REVIEWED BLD2022-0797+Energy_Calculations+6.19.2022_11.53.50_AM+2941071RECEIVED BLD2022-0797 REVIEWED -
Jul 11 2022 CITY OF EDMONDS
CITY OF EDMONDS 2018 Washington State Energy Code - Residential
DEVELOPMENT SERVICES Prescriptive Energy Code Compliance for All Climate Zones in Washington
DEPARTMENT Single Family - New & Additions (effective February 1, 2021) Version 1.1
These requirements apply to all IRC building types, including detached one- and two-family
dwellings and multiple single-family dwellings (townhouses).
Project Information Contact Information
ON i CB L ,t S Z06 - '1-22.1j t ✓ - ti - 2
17-IE571 90 G ViL'9 6AlD5 IN
Instructions: This single-family project will use the requirements of the Prescriptive Path below and
incorporate the minimum values listed. Based on the size of the structure, the appropriate number of
additional credits are checked as chosen by the permit applicant.
Provide all information from the following tables as building permit drawings: Table R402.1- Insulation and
Fenestration Requirements by Component, Table R406.2 - Fuel Normalization Credits and 406,3 - Energy Credits.
Authorized Representative Date
Fenestration U-Factor'
Skylight U-Factor b
Glazed Fenestration SHGC b,e
Wood Frame W
_ All Climate Zones (Table R402.1.1) -
R-Value a U-Factor '
n/a
n/a
n/a
49
21 int
0.30
0,50
0.026
0 056
Floor 30 0.021)
Below Grade Wall h 10/15/21 in t TB 0.042
Slab , R-Value & Depth— 10, 2 ft nia
i R-values are minimums. U-factors and SHGC are maximums. When insulation is installed in a cavity that is less
a 'than the label or design thickness of the insulation, the compressed R-value of the insulation from Appendix
Table A101.4 shall not be less than the R-value specified in the table.
b IThe fenestration U-factor column excludes
1 "10/15/21 +5TB" means R-10 continuous insulation on the exterior of the wall, or R-15 continuous insulation on
!the interior of the wall, or R-21 cavity insulation plus a thermal break between the slab and the basement wall at
c I 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 of the wall. "5TB"
1 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 depth
extends over the top plate of the exterior wall
R-7.5 continuous insulation installed over an existing slab is deemed to be equivalent to the required perimeter
f slab insulation when applied to existing slabs complying with Section R503.1.1. If foam plastic is used, it shall
meet the requirements for thermal barriers protecting foam plastics.
gfor log structures developed in compliance with Standard ICC 400, log walls shall meet the requirements for
I climate zone 5 of ICC 400.
Int. (intermediate framing) denotes framing and insulation as described in Section A103.2.2 including standard
h 1 framing 16 inches on center, 78%of the wall cavity insulated and headers insulated with a minimum of R-10
I
j insulation.
Prescriptive Path - Single Family 2018 Washington State Energy Code-R
2018 Washington Stote Energy Code - Residential
Prescriptive Energy Code Compliance for All Climate Zones in Washington
Single Family- New & Additions (effective February 1, 2021)
Each dwelling unit in a residential building shall comply with sufficient options from Table R406.2 (fuel
normalization credits) and Table 406.3 (energy credits) to achieve the following minimum number of
credits. To claim this credit, the building permit drawings shall specify the option selected and the
maximum tested building air leakage, and show the qualifying ventilation system and its control sequence
of operation.
1. Small Dwelling Inif-."l-cre-drilts
vnff�
I* Dwelling units le�� L. Of in conditioned floor area with less than 300 sf of fenestration area.
n fraIIIII
Additions to existing building that are greater than 500 sf of heated floor area but less than 1,500 sf.
Medium Dwelling Unit: 6 credits
All dwelling units that are not included in #1 or #3
3. Large Dwelling Unit: f' credits
Dwelling units exceeding 5,000 5f of conditioned floor area
4. Additions less than 500 square feet: L.-t) credits
All other additions shall meet 1-3 above
Before selecting your credits on thi,5 Surnmiary table, review the details in Table 406,3 (Single Family), on page 4.
Summary of
Table R406.2 and 406.3
Heating
Fuel Normalization Descriptions
Credits - select ONE User Notes
heating option
Options
1
Combustion heating minimum NAECAb
0.0
❑
2
Heat pump'
1.0
❑
3
Electric resistance heat only - furnace or zonal
-1.0
❑
4
DHP with zonal electric resistance per option 3.4
0.5
❑
5
All other heating systems
-1.0
❑
Energy
Credits - select
ONE
Energy Credit Option Descriptions
energy option from
each
Options
cate ory
9
1.1
Efficient Building Envelope
0.5
❑
1.2
Efficient Building Envelope
1.0
❑
1 1.3
Efficient Building Envelope
0.5
[�
1.4
Efficient Building Envelope
1.0
❑
1.5
Efficient Building Envelope
2.0
El
1.6
Efficient Building Erwelope 3.0
13
El
1.7
Efficient Building Envelope
05
❑2.1
Air Leakage Control and Efficient Ventilation
0.5
C7
2.2
Air Leakage Control and Efficient Ventilation
1.0
❑
2-3
Air Leakage Control and Efficient Ventilation
1.5
❑
2.4
Air Leakage Control and Efficient Ventilation
2.0
0
3.11
Hi Efficiency HVAC
1.0
o
3.2
High Efficiency HVAC
1.0
06"
3.31
High Efficiency HVAC
1.5
❑
3.4
High Efficient HVAC
-1.5
❑
3.5
High Efficiency HVAC
1.5
C3
4.1 i High Efficiency HVAC Distribution System
4.2 High Efficiency HVAC Distribution System
Prescriptive Path - Singlo Family 2018 Washington State P-nergy Coda-P
2018 ``osh�;nation Stott M "erg Cope —Res r'��E=,nt 'c-7,'
Prescriptive Energy Code Compliance forAllClimate Zones in Washington
Single Family -- New & Additions (effective February 1, 2021)
Summary of Table R406.2 (cons.) _
Ener Credits • select ONE �
gY Energy Credit Option Descriptions (cunt.) energy option from User Notes
Options each category a
5Ad 'Efficient Water Hearin - _------------ 0.5 ❑
�5.2 Efficient Water Heating 0.5 ❑
5.3 'Efficient Water Heating 1.0 M
5.4 Efficient Water Heating 1.5 ❑
5.5 Efficient Water Heating 2.Q P S
5.6 Efficient Water Heating
6. le Renewable Electric Energy (3 credits max) 1 '0
7.1 Appliance Packa a 0,5
Total Credits 7C.Siculate Total Cie-ar of
a. An alternative heating source sized at a maximum of 0.5 W/sf (equivalent) of heated floor area or 500 W,
whichever is bigger, may be installed in the dwelling unit.
b. Equipment listed in Table C403.3.2(4) or C403.3.2(5)
c. Equipment listed in Table C403.3.2(1) or C403.3.2(2)
d. You cannot select more than one option from any category EXCEPT in category 5. Option 5.1 may be combined
with options 5.2 through 5.6.5ee Table 406.3.
e. 1.0 credit for each 1,200 kWh of electrical generation provided annually, up to 3 credits max.
See the complete Table R406.2 for all requirements and option descriptions.
f- Use the single radiobutton in the upper right of the second column to deselect radiobuttons in that group.
Prescriptive Path -- Single Family 2018 Washington State Energy Code-R 3