313 Jefferson Prescriptive Worksheet2018 Washington State Energy Code — Residential
Prescriptive Energy Code Compliance for All Climate Zones in Washington
Multifamily (pffpr*ivp Fahruary 1 2011 Version 1.1'
These requirements apply to Group R-2 buildings three stories or less in height above grade plane.
Other Group R-2 buildings must comply with the commercial energy code.
Project Information Contact In ormation
313 Jefferson Ave NE Mountain Terrace Builders
Yelm WA 98597 360-458-1502
Instructions: This multifamily 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 S . Q)L-12
All Climate Zones (Table R402.1.1)
R -Value a
U -Factor a
Fenestration U -Factor b
n/a
0.30
Skylight U -Factor
n/a
0.50
Glazed Fenestration SHGC s,e
n/a
_ n/a
Ceiling e
49
0.026
Wood Frame Wall g.h
21 int
0.056
Floor
30
0.029
Below Grade Wall',h
10115 21 int +TB0.042
Slab
d,f R -Value & Depth
10, 2 ft
-
nja
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 +5T13" 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- orjoist-vaulted ceilings, the insulation may be reduced to R-38 if the full insulation depth extends
e
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.
For Building Officials Only
Prescriptive Path — Mulfifamily 2018 Washington State Energy Code -R
2028 Washington State Energy Cade - Residential
Prescriptive Energy Code Compliance for All Climate Zones in Washington
Multifamily (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) so as to achieve the following minimum number of credits:
+ Multifamily R2 Dwelling Unit: 4.5 credits
Before selecting your credits on this Summary table, review the details in Table 406.3 (Multifamily), on page 3.
Summa Table
R406.2 and 406.3
Heating
Options
Fuel Normalization Descriptions
Credits - select ONE
heating option
User Notes
1
Combustion heating minimum NAECAI
❑
2
Heat pump`
❑*
3
_
Electric resistance heat only - furnace or zonal
;na
❑
4
DHP with zonal electric resistance per option 3.4_
❑
5
All other heating systems
-0.5
❑
Energy
Options
Energy Credit Option Descriptions
Credits - select ONE
energy option from each
category d
1.1
Efficient Building Envelope
0.5'-
❑
1.2
Efficient Building Envelope
1.0
Q
1.4
Efficient Building Envelope
1.0
❑
1.5
Efficient Building Envelope
1.5
❑
1.6
1.7
Efficient Building Envelope
Efficient Building Envelope
2.0
0.5
❑
❑
2.1
Air Leakage Control and Efficient Ventilation
1.0
❑_
2.2
Air Leakage Control and Efficient Ventilation
1.5
❑
2.3
2.4
Air Leakage Control and Efficient Ventilation
Air Leakage Control and Efficient Ventilation
2.0
2.5
❑
❑
3.1a
3.3'
High Efficiency HVAC
High Efficiency HVAC
1.0
1.0
❑
❑
3.4
High Efficiency HVAC
2.0
Q
3,6a
High Efficiency HVAC
3.0
❑
4.1
High Efficiency HVAC Distribution System
0.5
❑
5.1'
Efficient Water Heatm&
0.5
5.2
Efficient Water Heating
0.5
Q
5.3
Efficient Water Heating
1.0
❑
5.4
5.5
Efficient Water Heating
Efficient Water Heating
2.0
2.5
❑
❑
5.6
6.1e
7.1
Efficient Water Heating
Renewable Electric Energy (3 credits max)
Appliance Package
3.0
1.0
1.5
❑
❑
Total Credits
4:5
Clear Farm
a. An alternative heating source sized at a maximum of 0.5 W/st (equivalent) of heated tloor 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. See Table 406.3.
e. 1.0 credit for each 1,200 kWh of electrical generation provided annually, up to 3 credits max. See Table R406.2 for
full requirements and complete 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 and 2 of this worksheet for submission to your building ° official.
Prescriptive Path - Multifamily 2018 Washington State Energy Code -R