As proposed
U-factor: Same as fenestration from Table R402.1.2.
As proposed
Vertical fenestration
other than opaque
doorsa
Total ar |
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R403.6.2 Testing. Mechanical ventilation systems shall be tested and verified to provide the minim
ventilation flow rates required by Section R403.6. Testing shall be performed according to the
ventilation equipment manufacturer's instructions, or by using a flow hood or box, flow grid, or other
airflow measuring device at the mechanical ventilation fan's inlet terminals or grilles, outlet terminal
grilles, or in the connected ventilation ducts. Where required by the code official, testing shall be
conducted by an approved third party. A written report of the results of the test shall be signed by th
party conducting the test and provided to the code official.
Exception: Kitchen range hoods that are ducted to the outside with 6-inch (152 mm) or larger du
and not more than one 90-degree (1.57 rad) elbow or equivalent in the duct run
R403.7 Equipment sizing and efficiency rating. Heating and cooling equipment shall be sized in
accordance with ACCA Manual S based on building loads calculated in accordance with ACCA Manu
or other approved heating and cooling calculation methodologies. The output capacity of heating and
cooling equipment shall not be greater than that of the smallest available equipment size that exceed
loads calculated, including allowable oversizing limits. Equipment shall meet the minimum federal
efficiency standards as referenced in Tables C403.3.2(1), C403.3.2(2), C403.3.2(3), C403.3.2(4),
C403.3.2(5), C403.3.2(6), C403.3.2(7), C403.3.2(8) and C403.3. |
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SECTION R110
MEANS OF APPEALS
R110.1 General. In order to hear and decide appeals of orders, decisions or determinations made by
code official relative to the application and interpretation of this code, there shall be and is hereby cre
a board of appeals. The board of appeals shall be appointed by the applicable governing authority an
shall hold office at its pleasure. The board shall adopt rules of procedure for conducting its business,
shall render all decisions and findings in writing to the appellant with a duplicate copy to the code offic
R110.2 Limitations on authority. An application for appeal shall be based on a claim that the true in
of this code or the rules legally adopted thereunder have been incorrectly interpreted, the provisions
this code do not fully apply or an equivalent or better form of construction is proposed. The board sha
have no authority to waive requirements of this code or interpret the administration of this code.
R110.3 Qualifications. The board of appeals shall consist of members who are qualified by experien
and training and are not employees of the jurisdiction.
R110.4 Administration. The code official shall take immediate action in accordance with the decision
the board. |
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SECTION R501
GENERAL
R501.1 Scope. The provisions of this chapter shall control the alteration, repair, addition and change
occupancy of existing buildings and structures.
R501.1.1 General. Except as specified in this chapter, this code shall not be used to require the remo
alteration or abandonment of, nor prevent the continued use and maintenance of, an existing building
building system lawfully in existence at the time of adoption of this code. Unaltered portions of the exi
building or building supply system shall not be required to comply with this code.
R501.1.2 Thermostats for accessory dwelling units. Where a separate dwelling unit, that provid
independent facilities for living, sleeping, cooking, bathing and sanitation, is established within or
attached to an existing dwelling unit, the heating and cooling for the newly-created dwelling unit sha
controllable with a separate programmable thermostat in accordance with Section R403.1.1.
R501.2 Compliance. Additions, alterations, repairs or changes of occupancy to, or relocation of, an
existing building, building system or portion thereof shall comply with Sections R502, R503, R504 or
R505, respectively, in this code. Changes where unconditioned space is changed to conditioned spac
shall comply with Section R502.
R501.3 Maintenance. Buildings and structures, and parts thereof, shall be maintained in a safe and
sanitary condition. Devices and systems that are required by this code shall be maintained in
conf |
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R402.1.3 R-value alternative. Assemblies with R-value of insulation materials equal to or greater t
that specified in Table R402.1.3 shall be an alternative to the U-factor in Table R402.1.2.
R402.1.4 R-value computation. Cavity insulation alone shall be used to determine compliance wit
cavity insulation R-value requirements in Table R402.1.3. Where cavity insulation is installed in
multiple layers, the R-values of the cavity insulation layers shall be summed to determine complian
with the cavity insulation R-value requirements. The manufacturer's settled R-value shall be used f
blown-in insulation. Continuous insulation (ci) alone shall be used to determine compliance with the
continuous insulation R-value requirements in Table R402.1.3. Where continuous insulation is insta
in multiple layers, the R-values of the continuous insulation layers shall be summed to determine
compliance with the continuous insulation R-value requirements. Cavity insulation R-values shall n
used to determine compliance with the continuous insulation R-value requirements in Table R402.1
Computed R-values shall not include an R-value for other building materials or air films. Where
insulated siding is used for the purpose of complying with the continuous insulation requirements of
Table R402.1.3, the manufacturer’s labeled R-value for insulated siding shall be reduced by R-0.6.
TABLE R402.1.3
INSULATION MINIMUM R-VALUES AND FENESTRATION REQUIREMENTS BY COMPONENT
a.
R-values are minimums. U-fa |
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SECTION R104
FEES
R104.1 Fees. A permit shall not be issued until the fees prescribed in Section R104.2 have been paid
nor shall an amendment to a permit be released until the additional fee, if any, has been paid.
R104.2 Schedule of permit fees. A fee for each permit shall be paid as required, in accordance with
schedule as established by the applicable governing authority.
R104.3 Work commencing before permit issuance. Any person who commences any work before
obtaining the necessary permits shall be subject to an additional fee established by the code official,
which shall be in addition to the required permit fees.
R104.4 Related fees. The payment of the fee for the construction, alteration, removal or demolition o
work done in connection to or concurrently with the work or activity authorized by a permit shall not
relieve the applicant or holder of the permit from the payment of other fees that are prescribed by law.
R104.5 Refunds. The code official is authorized to establish a refund policy. |
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y similar so that desired conditions can be maintained throughout using a single controlling
device. |
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SECTION R502
ADDITIONS
R502.1 General. Additions to an existing building, building system or portion thereof shall conform to
provisions of this code as those provisions relate to new construction without requiring the unaltered
portion of the existing building or building system to comply with this code, except as specified in this
chapter. Additions shall not create an unsafe or hazardous condition or overload existing building
systems. An addition shall be deemed to comply with this code where the addition alone complies, w
the existing building and addition comply with this code as a single building, or where the building wit
addition uses no more energy than the existing building. Additions shall be in accordance with Sectio
R502.3 or R502.4.
R502.1.1 Small additions. Additions not greater than 150 square feet (13.9 m2) shall not be requir
comply with Section R406.
R502.2 Change in space conditioning. Any nonconditioned or low-energy space that is altered to
become conditioned space shall be required to be brought into full compliance with this code.
Exception: Where the total building performance option in Section R405 is used to comply with thi
section, the annual energy use of the proposed design is permitted to be 110 percent of the annual
energy use otherwise allowed by Section R405.3.
R502.3 Prescriptive compliance. Additions shall comply with Sections R502.3.1 through R502.3.4.
R502.3.1 Building envelope. New building envelope assemblies that are |
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DUCTLESS MINI-SPLIT HEAT PUMP SYSTEM. A heating and cooling system that is comprised of one or mul
indoor evaporator/air-handling units and an outdoor condensing unit that is connected by refrigerant
piping and electrical wiring. A ductless mini-split system is capable of cooling or heating one or more
rooms without the use of a central ductwork system.
DWELLING UNIT. A single unit providing complete independent living facilities for one or more persons,
including permanent provisions for living, sleeping, eating, cooking and sanitation.
DWELLING UNIT ENCLOSURE AREA. The sum of the area of ceiling, floors and walls separating a dwellin
unit’s conditioned space from the exterior or from adjacent conditioned or unconditioned spaces. Wall
height shall be measured from the finished floor of the dwelling unit to the underside of the floor abov
ENERGY ANALYSIS. A method for estimating the annual energy use of the proposed design and standa
reference design based on estimates of energy use.
ENERGY COST. The total estimated annual cost for purchased energy for the building functions regulat
by this code, including applicable demand charges.
ENERGY SIMULATION TOOL. An approved software program or calculation-based methodology that proj
the annual energy use of a building.
EXTERIOR WALL. Walls including both above-grade walls and below-grade walls.
FENESTRATION. Products classified as either vertical fenestration or skylights.
VERTICAL FENESTRATION. Windows (fixed or operable |
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SECTION R105
INSPECTIONS
R105.1 General. Construction or work for which a permit is required shall be subject to inspection by
code official or his or her designated agent, and such construction or work shall remain visible and ab
be accessed for inspection purposes until approved. It shall be the duty of the permit applicant to cau
the work to remain visible and able to be accessed for inspection purposes. Neither the code official n
the jurisdiction shall be liable for expense entailed in the removal or replacement of any material, pro
system or building component required to allow inspection to validate compliance with this code.
R105.2 Required inspections. The code official or his or her designated agent, upon notification, sh
make the inspections set forth in Sections R105.2.1 through R105.2.5.
R105.2.1 Footing and foundation inspection. Inspections associated with footings and foundatio
shall verify compliance with the code as to R-value, location, thickness, depth of burial and protecti
insulation as required by the code and approved plans and specifications.
R105.2.2 Framing and rough-in inspection. Inspections at framing and rough-in shall be made b
application of interior finish and shall verify compliance with the code as to types of insulation and
corresponding R-values and their correct location and proper installation; fenestration properties (U
factor and SHCG) and proper installation; and air leakage controls as required by the code and
approved plans |
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part of the addition shall
comply with Sections R402.1, R402.2, R402.3.1 through R402.3.5, and R402.4.
Exception: Where nonconditioned space is changed to conditioned space, the building envelope
the addition shall comply where the UA, as determined in Section R402.1.5, of the existing buildin
and the addition, and any alterations that are part of the project, is less than or equal to the UA
generated for the existing building.
R502.3.1.1 Existing ceilings with attic spaces. Where an addition greater than 150 square feet
(13.9 m2) adjoins existing ceilings with attic spaces, the existing attic spaces shall comply with
Section R402.
R502.3.2 Heating and cooling systems. HVAC ducts newly installed as part of an addition shall
comply with Section R403.
Exception: The following need not comply with the testing requirements of Section R403.3.3: |
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SECTION R111
VIOLATIONS
It shall be unlawful for any person, firm, or corporation to erect or construct any building, or remodel o
rehabilitate any existing building or structure in the state, or allow the same to be done, contrary to or
violation of any of the provisions of this code.
SECTION R112
LIABILITY
Nothing contained in this code is intended to be nor shall be construed to create or form the basis for
liability on the part of any city or county or its officers, employees or agents for any injury or damage
resulting from the failure of a building to conform to the provisions of this code. |
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SECTION R108
REFERENCED STANDARDS
R108.1 Referenced codes and standards. The codes and standards referenced in this code shall b
those listed in Chapter 5, and such codes and standards shall be considered as part of the requireme
of this code to the prescribed extent of each such reference and as further regulated in Sections R10
and R108.1.2.
R108.1.1 Conflicts. Where differences occur between provisions of this code and referenced code
and standards, the provisions of this code shall apply.
R108.1.2 Provisions in referenced codes and standards. Where the extent of the reference to a
referenced code or standard includes subject matter that is within the scope of this code, the provisi
of this code, as applicable, shall take precedence over the provisions in the referenced code or
standard.
R108.2 Application of references. References to chapter or section numbers, or to provisions not
specifically identified by number, shall be construed to refer to such chapter, section or provision of th
code.
R108.3 Other laws. The provisions of this code shall not be deemed to nullify any provisions of local,
state or federal law. In addition to the requirements of this code, all occupancies shall conform to the
provisions included in the state building code (chapter 19.27 RCW). In case of conflicts among code
enumerated in RCW 19.27.031 (1) through (4) and this code, an earlier named code shall govern ove |
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eah =
(a) The proposed glazing area; where proposed glazing
area is less than 15% of the conditioned floor area.
(b) 15% of the conditioned floor area; where the proposed
glazing area is 15% or more of the conditioned floor area.
As proposed
Orientation: Equally distributed to four cardinal compass
orientations (N, E, S & W).
As proposed
U-factor: From Table R402.1.2
As proposed
SHGC: From Table R402.1.3 except that for climates with
no requirement (NR) SHGC = 0.40 shall be used.
As proposed
Interior shade fraction: 0.92 - (0.21 × SHGC for the
standard reference design)
External shading: None |
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burner operating cycle is completed.
PILOT LIGHT, INTERRUPTED. A pilot which is automatically ignited prior to the admission of fuel to the m
burner and which is automatically extinguished after the main flame is established.
PILOT LIGHT, ON-DEMAND. A pilot which, once placed into operation, is intended to remain ignited for a
predetermined period of time following an automatic or manual operation of the main burner gas valv
PROPOSED DESIGN. A description of the proposed building used to estimate annual energy use for
determining compliance based on total building performance.
READY ACCESS (TO). That which enables a device, appliance or equipment to be directly reached witho
requiring the removal or movement of any panel or similar obstruction.
RENEWABLE ENERGY CERTIFICATE (REC). An instrument that represents the environmental attributes of
megawatt hour of renewable energy; also known as an energy attribute certificate (EAC).
RENEWABLE ENERGY RESOURCES. Energy derived from solar radiation, wind, waves, tides, landfill gas,
biogas, biomass or extracted from hot fluid or steam heated within the earth.
REPAIR. The reconstruction or renewal of any part of an existing building for the purpose of its
maintenance or to correct damage. |
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R402.4.1.3 Leakage rate. Detached one- and two-family dwellings and multiple single-family
dwellings (townhouses) shall comply with Section R402.4.1.3.1. Group R-2 multifamily buildings s
comply with Section R402.4.1.3.2.
R402.4.1.3.1 Dwelling unit leakage rate. The maximum air leakage rate for any dwelling unit
under any compliance path shall not exceed 4.0 air changes per hour. Testing shall be conduct
with a blower door test at a test pressure of 0.2 inches w.g. (50 Pa).
Exception: Additions tested with the existing home having a combined maximum air leakage
of 7 air changes per hour. To qualify for this exception, the date of construction of the existing
dwelling must be prior to the 2009 Washington State Energy Code.
R402.4.1.3.2 Group R-2 multifamily building leakage rate. For Group R-2 multifamily buildin
the maximum leakage rate for any dwelling unit shall not exceed 0.25 cfm per square foot of th
dwelling unit enclosure area. Testing shall be conducted with a blower door at a test pressure o
inches w.g. (50 Pa). Doors and windows of adjacent dwelling units (including top and bottom un
shall be open to the outside during the test. |
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eiling insulation. The thickness of blown-in or sprayed
roof/ceiling insulation (fiberglass or cellulose) shall be written in inches (mm) on markers that are
installed at least one for every 300 square feet (28 m2) throughout the attic space. The markers s
be affixed to the trusses or joists and marked with the minimum initial installed thickness with
numbers a minimum of 1 inch (25 mm) in height.
Each marker shall face the attic access opening. Spray polyurethane foam thickness and installe
value shall be listed on certification provided by the insulation installer.
R303.1.2 Insulation mark installation. Insulating materials shall be installed such that the
manufacturer's R-value mark is readily observable upon inspection. For insulation materials that ar
installed without an observable manufacturer’s R-value mark, such as blown or draped products, a
insulation certificate complying with Section R303.1.1 shall be left immediately after installation by t
installer, in a conspicuous location within the building, to certify the installed R-value of the insulatio
material.
R303.1.3 Fenestration product rating. U-factors of fenestration products (windows, doors and
skylights) shall be determined in accordance with NFRC 100.
Exception: Where required, garage door U-factors shall be determined in accordance with either
NFRC 100 or ANSI/DASMA 105.
U-factors shall be determined by an accredited, independent laboratory, and labeled and certified
the manufacturer. Products |
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different sections of this code specify different
materials, methods of construction or other requirements, the most restrictive shall govern. Where the
a conflict between a general requirement and a specific requirement, the specific requirement shall
govern.
R101.4.1 Mixed residential and commercial buildings. Where a building includes both residentia
building and commercial building portions, each portion shall be separately considered and meet th
applicable provisions of the WSEC - Commercial Provisions or WSEC - Residential Provisions.
R101.5 Compliance. Residential buildings shall meet the provisions of WSEC - Residential Provision
Commercial buildings shall meet the provisions of WSEC - Commercial Provisions.
R101.5.1 Compliance materials. The code official shall be permitted to approve specific computer
software, worksheets, compliance manuals and other similar materials that meet the intent of this c |
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), glazed doors, glazed block and combination
opaque/glazed doors composed of glass or other transparent or translucent glazing materials and
installed at a slope of not less than 60 degrees from horizontal. Opaque areas such as spandrel pa
are not considered vertical fenestration.
SKYLIGHT. Glass or other transparent or translucent glazing material installed at a slope of less than
degrees from horizontal, including unit skylights, tubular daylighting devices and glazing materials i
solariums, sunrooms, roofs and sloped walls.
FENESTRATION AREA. Total area of the fenestration measured using the rough opening, and including t
glazing, sash and frame.
FENESTRATION PRODUCT, FIELD-FABRICATED. A fenestration product whose frame is made at the
construction site of standard dimensional lumber or other materials that were not previously cut, or
otherwise formed with the specific intention of being used to fabricate a fenestration product or exteri
door. Field fabricated does not include site-built fenestration.
FENESTRATION PRODUCT, SITE-BUILT. A fenestration designed to be made up of field-glazed or field-
assembled units using specific factory cut or otherwise factory-formed framing and glazing units.
Examples of site-built fenestration include storefront systems, curtain walls, and atrium roof systems.
F-FACTOR. The perimeter heat loss factor for slab-on-grade floors (Btu/h × ft × °F) [W/(m × K)].
HEATED SLAB-ON-GRADE FLOOR. Slab-on-grade floor construction in which t |
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WATER SYSTEM. A water distribution system where one or more pumps prime t
service hot water piping with heated water upon demand for hot water.
DIMMER. A control device that is capable of continuously varying the light output and energy use of lig
sources.
DUCT. A tube or conduit utilized for conveying air. The air passages of self-contained systems are not
be construed as air ducts.
DUCT SYSTEM. A continuous passageway for the transmission of air that, in addition to ducts, includes
fittings, dampers, plenums, fans and accessory air-handling equipment and appliances. |
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ctors and SHGC are maximums. When insulation is installed in a cavity w
is less than the label or design thickness of the insulation, the compressed R-value of the insulation fro
Appendix A Table A101.4 of chapter 51-11C WAC shall not be less than the R-value specified in the ta
b.
The fenestration U-factor column excludes skylights.
c.
"10/15/21 +5TB" means R-10 continuous insulation on the exterior of the wall, or R-15 continuous insul
on the interior of the wall, or R-21 cavity insulation plus a thermal break between the slab and the base
wall at the interior of the basement wall. "10/15/21 +5TB" shall be permitted to be met with R-13 cavity
insulation on the interior of the basement wall plus R-5 continuous insulation on the interior or exterior o
wall. "5TB" means R-5 thermal break between floor slab and basement wall.
d.
R-10 continuous insulation is required under heated slab on grade floors. See Section R402.2.9.1.
e.
For single rafter- or joist-vaulted ceilings, the insulation may be reduced to R-38 if the full insulation dep
extends over the top plate of the exterior wall.
f.
R-7.5 continuous insulation installed over an existing slab is deemed to be equivalent to the required
perimeter slab insulation when applied to existing slabs complying with Section R503.1.1. If foam plasti
used, it shall meet the requirements for thermal barriers protecting foam plastics.
g.
For log structures developed in compliance with Standard ICC 400, log walls shall meet t |
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2(9) and tested and rated in accorda
with the applicable test procedure.
R403.7.1 Gas fireplace efficiency. All gas fireplace heaters rated to ANSI Z21.88 shall be listed a
labeled with a fireplace efficiency (FE) rating of 50 percent or greater in accordance with CSA P.4.1
Vented gas fireplaces (decorative appliances) certified to ANSI Z21.50 shall be listed and labeled,
including their FE ratings, in accordance with CSA P.4.1.
R403.8 Systems serving multiple dwelling units. Systems serving multiple dwelling units shall com
with Sections C403 and C404 of the WSEC--Commercial Provisions in lieu of Section R403. |
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ement, type or purpose of the original installation.
APPROVED. Acceptable to the code official.
APPROVED AGENCY. An established and recognized agency that is regularly engaged in conducting tes
furnishing inspection services, or furnishing product certification, where such agency has been appro
by the code official.
AUTOMATIC. Self-acting, operating by its own mechanism when actuated by some impersonal influenc
as, for example, a change in current strength, pressure, temperature or mechanical configuration (se
"Manual").
BASEMENT WALL. See above-grade wall and below-grade wall. |
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tio
R402.2.10.
Shafts, penetrations
Duct and flue shafts to exterior or
unconditioned space shall be air sealed.
Utility penetrations of the air barrier shall
be caulked, gasketed or otherwise sealed
and shall allow for expansion and
contraction of materials and mechanical
vibration.
Insulation shall be fitted tightly aro
utilities passing through shafts and
penetrations in the building therma
envelope to maintain required R-
value.
Narrow cavities
Narrow cavities, of 1 inch or less, not able
to be insulated, shall be air sealed.
Batts in narrow cavities shall be cu
fit and installed to the correct dens
without any voids or gaps or
compression, or narrow cavities s
be filled by insulation that on
installation readily conforms to the
available cavity space.
Garage separation
Air sealing shall be provided between the
garage and conditioned spaces.
Insulated portions of the garage
separation assembly shall be insta
in accordance with Sections R303
and R402.2.8.
Recessed lighting
Recessed light fixtures installed in the
building thermal envelope shall be air
sealed in accordance with Section
R402.4.3.
Recessed light fixtures installed in
building thermal envelope shall be
tight and IC rated and shall be buri
or surrounded with insulation. |
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ormance with the code edition under which installed. The owner or the owner’s authorized agent
be responsible for the maintenance of buildings and structures. The requirements of this chapter shall
provide the basis for removal or abrogation of energy conservation, fire protection and safety systems
and devices in existing structures.
R501.4 Compliance. Alterations, repairs, additions and changes of occupancy to, or relocation of,
existing buildings and structures shall comply with the provisions for alterations, repairs, additions an
changes of occupancy or relocation, respectively, in this code and the International Residential Code,
International Building Code, International Existing Building Code, International Fire Code, Internation
Fuel Gas Code, International Mechanical Code, Uniform Plumbing Code, International Property
Maintenance Code, and NFPA 70.
R501.5 New and replacement materials. Except as otherwise required or permitted by this code,
materials permitted by the applicable code for new construction shall be used. Like materials shall be
permitted for repairs, provided hazards to life, health or property are not created. Hazardous material
shall not be used where the code for new construction would not permit their use in buildings of simila
occupancy, purpose and location.
R501.6 Historic buildings. The code official may modify the specific requirements of this code for
historic buildings and require alternative provisions which will result in a rea |
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sonable degree of energy
efficiency. This modification may be allowed for those buildings or structures that are listed in the stat
national register of historic places; designated as a historic property under local or state designation l
or survey; certified as a contributing resource with a national register listed or locally designated histo
district; or with an opinion or certification that the property is eligible to be listed on the national or stat
registers of historic places either individually or as a contributing building to a historic district by the st
historic preservation officer or the keeper of the national register of historic places. |
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he requiremen
climate zone 5 of ICC 400.
h.
Int. (intermediate framing) denotes framing and insulation as described in Section A103.2.2 including
standard framing 16 inches on center, 78 percent of the wall cavity insulated and headers insulated with
minimum of R-10 insulation.
i.
The first value is cavity insulation, the second value is continuous insulation. Therefore, as an example,
“R13+10” means R-13 cavity insulation plus R-10 continuous insulation.
j.
A maximum U-factor of 0.32 shall apply to vertical fenestration products installed in buildings located ab |
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he heating elements, hydro
tubing, or hot air distribution system is in contact with, or placed within or under, the slab.
HIGH-EFFICACY LIGHT SOURCES. Compact fluorescent lamps, light-emitting diode (LED) lamps, T-8 or s
diameter linear fluorescent lamps, or other lamps with an efficacy of not less than 65 lumens per watt,
luminaires with an efficacy of not less than 45 lumens per watt.
HISTORIC BUILDINGS. Buildings that are listed in or eligible for listing in the National Register of Historic
Places, or designated as historic under an appropriate state or local law.
INFILTRATION. The uncontrolled inward air leakage into a building caused by the pressure effects of wi
or the effect of differences in the indoor and outdoor air density or both.
INSULATING SHEATHING. An insulating board with a core material having a minimum R-value of R-2.
INSULATING SIDING. A type of continuous insulation with manufacturer-installed insulating material as a
integral part of the cladding product having a minimum R-value of R-2. |
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and specifications.
R105.2.2.1 Wall insulation inspection. The code official, upon notification, shall make a wall
insulation inspection in addition to those inspections required in Section R109 of the International
Residential Code. This inspection shall be made after all wall and cavity insulation is in place and
prior to cover.
R105.2.3 Plumbing rough-in inspection. Inspections at plumbing rough-in shall verify compliance
required by the code and approved plans and specifications as to types of insulation and correspon
R-values and protection, and required controls.
R105.2.4 Mechanical rough-in inspection. Inspections at mechanical rough-in shall verity compli
as required by the code and approved plans and specifications as to installed HVAC equipment typ
and size, required controls, system insulation and corresponding R-value, system air leakage contr
programmable thermostats, dampers, whole-house ventilation and minimum fan efficiency. |
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SECTION R102
ALTERNATIVE MATERIALS, DESIGN AND METHODS
OF CONSTRUCTION AND EQUIPMENT
R102.1 General. The provisions of this code are not intended to prevent the installation of any materi
to prohibit any design or method of construction not specifically prescribed by this code, provided that
such alternative has been approved. The code official shall have the authority to approve an alternate
material, design or method of construction upon the written application of the owner or the owner’s
authorized agent. The code official shall first find that the proposed design is satisfactory and complie
with the intent of the provisions of this code, and that the material, method or work offered is, for the
purpose intended, not less than the equivalent of that prescribed in this code for strength, effectivene
fire resistance, durability, energy efficiency and safety. The code official shall respond in writing, stati
the reasons why the alternative was approved or was not approved. |
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lacking such a labeled U-factor shall be assigned a default U-factor fro
Table R303.1.3(1), R303.1.3(2) or R303.1.3(4). The solar heat gain coefficient (SHGC) and visible
transmittance (VT) of glazed fenestration products (windows, glazed doors and skylights) shall be
determined in accordance with NFRC 200 by an accredited, independent laboratory, and labeled a |
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| 2111 |
2111 Eisenhower Avenue
Alexandria, VA 22314
Standard
R
reference
number
Title
sectio
APSP 14-2019
American National Standard for Portable Electric Spa Energy Efficiency ............. R
APSP 15a-2013
American National Standard for Residential Swimming Pool
and Spa energy efficiency ................................................................................. R |
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24 School Street, 2nd Floor
Boston, MA 02108-4314
Standard
R
reference
number
Title
sectio
cc ASHP Version 3.1
Cold Climate Air Source Heat Pump (ccASHP)
Product List and Specifications: ...........................................................Table C40
https://neep.org/heating-electrification/ccashp-specification-product-list
NEMA
National Electrical Manufacturers Association |
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| 25 |
25% glazed fenestration (22 in.x36 in. lite)
– |
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| 25 |
25 West 43rd Street, 4th Floor
New York, NY 10036
Standard
R
reference
number
Title
sectio
Z21-50-2016/CSA 2.22- |
62 |
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| 25.5 |
25.5 + (8.5 x Nbr) x
(1-HWDS)
Where:
Nbr = number of bedro
HWDS = factor for the
compactness of the ho
water distribution syste
Compactness
Ratioi Factor
H |
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| 2800 |
2800 Shirlington Road, Suite 300
Arlington, VA 22206
Standard
R
reference
number
Title
sectio
Manual J—16
Residential Load Calculation Eighth Edition ...........................................................
Manual S—14
Residential Equipment ............................................................................................
ANSI
America National Standards Institute |
62 |
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| 3 |
3. Large Dwelling Unit: .......................................................................................... 9.0 credits
Dwelling units exceeding 5000 square feet of conditioned floor area. |
47 |
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| 3 |
3)
All metal framing members of the products exposed to interior and exterior air shall incorporate a therm
break meeting the criteria in 1) and 2) above.
R303.1.4 Insulation product rating. The thermal resistance (R-value) of insulation shall be determ
in accordance with the U.S. Federal Trade Commission R-value rule (C.F.R. Title 16, Part 460) in u
of h × ft2 × °F/Btu at a mean temperature of 75°F (24°C).
R303.1.4.1 Insulated siding. The thermal resistance (R-value) of insulated siding shall be
determined in accordance with ASTM C1363. Installation for testing shall be in accordance with t
manufacturer’s installation instructions.
R303.1.5 Air-impermeable insulation. Insulation having an air permeability not greater than 0.004
cubic feet per minute per square foot [0.002 L/(s x m2)] under pressure differential of 0.3 inch water
gauge (75 Pa) when tested in accordance with ASTM E2178 shall be determined air-impermeable
insulation.
R303.2 Installation. All materials, systems and equipment shall be installed in accordance with the
manufacturer's installation instructions and the International Building Code or International Residentia
Code, as applicable.
R303.2.1 Protection of exposed foundation insulation. Insulation applied to the exterior of basem
walls, crawlspace walls and the perimeter of slab-on-grade floors shall have a rigid, opaque and weat
resistant protective covering to prevent the degradation of the insulation's thermal performance. The
protective cover |
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| 3 |
3. For forced air ducts, a maximum of 10 linear feet of return ducts and 5 linear feet of supply du
is permitted to be located outside the conditioned space, provided they are insulated to a
minimum of R-8. |
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| 3 |
3. Ductless mini-split heat pump systems that have an integral proprietary thermostat. |
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| 3 |
3. Section R407.
R401.3 Certificate. A permanent certificate shall be completed by the builder or other approved party
posted on a wall in the space where the furnace is located, a utility room, or an approved location insi
the building. When located on an electrical panel, the certificate shall not cover or obstruct the visibilit
the circuit directory label, service disconnect label, or other required labels. The certificate shall indica
the following: |
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| 3 |
3. The results from any required duct system and building envelope air leakage testing done on th
building. |
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| 3 |
3. Existing duct systems constructed, insulated or sealed with asbestos.
R502.3.3 Service hot water systems. New service hot water systems that are part of the addition
comply with Section R403.5.
R502.3.4 Lighting. New lighting systems that are part of the addition shall comply with Section R4
R502.4 Existing plus addition compliance (Total Building Performance). Where nonconditioned
space is changed to conditioned space the addition shall comply where the annual energy use of the
addition and the existing building, and any alterations that are part of the project, is less than or equal
the annual energy use of the existing building when modeled in accordance with Section R405. The
addition and any alterations that are part of the project shall comply with Section R405 in its entirety. |
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| 3 |
3. For structures 1,500 to 5,000 square feet of conditioned floor area, the annual site energy
consumption shall be no more than 47 percent of the standard reference design. |
38 |
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| 3 |
3. A statement, bearing the name of the individual performing the analysis and generating the
report, along with their organization and contact information, indicating that the as-built buil
complies with Section R405.2. |
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| 3 |
3. Fenestration U-factors and SHGCs. |
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| 3 |
3. Controls that override automatic shut-off actions shall not be allowed unless the override
automatically returns automatic control to its normal operation within 24 hours. |
37 |
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| 3 |
3. HIGH EFFICIENCY HVAC EQUIPMENT OPTIONS
Only one option from Items 3.1 through 3.10 may be selected in this category. Item 3.11 may be taken wit
Items 3.1 or 3.33.2c only. |
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| 3 |
3. The hot water rectangle shall be shown on the floor plans and the area shall be computed to the near
square foot. |
44 |
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| 3 |
3)
All metal framing members of the products exposed to interior and exterior air shall incorpor
thermal break meeting the criteria in 1) and 2) above.
c.
A minimum air space of 0.375 inches between panes of glass is required for double glazing.
d.
A minimum air space of 0.25 inches between panes of glass is required for triple glazing.
e.
Deemed to comply glazing shall not be used for performance compliance. |
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| 3 |
3. Greenhouses isolated from any conditioned space and not intended for occupancy.
R402.1.1 Vapor retarder. Wall assemblies in the building thermal envelope shall comply with the v
retarder requirements of Section R702.7 of the International Residential Code or Section 1404.3 of
International Building Code, as applicable.
R402.1.2 Insulation and fenestration criteria. The building thermal envelope shall meet the
requirements of Table R402.1.2 based on the climate zone specified in Chapter 3. Assemblies shal
have a U-factor equal to or less than that specified in Table R402.1.2. Fenestration shall have a
U-factor equal to or less than specified in Table R402.1.2.
TABLE R402.1.2
INSULATION AND FENESTRATION REQUIREMENTS BY COMPONENTa
For SI: 1 foot = 304.8 mm, ci = continuous insulation, int = intermediate framing.
a.
U-factors or F-factors shall be obtained from measurement, calculation or an approved source,
or as specified in Section R402.1.5.
b.
A maximum U-factor of 0.32 shall apply to vertical fenestration products installed in buildings located
above 4000 feet in elevation above sea level, or in windborne debris regions where protection of
openings is required under Section R301.2.1.2 of the International Residential Code. |
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| 3 |
3. Group R-3 occupancy areas in buildings three stories or less in height above grade plane whos
dwelling units are accessed directly from the exterior. |
11 |
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| 3 |
3.
Gap fill shall be assumed to be air unless there is a minimum of 90% argon or krypton. |
17 |
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| 3 |
3. The name and version of the compliance software tool. |
38 |
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| 3 |
3. A combination of cavity and continuous insulation shall be installed so that the cavity insulatio
in contact with the top side of the continuous insulation that is installed on the underside of th
floor framing separating the cavity and the unconditioned space below. The combined R-valu
the cavity and continuous insulation shall equal the required R-value for floors. Insulation sha
extend from the bottom to the top of all perimeter floor framing members and the framing
members shall be air sealed.
Exceptions: |
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| 3 |
3. Repairs where only the bulb and/or ballast within the existing luminaires in a space are replace
provided that the replacement does not increase the installed interior lighting power.
SECTION R505
CHANGE OF OCCUPANCY OR USE
R505.1 General. Any space not within the scope of Section R101.2 which is converted to space that i
within the scope of Section R101.2 shall be brought into full compliance with this code.
Spaces undergoing a change in occupancy that would result in an increase in demand for either fos
fuel or electrical energy shall comply with this code.
Any space that is converted to a dwelling unit or portion thereof from another use or occupancy shall
comply with this code.
Exception: Where the simulated performance option in Section R405 is used to comply with this
section, the annual energy use of the proposed design is permitted to be 110 percent of the annual
energy use otherwise allowed by Section R405.3.
R505.1.1 Unconditioned space. Any unconditioned or low-energy space that is altered to become
conditioned space shall comply with Section R502. |
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| 3 |
3. Construction where the existing roof, wall or floor cavity is not exposed. |
60 |
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| 3 |
3. Gas heat pump water heaters intended for exterior installation. |
34 |
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| 3 |
3. A list of compliance features. |
56 |
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| 3 |
3 Park Avenue
New York, NY 10016-5997
Standard
R
reference
number
Title
sectio |
64 |
pdf_text |
| 3 |
3. Pool heaters. |
31 |
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| 3 |
3. Interior doors, if installed at the time of the test, shall be open, access hatches to condition
crawl spaces and conditioned attics shall be open. |
26 |
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| 3 |
3. Lighting designed for safety or security.
R404.3 Exterior lighting controls. Where the total permanently installed exterior lighting power is
greater than 30 watts, the permanently installed exterior lighting shall comply with the following: |
37 |
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| 3 |
3. The heat pump is operating in defrost mode. |
34 |
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| 3 |
3.
Washing machine (Residential) – Energy Star rated (Version |
54 |
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| 3 |
3. Printed code official inspection checklist listing each of the proposed design component
characteristics from Table R405.4.2(1) determined by the analysis to provide compliance, alo
with their respective performance ratings (e.g., R-value, U-factor, SHGC, HSPF, AFUE, SEE
EF, etc.).
R405.5.2 Specific approval. Performance analysis tools meeting the applicable sections of Sectio
R405 shall be permitted to be approved. Tools are permitted to be approved based on meeting a
specified threshold for a jurisdiction. The code official shall be permitted to approve tools for a speci
application or limited scope.
R405.5.3 Input values. When calculations require input values not specified by Sections R402, R4
R404 and R405, those input values shall be taken from an approved source. |
45 |
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| 3 |
3. Test for ducts within thermal envelope: Where all ducts and air handlers are located entirely
within the building thermal envelope, total leakage shall be less than or equal to 8.0 cubic fee
minute (226.6 L/min) per 100 square feet (9.29 m2) of conditioned floor area. For forced air d
a maximum of 10 linear feet of return ducts and 5 linear feet of supply ducts may be located
outside the conditioned space. All metallic ducts located outside the conditioned space must
both transverse and longitudinal joints sealed with mastic. If flex ducts are used, they cannot
contain splices. Flex duct connections must be made with nylon straps and installed using a
plastic strapping tensioning tool. Ducts located in crawl spaces do not qualify for this exceptio
R403.3.7 Building cavities. Building framing cavities shall not be used as ducts or plenums.
Installation of ducts in exterior walls, floors or ceilings shall not displace required envelope insulatio
R403.4 Mechanical system piping insulation. Mechanical system piping capable of carrying fluids
above 105°F (41°C) or below 55°F (13°C) shall be insulated to a minimum of R-6.
Exception: Up to 200 feet of hydronic system piping installed within the conditioned space may be
insulated with a minimum of ½-inch insulation with a k value of 0.28.
R403.4.1 Protection of piping insulation. Piping insulation, including termination ends, exposed t
weather shall be protected from damage, including that caused by sunlight, moisture, ph |
33 |
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| 3 (cont. 2) |
ysical dam
and wind, and shall provide shielding from solar radiation that can cause degradation of the materia
Protection shall be removable for the exposed length or no less than six inches from the equipment
maintenance. Adhesive tape shall not be permitted.
R403.5 Service hot water systems. Energy conservation measures for service hot water systems s
be in accordance with this section. Service water-heating equipment shall meet the requirements of D |
33 |
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| 3 (cont. 2) |
ing shall cover the exposed exterior insulation and extend a minimum of 6 inches (15
mm) below grade.
R303.3 Maintenance information. Maintenance instructions shall be furnished for equipment and
systems that require preventive maintenance. Required regular maintenance actions shall be clearly
stated and incorporated on a readily visible label. The label shall include the title or publication numb
for the operation and maintenance manual for that particular model and type of product. |
15 |
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| 3.1 |
3.1. Metallic ducts located outside the conditioned space must have both transverse and
longitudinal joints sealed with mastic. |
31 |
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| 3.1 |
3.1a
For a System Type 1 in Table R406.2:
Energy Star rated (U.S. North) Gas or propane furnace with minimum
AFUE of 95%
or
Energy Star rated (U.S. North) Gas or propane boiler with minimum
AFUE of 90%.
To qualify to claim this credit, the building permit drawings shall specify
the option being selected and shall specify the heating equipment type
and the minimum equipment efficiency. |
49 |
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| 3.10 |
3.10f
Combination water heating and space heating system shall include one
of the following:
Gas-fired heat pump water heater(s) meeting Tier 2 of the NEEA
Advanced Water Heating Specification for Gas-Fueled Residential
Storage Water Heaters Version 1.0.
or
For R-2 Occupancy, gas-fired heat pump water heater(s) meeting Tier 2
of the NEEA Advanced Water Heating Specification for Gas-Fueled
Residential Storage Water Heaters Version 1.0., shall serve all units.
or
For R-2 Occupancy, gas-fired heat pump(s) meeting ANSI Z21.40.2 and
Z21.40.4 or CSA, with a minimum UEF of 1.15, shall serve all units.
To qualify to claim this credit, the building permit drawings shall specify
the option being selected and shall specify the water heater equipment
type and the minimum equipment efficiency and, for solar water heating
systems, the calculation of the minimum energy savings. |
51 |
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| 3.11 |
3.11c
Connected thermostat meeting ENERGY STAR Certified Smart
Thermostats/EPA ENERGY STAR specifications.
To qualify to claim this credit, the building permit drawings shall specify
the option being selected and shall specify the thermostat model. |
51 |
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| 3.2 |
3.2. If flex ducts are used, they cannot contain splices. Flex duct connections must be made
nylon straps and installed using a plastic strapping tensioning tool. |
31 |
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| 3.2 |
3.2a
For secondary heating system serving System Type 2 in Table R406.2:
Air-source centrally ducted heat pump with minimum HSPF of 9.5
Energy Star rated (U.S. North) Gas or propane furnace with minimum
AFUE of 95%
or
Energy Star rated (U.S. North) Gas or propane boiler with minimum
AFUE of 90%.
To qualify to claim this credit, the building permit drawings shall specify
the option being selected and shall specify the heating equipment type
and the minimum equipment efficiency. |
49 |
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| 3.3 |
3.3a,c,d
Air-source, centrally ducted heat pump with minimum HSPF2 of 8.1
(HSPF of 9.5).
In areas where the winter design temperature as specified in Appendix
RC is 23°F or below, a cold climate heat pump found on the NEEP cc
ASHP qualified product list shall be used.
To qualify to claim this credit, the building permit drawings shall specify
the option being selected and shall specify the heating equipment type
and the minimum equipment efficiency. |
49 |
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| 3.4 |
3.4a,d
Closed-loop ground source heat pump; with a minimum COP of 3.3
or
Open loop water source heat pump with a maximum pumping hydraulic
head of 150 feet and minimum COP of 3.6.
To qualify to claim this credit, the building permit drawings shall specify
the option being selected and shall specify the heating equipment type
and the minimum equipment efficiency. |
50 |
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| 3.5 |
3.5d
Ductless mini-split heat pump system, zonal control: In homes where
the primary space heating system is zonal electric heating, a ductless
mini-split heat pump system with a minimum HSPF2 of 9 (HSPF of |
50 |
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| 3.6 |
3.6a
Air-source, centrally ducted heat pump with minimum HSPF2 of 9.4
(HSPF of 11.0).
A centrally ducted air source cold climate variable capacity heat pump
(cc VCHP) found on the NEEP cc VCHP qualified product list with a
minimum of 9 8.5 HSPF2 (10 HSPF) may be used to satisfy this
requirement.
In areas where the winter design temperature as specified in Appendix
RC is 23°F or below, an air source centrally ducted heat pump shall be
a cold climate variable capacity heat pump as listed on the NEEP
qualified product list.
To qualify to claim this credit, the building permit drawings shall specify
the option being selected and shall specify the heating equipment type
and the minimum equipment efficiency. |
50 |
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| 3.7 |
3.7a,d,e
Ductless split system heat pumps with no electric resistance heating in
the primary living areas. A ductless heat pump system with a minimum
HSPF2 of 9 (HSPF of 10) shall be sized and installed to provide heat to
entire dwelling unit at the design outdoor air temperature.
Exception: In homes with total heating loads of 24,000 or less
using multi-zone mini-split systems with nominal ratings of 24,000
or less, the minimum HSPF s to claim this credit shall be 8.19
HSPF2 (or 9 HSPF).
To qualify to claim this credit, the building permit drawings shall specify
the option being selected, the heated floor area calculation, the heating
equipment type(s), the minimum equipment efficiency, and total
installed heat capacity (by equipment type). |
50 |
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| 3.8 |
3.8a,d
Air-to-water heat pump with minimum COP of 3.2 at 47°F, rated in
accordance with AHRI 550/590 by an accredited or certified testing lab.
To qualify to claim this credit, the building permit drawings shall specify
the option being selected, the heated floor area calculation, the heating
equipment type(s), the minimum equipment efficiency, and total
installed heat capacity (by equipment type). |
50 |
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| 3.9 |
3.9
Gas-fired heat pump(s) meeting ANSI Z21.40.2 and Z21.40.4 or CSA,
with a minimum UEF of 1.15.
For R-2 Occupancy, gas-fired heat pump(s) meeting ANSI Z21.40.2 and
Z21.40.4 or CSA, with a minimum UEF of 1.15, shall serve all units.
To qualify to claim this credit, the building permit drawings shall specify
the option being selected and shall specify the heating equipment type
and the minimum equipment efficiency. |
51 |
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| 30 |
30 inches of clear distance from the top of the bottom chord of the truss or ceiling joist to the
underside of the sheathing at the roof ridge.
R402.2.2 Reserved.
R402.2.3 Eave baffle. For air-permeable insulation in vented attics, a baffle shall be installed adjac
to soffit and eave vents. Baffles shall maintain a net free area opening equal to or greater than the
of the vent. The baffle shall extend over the top of the attic insulation. The baffle shall be permitted
be any solid material. The baffle shall be installed to the outer edge of the exterior wall top plate so
to provide maximum space for attic insulation coverage over the top plate. Where soffit venting is n
continuous, baffles shall be installed continuously to prevent ventilation air in the eave soffit from
bypassing the baffle.
R402.2.4 Access hatches and doors. Access hatches and doors from conditioned spaces to
unconditioned spaces such as attics and crawl spaces shall be insulated to the same R-value requi
by table R402.1.3 for the wall or ceiling in which they are installed.
Exception: Vertical doors providing access from conditioned spaces to unconditioned spaces tha
comply with the fenestration requirements of Table R402.1.3.
R402.2.4.1 Access hatches and door insulation installation and retention. Vertical or horizon
access hatches and doors from conditioned spaces to unconditioned spaces such as attics and c
spaces shall be weatherstripped. Access that prevents damaging or compressing the in |
24 |
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| 30 (cont. 2) |
sulation s
be provided to all equipment. Where loose fill insulation is installed, a wood framed or equivalent
baffle or retainer, or dam shall be installed to prevent the loose-fill insulation from spilling into the
living spaces, from higher to lower sections of the attic and from attics covering conditioned spac
unconditioned spaces. The baffle or retainer shall provide a permanent means of maintaining the
installed R-value of the loose fill insulation.
R402.2.5 Mass walls. Mass walls, where used as a component of the building thermal envelope sh
be one of the following: |
24 |
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| 333 |
333 Pfingsten Road
Northbrook, IL 60062
Standard
R
reference
number
Title
sectio
UL 127—2011
Factory Built Fireplace ..........................................................................................
UL 515—2015
Standard for Electrical Resistance Trace Heating for
Commercial Applications ................................................................................... R
UL 907—1994
Fireplace Accessories (with revisions through April 2010) ...................................
US-FTC
United States-Federal Trade Commission |
65 |
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| 346-2017 |
346-2017 and be so labeled.
To qualify to claim this credit, the building permit drawings shall include
a plumbing diagram that specifies the drain water heat recovery units
and the plumbing layout needed to install it. Labels or other
documentation shall be provided that demonstrates that the unit
complies with the standard. |
52 |
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| 4 |
4. The vapor compression cycle malfunctions or loses power.
Exception: Heat trace temperature maintenance systems, provided the system capacity does
exceed the capacity of the heat pump water heating system. |
34 |
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| 4 |
4 cfm (113.3 L/min) per 100 square feet (9.29 m2) of conditioned floor area when tested at a
pressure differential of 0.1 inches w.g. (25 Pa) across the entire system, including the
manufacturer's air handler enclosure. All register boots shall be taped or otherwise sealed du
the test. |
33 |
pdf_text |
| 4 |
4. Documentation of all inputs entered into the software used to produce the results for the
reference design and/or the rated home. |
38 |
pdf_text |
| 4 |
4. Group R-2 occupancy areas in buildings three stories or less in height above grade plane whos
dwelling units are accessed directly from the exterior. |
11 |
pdf_text |
| 4 |
4. Spa heaters. |
31 |
pdf_text |
| 4 |
4. Exterior or interior terminations for continuous ventilation systems and heat recovery ventil
shall be sealed. |
26 |
pdf_text |
| 4 |
4.
Aluminum frame with thermal break is as defined in footnote 1 to Table R303.1.3(1). |
17 |
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| 4 |
4. Roof recover. |
60 |
pdf_text |
| 4 |
4. Area-weighted U-factor and SHGC calculations. |
2 |
pdf_text |
| 4 |
4.
Dryer – Energy Star rated, Most Efficient 2022
To qualify to claim this credit, the building permit drawings shall specify
the option being selected and shall show the appliance type and provide
documentation of Energy Star compliance. At the time of inspection, all
appliances shall be installed and connected to utilities. Dryer ducts and
exterior dryer vent caps are not permitted to be installed in the dwelling
unit. |
54 |
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| 4 |
4. Ductwork in floor cavities located over unconditioned space shall comply with all of the followi |
31 |
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| 4 |
4. Dwelling units serving Group R-2 occupancies: ................................................ 6.5 credits
See Section R401.1 and residential building
in Section R202 for Group R-2 scope. |
47 |
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| 4 |
4. A PHIUS precertification letter.
Prior to the issuance of a certificate of occupancy, the following item must be provided to the cod
official: |
56 |
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| 4 |
4. Atmospheric vented gas water heaters.
R403.5.6 Water heater insulation. All tank-type water heaters in unconditioned spaces, or on con
floors in conditioned spaces, shall be placed on an insulated surface with a minimum thermal resist
of R-10, and a minimum compressive strength of 40 psi or engineered to support the appliance.
R403.5.7 Supplementary heat for heat pump water heating systems. Heat pumps used for wat
heating and having supplementary water heating equipment shall have controls that limit
supplementary water heating equipment operation to only those times when one of the following
applies: |
34 |
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| 4 |
4. Where there is more than one water heater and each water heater serves different plumbing fixtures
appliances, it is permissible to establish a separate hot water rectangle for each hot water distributi
system and add the area of these rectangles together to determine the compactness ratio. |
44 |
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| 4 |
4. The results from the whole-house mechanical ventilation system flow rate test. |
19 |
pdf_text |
| 4 |
4. The name and version of the compliance software tool. |
40 |
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| 4 |
4. For structures over 5,000 square feet of conditioned floor area, the annual site energy consum
shall be no more than 41 percent of the standard reference design. |
38 |
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| 4 |
4. HIGH EFFICIENCY HVAC DISTRIBUTION SYSTEM OPTIONS |
51 |
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| 4.1 |
4.1. A continuous air barrier installed between unconditioned space and the duct. |
31 |
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| 4.1 |
4.1
HVAC equipment and associated duct system(s) installation shall
comply with the requirements of Section R403.3.2.
Electric resistance heat, hydronic heating and ductless heat pumps are
not permitted under this option.
Direct combustion heating equipment with AFUE less than 80% is not
permitted under this option.
To qualify to claim this credit, the building permit drawings shall specify
the option being selected and shall specify the heating equipment type
and shall show the location of the heating and cooling equipment and all
the ductwork. |
51 |
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| 4.2 |
4.2. Insulation installed in accordance with Section R402.2.7. |
32 |
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| 4.3 |
4.3. A minimum R-19 insulation installed in the cavity width separating the duct from
unconditioned space. |
32 |
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| 400 |
400—2020
Procedure for Determining Fenestration Product Air Leakage—Second Edition
UL
Underwriters Laboratories LLC |
65 |
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| 4000 |
4000 feet in elevation above sea level, or in windborne debris regions where protection of openings is
required under Section R301.2.1.2 of the International Residential Code. |
21 |
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| 421 |
421 SW 6th Ave, Suite 600
Portland, OR 97204
Standard
R
reference
number
Title
sectio
NEEA-2011
Northern Climate Specification for Heat Pump Water Heaters, Vers. 4.0 ..... Tabl
NEEA-2019
Advanced Water Heating Specifications for Gas-Fueled
Residential Storage Water Heaters, Version 1.0 .............................................. R |
64 |
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| 45 |
45% glazed fenestration (22 in.x64 in. lite)
– |
16 |
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| 4C |
4C Grays Harbor |
13 |
pdf_text |
| 4C |
4C San Juan |
13 |
pdf_text |
| 5 |
5. Additions 150 square feet to 500 square feet: ................................................... 2.0 credits
The drawings included with the building permit application shall identify which options have been
selected and the point value of each option, regardless of whether separate mechanical, plumbing,
electrical, or other permits are utilized for the project.
TABLE R406.3
ENERGY CREDITS
OPTION
DESCRIPTION
CREDIT(S)
All Other
Group R |
47 |
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| 5 |
5. Accessory structures to residential buildings.
Group R-2 buildings with dwelling units accessed from interior corridors or other interior spaces are
residential buildings.
ROOF ASSEMBLY. A system designed to provide weather protection and resistance to design loads. Th
system consists of a roof covering and roof deck or a single component serving as both the roof cove
and the roof deck. A roof assembly includes the roof covering, underlayment and roof deck, and can
include a thermal barrier, an ignition barrier, insulation or a vapor retarder.
ROOF RECOVER. The process of installing an additional roof covering over a prepared existing roof
covering without removing the existing roof covering.
ROOF REPAIR. Reconstruction or renewal of any part of an existing roof for the purposes of its
maintenance.
ROOF REPLACEMENT. The process of removing the existing roof covering, repairing any damaged subs
and installing a new roof covering.
R-VALUE (THERMAL RESISTANCE). The inverse of the time rate of heat flow through a body from one of i
bounding surfaces to the other surface for a unit temperature difference between the two surfaces, un
steady state conditions, per unit area (h • ft2 • °F/Btu) [(m2 • K)/W].
SERVICE WATER HEATING. Supply of hot water for purposes other than comfort heating.
SLAB-ON-GRADE FLOOR. That portion of a slab floor of the building envelope that is in contact with the
ground and that is either above grade or is less than or equal to 24 inches below |
11 |
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| 5 |
5. For structures serving Group R-2 occupancies, the annual site energy consumption shall be les
than or equal to 61 percent of the annual site energy consumption of the standard reference de
See Section R401.1 and residential building in Section R202 for Group R-2 scope.
Energy use derived from simulation analysis shall be expressed in Btu per square foot of conditione
floor area per year.
R405.3 Documentation. Documentation of the software used for the performance design and the
parameters for the building shall be in accordance with Sections R405.3.1 through R405.3.2.2.
R405.3.1 Compliance software tools. Documentation verifying that the methods and accuracy of
compliance software tools conform to the provisions of this section shall be provided to the code off
R405.3.2 Compliance report. Compliance software tools shall generate a report that documents th
the proposed design complies with Section R405.2. A compliance report on the proposed design sh
be submitted with the application for the building permit. Upon completion of the building, a confirm
compliance report based on the confirmed condition of the building shall be submitted to the code
official before a certificate of occupancy is issued.
Compliance reports shall include information in accordance with Sections R405.3.2.1 and R405.3
R405.3.2.1 Compliance report for permit application. A compliance report submitted with the
application for building permit shall include all of the following: |
38 |
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| 5 |
5. EFFICIENT WATER HEATING OPTIONS
Only one option from Items 5.3 through 5.8 may be selected in this category. Items 5.1 and 5.2 may be
combined with any option. |
52 |
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| 5 |
5. The basement or attic shall be counted as a story when it contains the water heater. |
44 |
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| 5 |
5. A certificate indicating that the proposed design complied with Section R405.2. The certific
shall document the building components’ energy specifications that are included in the
calculation including: component-level insulation R-values or U-factors; duct system and
building envelope air leakage testing assumptions; and the type and rated efficiencies of
proposed heating, cooling, mechanical ventilation and service water-heating equipment to
installed. If on-site renewable energy systems will be installed, the certificate shall report th
type and production size of the proposed system. Additional documentation reporting estim
annual energy production shall be provided. |
38 |
pdf_text |
| 5 |
5. Ductwork located within exterior walls of the building thermal envelope shall comply with the
following: |
32 |
pdf_text |
| 5 |
5. Roofs without insulation in the cavity and where the sheathing or insulation is exposed du
reroofing shall be insulated either above or below the sheathing. |
60 |
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| 5 |
5. Fireplaces
Exception: Any fireplace with on-demand, intermittent or interrupted ignition (as define
ANSI Z21.20) is not considered continuous.
R403.2 Hot water boiler temperature reset. The manufacturer shall configure each gas, oil and ele
boiler (other than a boiler equipped with a tankless domestic water heating coil) with an automatic me
of adjusting the water temperature supplied by the boiler to ensure incremental change of the inferred
heat load will cause an incremental change in the temperature of the water supplied by the boiler. Thi
can be accomplished with outdoor reset, indoor reset or water temperature sensing.
R403.3 Ducts. Ducts and air handlers shall be installed in accordance with Sections R403.3.1 throug
R403.3.7.
R403.3.1 Ducts located outside conditioned space Supply and return ducts located outside
conditioned space shall be insulated to an R-value of not less than R-8 for ducts 3 inches (76 mm) i
diameter and larger and not less than R-6 for ducts smaller than 3 inches (76 mm) in diameter. Duc
buried beneath a building shall be insulated as required per this section or have an equivalent ther
distribution efficiency. Ducts within a concrete slab or in the ground shall be insulated to R-10 with
insulation designed to be used below grade. Underground ducts utilizing the thermal distribution
efficiency method shall be listed and labeled to indicate the R-value equivalency.
R403.3.2 Ducts located in conditioned space. For ducts to be considered a |
31 |
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| 5 |
5. A site-specific energy analysis report that is in compliance with Section R405.2. |
40 |
pdf_text |
| 5 |
5. Heating and cooling systems, if installed at the time of the test, shall be turned off. |
27 |
pdf_text |
| 5 |
5. Mechanical system design criteria. |
2 |
pdf_text |
| 5 |
5. The types, sizes and efficiencies of heating, cooling, whole-house mechanical ventilation, and
service water heating appliances. Where a gas-fired unvented room heater, electric furnace, or
baseboard electric heater is installed in the residence, the certificate shall list "gas-fired unvent
room heater," "electric furnace" or "baseboard electric heater," as appropriate. An efficiency sh
not be listed for gas-fired unvented room heaters, electric furnaces or electric baseboard heater |
19 |
pdf_text |
| 5 (cont. 2) |
the final elevation of
nearest exterior grade.
SMALL BUSINESS. Any business entity (including a sole proprietorship, corporation, partnership or othe
legal entity) which is owned and operated independently from all other businesses, which has the
purpose of making a profit, and which has fifty or fewer employees.
SOLAR HEAT GAIN COEFFICIENT (SHGC). The ratio of the solar heat gain entering the space through the
fenestration assembly to the incident solar radiation. Solar heat gain includes directly transmitted sola
heat and absorbed solar radiation which is then reradiated, conducted or convected into the space.
STANDARD FRAMING. All framing practices not defined as "intermediate" or "advanced" shall be consid
standard. (See Advanced Framed Wall, Intermediate Framed Wall).
STANDARD REFERENCE DESIGN. A version of the proposed design that meets the minimum requirement
this code and is used to determine the maximum annual energy use requirement for compliance base
on total building performance.
THERMAL DISTRIBUTION EFFICIENCY (TDE). The resistance to changes in air heat as air is conveyed thro
a distance of air duct. TDE is a heat loss calculation evaluating the difference in the heat of the air
between the air duct inlet and outlet caused by differences in temperatures between the air in the duc
and the duct material. TDE is expressed as a percent difference between the inlet and outlet heat in t
duct.
THERMAL ISOLATION. Physical and space conditioning separation fro |
11 |
pdf_text |
| 5 (cont. 2) |
s being located inside
conditioned space, such ducts shall comply with one of the following: |
31 |
pdf_text |
| 5 (cont. 3) |
m conditioned space(s). The
conditioned space(s) shall be controlled as separate zones for heating and cooling or conditioned by
separate equipment. |
11 |
pdf_text |
| 5.1 |
5.1
A drain water heat recovery unit(s) shall be installed, which captures
waste water heat from at least two showers, including tub/shower
combinations. It is acceptable, but not required, for sink water to be
connected. Unit shall have a minimum efficiency of 40% if installed for
equal flow or a minimum efficiency of 54% if installed for unequal flow.
Such units shall be rated in accordance with CSA B55.1 or IAPMO IGC |
52 |
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| 5.1 |
5.1. A continuous air barrier installed between unconditioned space and the duct. |
32 |
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| 5.2 |
5.2
For Compact Hot Water Distribution system credit, the volume shall
store not more than 16 ounces of water between the nearest source of
heated water and the termination of the fixture supply pipe where
calculated using Section R403.5.2. Construction documents shall
indicate the ounces of water in piping between the hot water source and
the termination of the fixture supply. When the hot water source is the
nearest primed plumbing loop or trunk, this must be primed with an On
Demand recirculation pump and must run a dedicated ambient return
line from the furthest fixture or end of loop to the water heater.
To qualify for this credit, the dwelling must have a minimum of 1.5
bathrooms. |
52 |
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| 5.2 |
5.2. Minimum R-10 insulation installed in the cavity width separating the duct from the outside
sheathing. |
32 |
pdf_text |
| 5.3 |
5.3
Water heating system shall include the following:
Energy Star rated gas or propane water heater with a minimum UEF of |
52 |
pdf_text |
| 5.3 |
5.3. The remainder of the cavity insulation shall be fully insulated to the drywall side.
R403.3.3 Ducts buried within ceiling insulation. Where supply and return air ducts are partially o
completely buried in ceiling insulation, such ducts shall comply with all of the following: |
32 |
pdf_text |
| 5.4 |
5.4
Water heating system shall include one of the following:
Energy Star rated gas or propane water heater with a minimum UEF of |
52 |
pdf_text |
| 5.5 |
5.5
Water heating system shall include one of the following:
Gas-fired heat pump water heater(s) meeting Tier 2 of the NEEA
Advanced Water Heating Specification for Gas-Fueled Residential
Storage Water Heaters Version 1.0.
or
For R-2 Occupancy, gas-fired heat pump water heater(s) meeting Tier 2
of the NEEA Advanced Water Heating Specification for Gas-Fueled
Residential Storage Water Heaters Version 1.0. shall supply domestic
hot water to all units.
or
For R-2 Occupancy, gas-fired heat pump water heater(s) meeting ANSI
Z21.40.2 and Z21.40.4 or CSA, with a minimum UEF of 1.15, shall
supply domestic hot water to all units.
To qualify to claim this credit, the building permit drawings shall specify
the option being selected and shall specify the water heater equipment
type and the minimum equipment efficiency and, for solar water heating
systems, the calculation of the minimum energy savings. |
53 |
pdf_text |
| 5.6 |
5.6
Water heating system shall include one of the following:
Electric heat pump water heater meeting the standards for Tier III of
NEEA's advanced water heating specification
or
For R-2 Occupancy, electric heat pump water heater(s), meeting the
standards for Tier III of NEEA's advanced water heating specification,
shall supply domestic hot water to all units. If one water heater is
serving more than one dwelling unit, all hot water supply and
recirculation piping shall be insulated with R-8 minimum pipe insulation.
To qualify to claim this credit, the building permit drawings shall specify
the option being selected and shall specify the water heater equipment
type and the minimum equipment efficiency. |
53 |
pdf_text |
| 5.7 |
5.7
Water heating system shall include one of the following:
Electric heat pump water heater with a minimum UEF of 2.9 and utilizing
a split system configuration with the air-to-refrigerant heat exchanger
located outdoors. Equipment shall meet Section 4, requirements for all
units, of the NEEA standard Advanced Water Heating Specification with
the UEF noted above
or
For R-2 Occupancy, electric heat pump water heater(s), meeting the
standards for Tier III of NEEA's advanced water heating specification
and utilizing a split system configuration with the air-to-refrigerant heat
exchanger located outdoors, shall supply domestic hot water to all units.
If one water heater is serving more than one dwelling unit, all hot water
supply and recirculation piping shall be insulated with R-8 minimum pipe
insulation.
To qualify to claim this credit, the building permit drawings shall specify
the option being selected and shall specify the water heater equipment
type and the minimum equipment efficiency. |
53 |
pdf_text |
| 5.8 |
5.8
Combination water heating and space heating system shall include one
of the following:
Gas-fired heat pump water heater(s) meeting Tier 2 of the NEEA
Advanced Water Heating Specification for Gas-Fueled Residential
Storage Water Heaters Version 1.0.
or
For R-2 Occupancy, gas-fired heat pump water heater(s) meeting Tier 2
of the NEEA Advanced Water Heating Specification for Gas-Fueled
Residential Storage Water Heaters Version 1.0., shall supply all units.
or
For R-2 Occupancy, gas-fired heat pump(s) meeting ANSI Z21.40.2 and
Z21.40.4 or CSA, with a minimum UEF of 1.15, shall supply all units.
To qualify to claim this credit, the building permit drawings shall specify
the option being selected and shall specify the water heater equipment
type and the minimum equipment efficiency and, for solar water heating
systems, the calculation of the minimum energy savings. |
54 |
pdf_text |
| 50 |
50 Pascals, or for R-2 Occupancies, optional compliance based on
Section R402.4.1.2: Reduce the tested air leakage to 0.20 cfm/ft2
maximum at 50 Pascals
and
All whole house ventilation requirements as determined by Section
M1505.3 of the International Residential Code or Section 403.8 of the
International Mechanical Code shall be met with a heat recovery
ventilation system with minimum sensible heat recovery efficiency of |
48 |
pdf_text |
| 50 |
50 percent glazed shall be permitted to satisfy the SHGC requirements.
R402.3.3 Glazed fenestration exemption. Up to 15 square feet (1.4 m2) of glazed fenestration per
dwelling unit shall be permitted to be exempt from U-factor and SHGC requirements in Section
R402.1.2. This exemption shall not apply to the Total UA alternative in Section R402.1.5.
R402.3.4 Opaque door exemption. One side-hinged opaque door assembly up to 24 square feet (
m2) in area is exempted from the U-factor requirement in Section R402.1.2. This exemption shall n
apply to Total UA alternative in Section R402.1.5. |
25 |
pdf_text |
| 50 |
50 Pascals, or for R-2 Occupancies, optional compliance based on
Section R402.4.1.2: Reduce the tested air leakage to 0.15 cfm/ft2
maximum at 50 Pascals
and
All whole house ventilation requirements as determined by Section
M1505.3 of the International Residential Code or Section 403.8 of the
International Mechanical Code shall be met with a heat recovery
ventilation system with minimum sensible heat recovery efficiency of |
49 |
pdf_text |
| 50 |
50 Pascals, or for R-2 Occupancies, optional compliance based on
Section R402.4.1.2: Reduce the tested air leakage to 0.25 cfm/ft2
maximum at 50 Pascals
and
All whole house ventilation requirements as determined by Section
M1505.3 of the International Residential Code or Section 403.8 of the
International Mechanical Code shall be met with a heat recovery
ventilation system with minimum sensible heat recovery efficiency of |
48 |
pdf_text |
| 500 |
500 New Jersey Avenue, NW |
64 |
pdf_text |
| 5060 |
5060 Spectrum Way
Mississauga, Ontario, Canada L4W 5N6
Standard
R
reference
number
Title
sectio
AAMA/WDMA/CSA |
63 |
pdf_text |
| 515.1 |
515.1—2012
IEEE Standard for the Testing, Design, Installation
and Maintenance of Electrical Resistance Trace Heating
for Commercial Applications ............................................................................. R
ISO
International Organization for Standardization |
64 |
pdf_text |
| 55.2 |
55.2 or IAPMO PS 92. Drain water heat recovery units shall be in accordance with CSA 55.1 or IAP
IGC 346-2017.
R403.5.5 Water heater installation location. Service hot water systems shall be installed within th
building thermal envelope.
Exceptions: |
34 |
pdf_text |
| 5B |
5B Walla Walla |
13 |
pdf_text |
| 5B |
5B Pend Oreille |
13 |
pdf_text |
| 6 |
6. Supply and return registers, if installed at the time of the test, shall be fully open.
Exception: Additions less than 500 square feet of conditioned floor area.
TABLE R402.4.1.1
AIR BARRIER, AIR SEALING AND INSULATION INSTALLATIONa
COMPONENT
AIR BARRIER CRITERIA
INSULATION CRITERIA
General Requirements
A continuous air barrier shall be installed
in the building envelope.
Breaks or joints in the air barrier shall be
sealed.
Air-permeable insulation shall not
used as a sealing material.
Cavity insulation installation |
27 |
pdf_text |
| 6 |
6. Where on-site photovoltaic panel systems have been installed, the array capacity, inverter
efficiency, panel tilt, orientation and estimated annual electrical generation shall be noted on th
certificate. |
19 |
pdf_text |
| 6 |
6. Compliance shall be demonstrated by providing a drawing on the plans that shows the hot water
distribution system rectangle(s), comparing the area of the rectangle(s) to the area of the dwelling
identifying the appropriate compactness ratio and HWDS factor. |
44 |
pdf_text |
| 6 |
6% glazed fenestration (22 in. x 8 in. lite)
– |
16 |
pdf_text |
| 6 |
6. Mechanical and service water heating system and equipment types, sizes and efficiencies. |
2 |
pdf_text |
| 6 |
6. RENEWABLE ELECTRIC ENERGY OPTION |
54 |
pdf_text |
| 6 |
6. Surface-applied window film installed on existing single pane fenestration assemblies to
reduce solar heat gain provided the code does not require the glazing fenestration to be
replaced.
R503.1.1.1 Replacement fenestration. Where some or all of an existing fenestration unit is repl
with a new fenestration product, including sash and glazing, the replacement fenestration unit sh
meet the applicable requirements for U-factor and SHGC in Table R402.1.3. Where more than o
replacement fenestration unit is being installed, an area-weighted average of the U-factor and SH
of all replacement fenestration shall be permitted to be used to demonstrate compliance.
R503.1.2 Heating and cooling systems. New heating, cooling and duct systems that are part of th
alteration shall comply with Section R403.
Exceptions: |
60 |
pdf_text |
| 6 |
6. When a site-specific report is not generated, the proposed design shall be based on the wo
case orientation and configuration of the rated home. |
38 |
pdf_text |
| 6 |
6. A final confirmed certificate indicating compliance based on inspection, and a statement
indicating that the confirmed rated design of the built home complies with Section R405.2.
certificate shall report the energy features that were confirmed to be in the home, including
component level insulation R-values or U-factors; results from any required duct system an
building envelope air leakage testing; and the type and rated efficiencies of the heating,
cooling, mechanical ventilation and service water-heating equipment installed. |
40 |
pdf_text |
| 6 (cont. 2) |
All cavities in the thermal envelope
shall be filled with insulation. The
density of the insulation shall be at
manufacturers' product
recommendation and said density
shall be maintained for all volume
each cavity. Batt type insulation wi
show no voids or gaps and maintai
an even density for the entire cavit
Batt insulation shall be installed in
recommended cavity depth. Wher
obstruction in the cavity due to
services, blocking, bracing or othe
obstruction exists, the batt product
be cut to fit the remaining depth of
cavity. Where the batt is cut aroun
obstructions, loose fill insulation sh
be placed to fill any surface or
concealed voids, and at the
manufacturers’ specified density.
Where faced batt is used, the
installation tabs must be stapled to
the face of the stud. There shall be
compression to the batt at the edg
of the cavity due to inset stapling
installation tabs.
Insulation that upon installation rea
conforms to available space shall
installed filling the entire cavity and
within the manufacturers' density
recommendation.
Ceiling/attic
The air barrier in any dropped ceiling/soffit
shall be aligned with the insulation and
any gaps in the air barrier sealed.
Access openings, drop down stair or knee
wall doors to unconditioned attic spaces
shall be sealed.
The insulation in any dropped
ceiling/soffit shall be aligned with t
air barrier
Batt insulation installed in attic roof
assemblies may be compressed at
exterior wall lines to allow for requ |
27 |
pdf_text |
| 6 (cont. 3) |
i
attic ventilation.
Walls
The junction of the foundation and sill
plate shall be sealed. The junction of the
top plate and top of exterior walls shall be
sealed. Knee walls shall be sealed.
Cavities within corners and header
frame walls shall be insulated by
completely filling the cavity with a
material having a thermal resistan
of R-3 per inch minimum.
Exterior thermal envelope insulatio
for framed walls shall be installed i
substantial contact and continuous
alignment with the air barrier. |
27 |
pdf_text |
| 6.1 |
6.1
For each 600 kWh of electrical generation per housing unit provided
annually by on-site wind or solar equipment a 0.5 credit shall be
allowed, up to 4.5 credits. Generation shall be calculated as follows:
For solar electric systems, the design shall be demonstrated to meet
this requirement using the National Renewable Energy Laboratory
calculator PVWATTs or alternative approved by the code official.
Documentation noting solar access shall be included on the plans.
For wind generation projects designs shall document annual power
generation based on the following factors:
The wind turbine power curve; average annual wind speed at the
site; frequency distribution of the wind speed at the site and height of
the tower.
To qualify to claim this credit, the building permit drawings shall specify
the option being selected and shall show the photovoltaic or wind
turbine equipment type, provide documentation of solar and wind
access, and include a calculation of the minimum annual energy power
production. |
54 |
pdf_text |
| 600 |
600 Pennsylvania Avenue NW
Washington, DC 20580
Standard
R
reference
number
Title
sectio
CFR Title 16—2015
R-value Rule ....................................................................................................... |
65 |
pdf_text |
| 6305 |
6305 Ivy Lane, Suite 140
Greenbelt, MD 20770
Standard
R
reference
number
Title
sectio |
65 |
pdf_text |
| 6t |
6th Floor
Washington, DC 20001
Standard
R
reference
number
Title
sectio
ANSI/APSP/ICC 14—2019
American National Standard for Portable Electric Spa Energy Efficiency .............
ANSI/APSP/ICC 15a— |
64 |
pdf_text |
| 7 |
7. The code edition under which the structure was permitted, and the compliance path used.
The code official may require that documentation for any required test results include an electronic
record of the time, date and location of the test. A date-stamped smart phone photo or air leakage tes
software may be used to satisfy this requirement. |
19 |
pdf_text |
| 7 |
7. Where on-site renewable energy systems have been installed, the certificate shall report th
type and production size of the installed system. Additional documentation reporting estima
annual energy production shall be provided.
R405.4 Calculation procedure. Calculations of the performance design shall be in accordance with
Sections R405.4.1 and R405.4.2.
R405.4.1 General. Except as specified by this section, the standard reference design and propose
design shall be configured and analyzed using identical methods and techniques.
R405.4.2 Residence specifications. The standard reference design and proposed design shall be
configured and analyzed as specified by Table R405.4.2(1). Table R405.4.2(1) shall include by
reference all notes contained in Table R402.1.3. |
40 |
pdf_text |
| 7 |
7. APPLIANCE PACKAGE OPTION |
54 |
pdf_text |
| 7 |
7. Equipment and systems controls |
2 |
pdf_text |
| 7.1 |
7.1
All of the following appliances shall be new and installed in the dwelling
unit and shall meet the following standards: |
54 |
pdf_text |
| 70 |
70—20
National Electrical Code ........................................................................................
NFRC
National Fenestration Rating Council, Inc. |
65 |
pdf_text |
| 8 |
8. Duct sealing, duct and pipe insulation and location. |
2 |
pdf_text |
| 9 |
9. Air sealing details.
R103.2.1 Building thermal envelope depiction. The building’s thermal envelope shall be represe
on the construction documents.
R103.3 Examination of documents. The code official shall examine or cause to be examined the
accompanying construction documents and shall ascertain whether the construction indicated and
described is in accordance with the requirements of this code and other pertinent laws or ordinances.
code official is authorized to utilize a registered design professional or other approved entity not affilia
with the building design or construction in conducting the review of the plans and specifications for
compliance with the code.
R103.3.1 Approval of construction documents. When the code official issues a permit where
construction documents are required, the construction documents shall be endorsed in writing and
stamped "Reviewed for Code Compliance." Such approved construction documents shall not be
changed, modified or altered without authorization from the code official. Work shall be done in
accordance with the approved construction documents.
One set of construction documents so reviewed shall be retained by the code official. The other se
shall be returned to the applicant, kept at the site of work and shall be open to inspection by the co
official or a duly authorized representative.
R103.3.2 Previous approvals. This code shall not require changes in the construction documents,
construction or designated occupancy o |
2 |
pdf_text |
| 9 (cont. 2) |
f a structure for which a lawful permit has been heretofore
issued or otherwise lawfully authorized, and the construction of which has been pursued in good fai
within 180 days after the effective date of this code and has not been abandoned.
R103.3.3 Phased approval. The code official shall have the authority to issue a permit for the
construction of part of an energy conservation system before the construction documents for the en
system have been submitted or approved, provided adequate information and detailed statements
been filed complying with all pertinent requirements of this code. The holders of such permit shall
proceed at their own risk without assurance that the permit for the entire energy conservation syste
will be granted. |
2 |
pdf_text |
| 905 |
905 Plum Street SE, Bldg 3
PO Box 43165
Olympia, WA 98506-3166
Standard
R
reference
number
Title
sectio
WSU RS 33
Duct Testing Standard for New and Existing Construction
Publication No. WSUEEP12-016 ...................................................................... R |
66 |
pdf_text |
| 916-18 |
916-18
Airflow Test Procedure .......................................................................................
ICC
International Code Council, Inc. |
64 |
pdf_text |