Energy Code Worksheet2018 Washington State Energy Code — Residential
Enerev Code Comoliance for All Climate Zones in
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
LS2-2394
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
SkylightU-Factor°
n/a
_ 0.50
;Glazed Fenestration SHGC bje
n/a
n/a
Ceiling a
49J
0.026
Wood Frame Wall gjh
21 int
0.056
Floor
30
0.029
Below Grade Wail `-h
10/15/21 int +TB
0.042
Slab "11 -Value & Depth
10, 2 it
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.
Lb
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- orjoist-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 S 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 Palh —Single Family 2018 Washington State Energy Cade -R
2018 Washington State Energy Code - Residential
Enerev Code Camnliance 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 #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
Heating
Options
Fuel Normalization Descriptions
Credits - select ONE
heating option
User Notes
1
Combustion heating minimum NAECA°
2
Heatpump`
3Electric
resistance heat only - furnaceor zonal
i&E
4
DHP with zonal electric resistance per option 3.45
All other heating systems
Energy
Options
Energy Credit Option Descriptions
Credits - select ONE
energy option from each
cate oryd
1.1
Efficient Building Envelope
0.5
❑
1.2
Efficient Building Envelope
1.0
❑
1.3
Efficient Building Envelope
Efficient Building Envelope
0.5
1.4
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
ED
2.2
Air Leakage Control and Efficient Ventilation
1.0
❑
_
2.3
Air Leakage Control and Efficient Ventilation
_
1.5
_
❑
�2 4 ._„
3.1a
Air Leakage Control and Efficient Ventilation
High Efficiency HVAC
2.0
1.0
❑
❑
3.2
High Efficiency HVAC
1.0
0
3.3a
High Efficiency HVAC
1.5
❑
3.4
High Efficiency HVAC _
1.5 _
❑
3.5
High Efficiency HVAC
1.5
❑
High Efficiency HVAC
2.0
❑
_ _3.60
4.1
High Efficiency HVAC Distribution System
0.5
__ _
❑
4.2
High Efficiency HVAC Distribution System
1.0
Q
Prescriptive Path -Single Family 2018 Washington State Energy Code -R
2018 Washington State Energy Code — Residential
Prescriptive EnerRY Code Compliance for All Climate Zones in Was
Summary of Table R406.2 (cont.)
Energy
Options
Energy Credit Option Descriptions (cont.)
Credits - select ONE
energy option from
each category
User Notes
51d
Water Heating
0.5
❑
_
5,2
_Efficient
Efficient Water Heating
0.5
❑
5.3
Efficient Water Heating
1.0 ___
❑
5.4
_
Efficient Water Heating
1.5
❑
5.5
_
Efficient Water Heating
_
2.0
❑
5.6
Efficient Water Heating
_
2.5
❑
6. le
Renewable Electric Energy (3 credits max)
1.0
7.1 Appliance Package
Total Credits
0.5
❑
6.0
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)
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 the complete Table R406.2 for all requirements and option descriptions.
Pleaseprint only pages 1 #hrough3 of thig worksheet for submission to your buiidingofficial.
Prescriptive Palh—Single Family 2078 Washington State Energy Code -R
Simple Heating System S(ze: Washington State
This heating system sizing calculator is based on the Prescriptive Requirements of the 2018 Washington Stale Energy Code (WSEC) and ACCA
Manuals J and S. This tool will calculate healing loads only. ACCA procedures for sizing cooling systems should be used to determine cooling loads.
Please complete the green drop -dooms
and boxes That are applicable 10 your project, As you make
selections in the drop -downs for each section, some
values will be calculated for you.
I(you
do not see the selection you need in the drop-down options,
please contact the WSU Energy Program al
energycode@energy.wsu.edu or
(360)
956-2042 for assistance.
Healing System Type: Owi ouw synems OO ueat wmp
To see detailed instructions for each section, place yourcursoron the word "Instructions"
Design Temperature
Instructions --- - - Design Temperature Difference (AT)
Aubum AT= Indoo/Ir0 degrees) - eufdoorpesrgn Temp
45
Arca of Building
Condllionod Floor Area
ensuncti°ns Conditioned Floor Area
(sq ft)
2,384'.
Average Ceiling Height
Conditioned
Volume
msrrncuons Average Ceiling Height
(fq
;.._._. _. tt.5 20,349
Glazing mxl Doors
U -Factor X Area
- UA
mstrncnons
•. -
u-o.za
0.280 357
99.96
Skylights
U•Factor X Area
UA
Instmctions
0.50
�
---
Insulation
Attic
U -Factor X Area
UA
Single Rafter or Joist
Vaulted Callings
U -Factor X Area
UA
Instructions
�" �e�ect aVaice
�
�
No Selection �
._
Above Grade Walls tee Fre°ra 11
U•Factor X Area
UA
0.055
2,4't�2
135.07
u mtermeaate
� �
Floors
U -Factor X Area
UA
mstrucaons
i -' -�
— -"
0.025
397,.
9.93
aoe�
Below Grade W811s
lsee F�svre f/
U -Factor X Area
UA
mstrnctr°ns sea a-vawe
®^
No selection
Slab Below Grade f,ee Flgp a 11 ___ _______
_ F -Factor X Length
UA
__
mstrnct ons
....
psee�t
.....
No selection �
---
c«dmwing
Slab on Grade ! ee
Frsvre n
F -Factor X Len th
UA
mstrncti°ns
se�eaa-varve
�
.�'
No selection 12fi:
Location of Ducts
Instructions ..� -
-
Duct Leakage CoeHlcient
conanwnm space
�
1.00
Sum of UA
282.24
Envelope Heat Load
12,701
Btu/Hour
R.gure t.
Sam of UAx dT
Atr Leakage Neat Load
9,890
Blu /Hour
Volumex O.ex ATx 0.018
nno�eeraae
Building Design Haat Load
22,590
e(u /Hour
"'�""'-�.�.,,,,,�
Airleakage+envelope heat loss
'��
Building and Duct Heat Load
22,590
Btu/Hour
Ducts in unconditioned space: sum oI huildinp heat loss x
1.10
Ducts In conditioned space: sum of 5uiltling heat loss x 1
Maximum Heat Equipment Output
28,238
Btu/Hour
evildinp and duct heat loss x 1.401or forced air larvate
evildino and duct heat loss x 1.25 for heat puma
(Ol/Of/f3J
Ref. U -factor
Exempt Swinging Door (24 sq. ft. max.)
Exempt Glazed Fenestration (15 sq, ft. max.)
Vertical Fenestration (Windows and doors)
Component
Width Height
Qt. Feet Inch Feet Inch
Width Height
Qt. Feet Inch Feet Inch
Area UA
0.0 0.00
0.0 0.00
I_RE=11_1
20.0
4.00
7.5
2.10
10.0
2.80
24.0
6.72
12.0
3.36
22.5
6.30
45.0
12.60
16.0
4.48
48.0
13.44
30.0
8.40
32.0
8.96
25.0
7.00
22.5
6.30
0.0
0.00
24.0
4.80
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
Sum of Vertical Fenestration Area and UA
Vertical Fenestration Area Weighted U = UA/Area
Overhead Glazing (Skylights)
Component
Width Height
Sum of Overhead Glazing Area and UA
Overhead Glazing Area Weighted U = UA/Area
Total Sum of FenesfratiOn Area and UA (for heafing 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
0.01
0.00
356.31 94.82
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
356.3 94.82