Energy Code Worksheet2018 Washinaton State Enerav Code — Residential
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
997B
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 11
All Climate Zones (Table R402.1.1)
R -Value '
U -Factor'
Fenestration U -Factor°
n/a
0.30
Skylight U -Factor b
n/a
0.50
Glazed Fenestration SHGC bj'
n/a
n/a
Ceiling'
491
0.026
Wood Frame Wall g•^
21 int
0.056
Floor
30
0.029
Below Grade Wall `'h
10/15/21 int + TB
0.042
Slab a*r 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
9
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
Enerev Code Compliance for All Climate Zones in
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 43
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
Heating
Options
Fuel Normalization Descriptions
Credits - select ONE
heating option
User Notes
1
Combustion heating minimum NAECA'
0.0
El
2
Heat pumps
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
Energy
Options
1.1
1.2
1.3
All other heating systems
Energy Credit Option Descriptions
--- ---------
Efficient Building Envelope
Efficient Building Envelope
Efficient Building Envelope
-1.0 ❑
Credits - select ONE
energy option from each
__.- category
0.5 ❑
1.0 ❑
0.5 ED
1.4
Efficient Building Envelope
1.0
❑
1.5
Efficient Building Envelope
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
2.3
Air Leakage Control and Efficient Ventilation
Air Leakage Control and Efficient Ventilation
1.0
1.5
❑
❑
2.4
Air Leakage Control and Efficient Ventilation
2.0
❑
3.1'
High Efficiency HVAC
1.0
3.2
High Efficiency HVAC
1.0
❑
3.3'
High Efficiency HVAC
1.5
❑
3.4_
High Efficiency HVAC
1.5
❑
_
3.5
High Efficiency HVAC
1.5
❑
3.6'
High Efficiency HVAC
2.0
❑
4.1
High Efficiency HVAC Distribution System
0.5
❑
4.2
High Efficiency HVAC Distribution System
1.0 I
❑
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)
Summary of Table R406.2 (cont.)
Energy
Options
Energy Credit Option Descriptions (cont.)
Credits" select ONE
energy option from
each category d
User Notes
5.1d
Efficient Water Heating
0.5
❑ _
5.2
Efficient Water Heating
_
0.5
❑
5.3
_
Efficient Water Heating
_
1.0
0
5.4
Efficient Water Heating
1.5
❑
5.5
_ _
Efficient Water Heating
2.0
❑
5.6
Efficient Water Heating
2.5
❑
6.1e
Renewable Electric Energy (3 credits max)
1.0
7.1 Appliance Package
Total Credits
0.5
❑
3.0 (
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)
cI 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 the complete Table R406.2 for all requirements and option descriptions.
Pleas,print:only;�agesthrough3 oftlis;worksheetfor. subinissiontoyour:buildingfficial.
Prescriptive Path —Single Family 2018 Washington Stale Energy Code -R
Size:
�.aling system sizing calculator is based on the Prescriptive Requirements of the 2018 Washington
Slate Energy Code (WSEC)
and ACCA
Is J and S. This tool will calculate healing
loads only. ACCA procedures for sizing cooling systems
should be used to determine
cooling loads.
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
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
:ode@energy.tvsu.edu or
(360)
950-2042 for assistance.
--�--- -_���- -- �---�_=�=
Design Temperature Difference
IIeatingSystem7ype; Oaiouwsy:term
OHeatCump
To see detailed instructions for each section, place your cursor on the word "Inshuctions"
Design'feinperatrire
insPrucuo �s
--�--- -_���- -- �---�_=�=
Design Temperature Difference
(r1T)
50
Spanaway
eT=lydoor oae
(] grees)-Outdoor Design Temp
Area of kluilding
Conditioned Floor Area
�°str"°��°"` Conditioned FloorArea (sq fl)
,�......,; _
Average Ceiling Height
Conditioned Volume
�"sl"„��°nF Average Ceiling Height (g)
7,076
_ °,
Glazing and Doors
U -Factor X Area -
UA
iisu�amnc
y,----,_ --_.— w�
u-0.zs
0.280 _
40.88
Skylights
U -Factor X Area -
UA
mco-cmion.e
0.50 �
---
InSlllnllt7n
Attic _
U -Factor X Area
UA
t}e,tn�aiois
�,� _u.,��
nas�y�
0.026
25.92
Single Rafter or Joist Vaulted Ceilings
__ U -Factor X Area
UA
nsunol o s ... -�-- . .---'--°.-�,N�.�
se�ect a -v iue
No selectbn =v -�
Above Grade Walls( oFlgu 9
U -Factor X Area
UA
t-trucnons
____ _
�a zl lore ee c �
0.056
57.23
Floors
U -Factor X Area
UA
imtruct ons
"«`-'- .,�.._..-=—,----.... -..
a 3s
0.025
24.93
Below Grade Walls( eFrs� t/
U•Factor X Area
UA
inco-r ;e ons
se,ea awai � "°
No selection
---
Slab Below GradeL
aFigurefL _
_ F -Factor X Length
UA
sixt cwm naury
. No selection
�.
__
Slab on Grade / Fray �_,,,,,
_ F -Factor X Length
UA
tnelmovo"c se'�eaa-varve � �
NoseleGion
---
Location of Ducts
,
� ts1f "�i01Y5 � " �-` -"""" -
Duct Lockage Coefllclent
cam uarea space
1.00
Sum of UA
tgg,gg
Envelope Heat Load
7,448
elu/Hour
`i��
Sum oI UA x dT
Alr leakage Heat Load
4,307
elu /Hour
Volumex 0.5x eTx 0.018
ano�e e.aae
Building Design Heat Load
11,755
Btu/Hour
'""^�-..„�,
Alrleakage+envelope heat loss
„..._..�,�-z"""�� �
Building and Duct Heat Load
11,755
elu/Hour
Ducts in unconditioned space: sum oJbuilding heat loss x
1.10
Ducts /n cronditioned space: sum of building
heat loss x 1
Maximum Heat Equipment Output
14,694
Blu/Hour
Building and duct heat loss x 1.401or forced
airlarvate
Buildinv and duct heat loss x 1.251or heat puma
(OJ/Of/f3J
Window, Skylight and Door Schedule
Vertical Fenestration (Windows and doers)
Component
Width Height
Area UA
20.0
4.00
0.0
0.00
Area UA
20.0
5.60
30.0
8.40
20.0
5.60
12.0
3.36
20.0
5.60
6.0
1.68
0.0
0.00
17.8
3.56
0.0
0.00
0.0
0.00
0.0
0.00
0.0
0.00
0.0
0.00
0.0
0.00
0.0
0.00
0.0
0.00
0.0
0.00
0.0
0.00
0.0
0.00
0.0
0.00
0.0
0.00
0.0
0.00
0.0
0.00
0.0
0.00
0.0
0.00
0.0
0.00
0.0
0.00
0.0
0.00
0.0
0.00
0.0
0.00
0.0
0.00
0.0
0.00
0.0
0.00
0.0
0.00
0.0
0.00
Overhead Glazing (Skylights)
Component
Sum o/Vertical Fenestration Area and UA
Vertical Fenestration Area Weighted U = UA/Area
Width Height
Qt. Feet Inch Feet Inch
Sum of Overhead Glazing Area and UA
Overhead Glazing Area Weighted U = UA/Area
Total Sum of Fenestration Area and UA (for heating system sizing calculations)
0.0
0.00
0.0
0.00
0.0
0.00
0.0
0.00
0.0
0.00
0.0
0.00
0.0
0.00
125,81 33.80
0.27
Area UA
0.0
0.00
0.0
0.00
0.0
0.00
0.0
0.00
0.0
0.00
0.0
0.00
0.0 0.00
0.00
145.8 37.80