Energy Code Worksheet2018 Washington State Energy Code - Residential
Energy Code Compliance 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
L1-1255
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,
Representative
Date
All Climate Zones (Table R402.1.1)
`-._ - _ R -Values U -Factors
Fenestration U-Factorb
n/a
_
0.30
.Skylight U_ Factor a
_
n/a -
_
0.50
jGlazed Fenestration SHGC ",'
n/a
_ _
n/a
Ceiling_e -._ _..
_.._ .__ 491
..._0.026
l Wood Frame Wall e•h
21 int
I 0.056
_Floor _ __
30
0.029
;Below Grade Wall `•h
10/15/21 int
_
0.042
Slab df R -Value & Depth
_ _+TB
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.
b
The fenestration U- factor column excludes skylights.
"10/15/21 +STB" 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 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 -d— 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 Siate Energy Code -R
2018 Washington State Energy Code - Residential
EnerRv 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 Ni or N3
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
--
-mini
Credits - select ONE
heating option
User Notes
1
Combustion heating mum 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
Options
p
Energy Credit Option Descriptions
Credits -select ONE
energy option from each
category_
1.1
Efficient Building Envelope
0.5
❑
1.2
Efficient Building Envelope
1.0
1.3
Efficient Building Envelope
0.5
_❑
El
1.4
_
Efficient Building Envelope
1.0
❑
1,5
Efficient Building Envelope
2.0
❑
1 6
Efficient Budding Envelope
3.0
❑
1 7
Efficient Budding Envelope
0.5,
2.1
22 -
2.3
Air Leakage Control and Efficient Ventilation
Air Leakage Control and Efficient Ventilation
Air Leakage Control and Efficient Ventilation
0.5
1.0
1.5
❑
❑
❑
Air Leakage Control and Efficient Ventilation
2.0
El3.1a
N2.4
iciency HVAC High Eff
1.0
❑
3.2
High Efficiency HVAC
1.0
❑
3.33
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
El
4.1
High Efficiency HVAC Distribution System
_
0.5
❑
4.2
High Efficiency HVAC Distribution System
1.0 1
❑
Prescriptive Path -Single Family 2018 Washington State Energy Code -R
2018 Washington State Energy Code — Residential
Energy Code Compliance for All Climate Zones in
Energy
Options
_.-
5.1d
Summary of Table
Energy Credit Option Descriptions (cont.)
Efficient Water Heating
R406.2 (cont,)
Credits -select ONE - -
energy option from User Notes
each c_atego� -.,-
❑
j 5.2
5.3
5A
Efficient Water Heating
Efficient Water Heating
Efficient Water Heating
_77,0.5
_
0.5
1.0
1.5
_
❑
❑
❑
5 5
Efficient Water Heating
_
_
2.0
❑
5.6
Efficient Water Heating_ -
_
2.5
_
❑
I_ 6 1
Renewable Electric Energy (3
credits max)
1.0
71
Appliance Package
0.5
❑
Total Credits
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)
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.
Please prink Qniy. pages 1through 3�of this worksheet for submission;to yourbuilding o�cial.
Prescdptive Palh —Single Fatuity 2018 Washinglon Stale Energy Code -R
Size:
heating system sizing
calculator is based on the Prescriptive Requirements of the 2018 Washington
Slate Energy Code (WSEC)
and ACCA
fats J and S. This tool
will calculate heating 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-dovrn
options,
please contact the WSU Energy Program al
code@energy.vrsu.edu or
(360)
956-2042 for assistance.
BuIlding and Duct Heal Load 16,048
elu/Hour
To see detailed instructions for each section, place yourcursor on the word "Instructions"
Design Temperature
Blu /Hour
Sum o7 UA x AT
Alr Leakage Heat Load 6,099
Incur coons
---- -- -- -�_:.
�
Design Temperature Difference
(4n
Alr leakage +envelope heat loss
Spanaway
_... _....
BuIlding and Duct Heal Load 16,048
elu/Hour
dT=lrMoor(]O degrees)-Ovfdoor Desyn Temp
Area of Building
Maximum Heat Equipmont Output 20,059
Blu /Hour
Building and duct heat lossx 1.401or forced air lumace
Conditioned Floor Area
Building and duct heat loss x 1.25 for heat pump
Instruct ons Conditioned Floor Area (sq H)
1,255'^
Average Ceiling Height
Conditioned Volume
Instrualons Average Ceiling Height (H)
9:;p
11,295
Glazing mxi Doors
U -Factor
-
X Area -
UA
mstrualons
—�
u o as
0.280
190;
53.20
Skylights
U•Factor
X Area -
UA
mstrucu°"s
0.50
0
---
Insulation
Attic
U -Factor
X Area
UA
mstrucuons
-`--��
R-49
0.026
1,255 7
0
32.63
Single Rafter or Joist
U•Factor
X Area
UA
Vaulted Callings
msuuamns
`y Berea a -vacuo
No selection
�
---
Above Grade Walls / ee Fra re r/
U -Factor
X Area
UA
Inslrucuore
'' R -z1 mcem dram
.`
0.056
1;460
81.76
Floors
U -Factor
X Aroa
UA
Instructions
—'��
0.025
31.38
R-38
,1,255
Below Grade Walls
(:ea Fiaora �/
U -Factor
X Area
UA
Insuuamns
�
®
No selection
ss li tR Va ua
Slab Below Grade
(:ee Fiao rr _ _
F -Factor
X Le�
UA
msvuaions
se�ea mna�aonrrg "-"" -
No selection
---
Slab on Grade ( eFraure
F -Factor
X Le�
UA
11_
msrrucu°ns
se�eaRvarue �` �
®`�
No selection
---
Locatiat of Ducts
Instrucuons -. -
"'
Duct
Leakage Coefficient
cond�uonee s�co
.
1.00
Sum
of UA
198.97
Fioure 1.
'a,o�e c,aae ,.
"„�«,a
,.-��.�
50
Envelope Heat Load 9,948
Blu /Hour
Sum o7 UA x AT
Alr Leakage Heat Load 6,099
Btu/Hour
Volumex 0.ex dTx 0.018
BuIlding Design Heat Load 16,048
Blu /Hour
Alr leakage +envelope heat loss
BuIlding and Duct Heal Load 16,048
elu/Hour
Ducts in unconditioned space: sum of building heat loss x 1.10
Ducts In conditioned space: sum oI building heat loss x 1
Maximum Heat Equipmont Output 20,059
Blu /Hour
Building and duct heat lossx 1.401or forced air lumace
Building and duct heat loss x 1.25 for heat pump
(Ol/pl/f3J
Window, Skylight and Door Schedule
Project Information
Ref. U -factor
Exempt Swinging Door (24 sq. ft. max.)
Exempt Glazed Fenestration (15 sq, ft. max.)
Vertical Fenestration (Windows and doors)
Component
Contact Information
Width Height
Area UA
20.01
4.00
0,01
0.00
Area UA
8.0
2.24
16.0
4.48
25.0
7.00
25.0
7.00
30.0
8.40
36.0
10.08
12.0
3.36
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
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 Fenestration AYea 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
0,01
0.00
169,81 46.12
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
189.8 50.12