REVIEWED RESUB1 BLD2024-0152+WSEC+3.27.2024_11.51.14_AM+41602442018 Washington State Energy Code - Residential
Prescriptive Energy Code Compliance for All Climate Zones in Washington
Sinele Familv — New & Additions (effective February 1, 2021) version 1.2
These requirements apply to all IRC building types, including detached one- and two-family
dwellings and multiple single-family dwellings (townhouses).
Project Information
Master bath/garge addition
Contact Information
Devon Schmaus
chmausd mail.com / 425.478.0850
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
All Climate Zones Table R402.1.1
_
R-Value a
U-Factor a
Fenestration U-Factor b
n/a
0.30
Skylight U-Factor b
n/a
0.50
Fenestration SHGC b,e
n/a
n/a
_Glazed
Ceiling a
49
0.026
Wood Frame Wall g,h
21 int
0.056
Floor
30
0.029
Below Grade Wall `,h
10/15/21 int+TB
0.042
Slab d, R-Value & Depth
10, 2 ft
n/a
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
The fenestration U-factor column excludes skylights.
"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
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"
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.
For single rafter- or joist -vaulted ceilings, the insulation may be reduced to R-38 if the full insulation depth
e
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.
For log structures developed in compliance with Standard ICC 400, log walls shall meet the requirements for
g climate zone 5 of ICC 400.
Int. (intermediate framing) denotes framing and insulation as described in Section A103.2.2 including standard
h
framing 16 inches on center, 78% of the wall cavity insulated and headers insulated with a minimum of R-10
insulation.
Prescriptive Path — Single Family 2018 Washington State Energy Code-R
2018 Washington State 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 Unit: 3 credits
Dwelling units less than 1,500 sf in conditioned floor area with less than 300 sf of fenestration area.
Additions to existing building that are greater than 500 sf of heated floor area but less than 1,500 sf.
2. Medium Dwelling Unit: 6 credits
All dwelling units that are not included in #1 or #3
3. Large Dwelling Unit: 7 credits
Dwelling units exceeding 5,000 sf of conditioned floor area
4. Additions less than 500 square feet: 1.5 credits
All other additions shall meet 1-3 above
Before selecting your credits on this Summary table, review the details in Table 406.3 (Single Family), on page 4.
Summary of Table R406.2 and 406.3
Heating
Options
P
Fuel Normalization Descriptions
Credits - select ONE
heating option
User Notes
1
Combustion heating minimum NAECAb
0.0
❑
2
Heat pump`
1.0
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
Energy Credit Option Descriptions
Efficient Building Envelope
Efficient Building Envelope
Efficient Building Envelope
Efficient Building Envelope
Efficient Building Envelope
-1.0
❑
Energy
Options
P
Credits - select ONE
energy option from each
category
1.1
0.5
0
1.2
1.0
❑
1.3
0.5
❑
1.4
1.0
❑
1.5
2.0
❑
1.6
Efficient Building Envelope
3.0
❑
1.7
Efficient Building Envelope
0.5
❑
2.1
Air Leakage Control and Efficient Ventilation
0.5
❑
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 Li
2.0
❑
3.1'
High Efficiency HVAC
1.0
❑
3.2
High Efficiency HVAC
1.0
❑
3.3a
High Efficiency HVAC
1.5
❑
3.4
High Efficiency HVAC
1.5
❑
3.5.1
High Efficiency HVAC
1.5
❑
3.5.2
High Efficiency HVAC
1.5
0
3.6a
High Efficiency HVAC
High Efficiency HVAC Distribution System
2.0
❑
4.1
0.5
❑
4.2 High Efficiency HVAC Distribution System U 1.0 ❑
Prescriptive Path - Single Family 2018 Washington State Energy Code-R
Energy
Options
5.1'
5.2
5.3
5.4
5.5
5.6
6.1e
7.1
2018 Washington State Energy Code — Residential
Prescriptive Energy Code Compliance for All Climate Zones in Washington
Single Family — New & Additions (effective February 1, 2021)
Summary of Table R406.2 (cont.)
Credits -select ONE
Energy Credit Option Descriptions (cont.) energy option from
Efficient Water Heating
Efficient Water Heating
Efficient Water Heating
Efficient Water Heating
Efficient Water Heating
Efficient Water Heating
Renewable Electric Energy (3 credits max)
Appliance Package
each category
d
0.5
0.5
❑
❑
1.0
0
❑
❑
1.5
2.0
2.5
❑
1.0
Q
0.5
❑
Total Credits I 1 4.0
User Notes
Clear Form
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 S. Option 5.1 may be combined
with options 5.2 through 5.6. See 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.
Please print only pages 1 through 3 of this worksheet for submission to your building official.
For Building Officials Only
Prescriptive Path — Single Family 2018 Washington State Energy Cade-R 3
simple Heating System size: wasnington state
This heating system sizing calculator is based on the Prescriptive Requirements of the 2018 Washington State Energy Code (WSEC) . This tool will calculate
heating loads only. ACCA procedures for sizing cooling systems should be used to determine cooling loads.
Please complete the green drop -downs and boxes that are applicable to your project. As you make selections in the drop -downs for each section, some values will
be calculated for you. If you do not see the selection you need in the drop -down options, please contact the WSU Energy Program at energycode@energy.wsu.edu
or (360) 956-2042 for assistance.
tool is for the permitting purposes only. A Manual J calculation is required to meet the requirement of the 2018 Washington State Energy Code.
Project Information Contact Intormation
Garage/master addition Devon Schmaus
schmausd@gmail.com
425.478.0850
Heating System Type: OAu other systems *Heat Pump
To see detailed instructions for each section, place your cursor on the word "Instructions"
Design Temperature Deisgn Temperature 24
Instructions Edmonds Design Temperature Difference (AT) 46
AT = Indoor (70 degrees) - Outdoor Design Temp
Area of Building
Conditioned Floor Area
Instructions Conditioned Floor Area (sq ft)
Average Ceiling Height
Instructions Average Ceiling Height (ft)
Glazing and Doors
Instructions 1.1-0,28
Skylights
Instructions
insulation
Attic
Instructions R-49
Single Rafter or Joist Vaulted Ceilings
Instructions I R-49 Advanced
Above Grade Walls (see Figure 1)
Instructions I.R.21 Intermediate
Floors
Instructions [No Floors above unconditioned spaces.
Below Grade Walls and Slabs (see Figure 1)
Instructions Wall & Slab 1,R10 Foam Ext
Depth3.5' depth
Slab on Grade (see Figure 1)
Instructions I R-10 Fully Insulated
Location of Ducts
Instructions Id
Figure 1.
Above Grade
879,
Conditioned Volume
8.5
7,472
U-Factor
X
Area =
UA
0.280
13
3.58
U-Factor
X
Area =
UA
0.50
0.00
U-Factor
X
Area =
UA
0.026
957
24.88
U-Factor
X
Area
UA
0.020
477
9.54
U-Factor
X
Area
UA
0.056
1,921
107.58
U-Factor
X
Area
UA
Wall U-Factor
X
Area
UA
0.075
378
28.35
Slab F-Factor
X
Length
UA
0.520
120
62.40
F-Factor
X
Length
UA
0.360
120
43.20
Duct Leakage Coefficient
Select duct location
Sum of UA
279.53
Envelope Heat Load 12,858 Btu / Hour
Sum of UA x AT
Air Leakage Heat Load 3,712 Btu / Hour
Volume x 0.6 x AT x 0.018
Building Design Heat Load 16,570 Btu / Hour
Air leakaqe + envelope heat loss
Building and Duct Heat Load Btu / Hour
Ducts in unconditioned space: sum of buildina heat loss x 1.10
Ducts in conditioned space: sum of building heat loss x 1
Maximum Heat Equipment Output Btu / Hour
Buildina and duct heat loss x 1.40 for forced air furnace
Buildina and duct heat loss x 1.25 for heat Dump
(07101113)
indow, Skylight and Door Schedule
oject Information
;hmaus Addition (Garage and master)
Contact Information
Devon Schmaus
425.478.0850
schmausd@gmail.com
Width Height
Ref. U-factor Qt. Feet Inch Feet Inch Area UA
<empt Swinging Door (24 sq. ft. max.) 1 0.01 0.00
Exempt Glazed Fenestration (15 sq. ft. 1 0.0 0.00
?rtical Fenestration (Windows and doors)
Component
Width Height
Qt. Feet Inch Feet Inch
1 1
133
157
1
21
33
1
12
27
1
21
33
1
30
136
1
33
45
1
15
21
1
9
21
verhead Glazing (Skylights)
Component
Width Height
ELM�.
Sum of Overhead Glazing Area and UA 0.0 0.00
Overhead Glazing Area Weighted U = UA/Area 0.00
total Sum of Fenestration Area and UA (for heating system sizing calculations) 1 46.31 12.80
Sum of Overhead Glazing Area and UA 0.0 0.00
Overhead Glazing Area Weighted U = UA/Area 0.00
total Sum of Fenestration Area and UA (for heating system sizing calculations) 1 46.31 12.80