Energy Code Worksheet2018 Washington State Energy Code — Residential
Energv 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).
I� Project Information Contact Information
1437 ---- -
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 I Date
', _ All Climate Zones (Table R402.1.1)_
R•Value a
1.1—Factor'
Fenestration U Factor "
- -
_
n/a
0.30
Skylight U -Factor b
_
n/a
0.50
jGlazed Fenestration SHGC bje
n/a
n/a
Ceiling a ---
49 i -
---
0.026
Wood Frame Wall gih
_--
21 int
_--
_
0.056
Floor
_
30
0.029
_
_
Below Grade Wall c•h 10/15/21 int +TB 0.042
Slab ','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
the label or design thickness of the insulation, the compressed R -value of the insulation from Appendix
kathan
Table A101.4 shall not be less than the R -value specified in the table,
b
The fenestration U -factor column exdudes skylights
r__
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. "STVmeans
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.
Ffor
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 regwred 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 4103.2.2 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 Pafh —Single Family 2018 Washington Stale Energy Code -R
2018 Washington State Energy Code - Residential
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
1
Fuel Normalization Descriptions
Combustion heating minimum NAECAI
Credits - select ONE
heating option
0.0 ❑
User Notes
2
Heat pump`
Electric resistance heat only - furnace or zonal
1.0 ---.
1.0
❑
❑
4
DHP with zonal electric resistance per option 3A
0.5
❑
_
5
All other heating systems
-1.0
❑
Energy
Options
_
Energy Credit Option Descriptions
Credits -select ONE
energy option from each
Cate orya
j 1.1
Efficient Building Envelope
0.5
❑
1.2
Efficient Building_ Envelope
1.0
❑
1.3
1.4
Efficient Building Envelope
Efficient Building Envelope
0.5
1.0
❑
❑
1.5
Efficient Building Envelope
2.0
❑
1.6
Efficient Building Envelope
3.0
❑
1.7
Efficient Building Envelope
0.5
Ll
2.1
Air Leakage Control and Efficient Ventilation
0.5
❑
2.2
Air Leakage Control and Efficient Ventilation
1.0
El2.3
Air Leakage Control and Efficient Ventilation
1.5
❑
2.4
Air Leakage Control and Efficient Ventilation
2.0
❑
High Efficiency HVAC
1.0
_ 3.2
High Efficiency HVAC
1.0
❑
3.3a
_
High Efficiency HVAC
1.5
❑
_4_, 3.4
High Efficiency HVAC
1.5
❑
3.5
High Efficiency HVAC
1.5
__
El
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
❑
Prescriptive Path -Single Family 2018 Washington State Energy Code -R
2018 Washington State Energy Code — Residential
Summary of Table R406.2 (cont.)
Energy
Options
Energy Credit Option Descriptions (cont.)
Credits - select ONE
energy option from
each categor d
User Notes
5.11
Efficient Water Heating
0.5
❑
5.2
Water Heating
0.5
❑
_
53
_Efficient
Efficient Water Heating
1.0
❑
5.4
Efficient Water Heating
1.5
❑
5.5
Efficient Water Heating
2.0
❑
5.6
Water Heating
2.5
❑
6. le
,Efficient
Renewable Electric Energy credits max)
1.0
j 7.1
1(3
Appliance Package
0.5
❑
_
Total Credits
3.O
_
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.
Pleese print only pages 1. through3 of this worksheet forsUbmission.to your building official.
Presaiplive Palh —Single Fatuity 2018 Washington State Energy Code -R
healing system sizing calculator Is based on the Prescriptive Requirentenls of the 2018 Washington
State Energy Code (WSEC)
and ACCA
gals J and S. This tool will calculate heating
loads only. ACCA procedures For sizing cooling syslents
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
vrill be calculated for you. If you
do not see the selection you need In the drop-dovrn
options,
please contact the WSU Energy Program at
code@energy.vrsu.edu or (360)
956-2042 for assistance.
(1T) 50
spanaway
To see detailed instructions Tor each section, place your cursor on the word "Instructions"
Design Temperature
Envelope Heat Load 8,885
8(u /Hour
FI ore t. Sumo/UAx eT
msunafons
--
Design Temperature
Difference
(1T) 50
spanaway
Blu /Hour
°""""'� Airleakage +envelope heat loss
,� ���
�- „�.N.. BuIlding and Duct Heaf Load 15,093
Btu/Hour
Ducts In unconditioned space: sum o/building heat loss x
JT = rrMoor(r0
degrees) -Outdoor Desyn Temp
Area of Building
Maximum Heat Equipment Output 18,866
Btu /Hour
Building and duct heat loss x 1.401or torted air furnace
Conditlortod Floor Area
msuocr°"s Conditioned Floor Area (sq ft)
1.-03T:
Average Ceiling Height
Conditioned Volume
mso-�cu°ns Average Ceiling Height ((t)
..... 8.0
11,496
Glazing and Door'sy
U -Factor
—
X Area —
UA
msuucuons ( -
`� u-aaa
0.280
182
�
50.96
Skylights
U -Factor
X Area —
UA
mstrucu°ns
0.50
0
---
Insulation
Attic
U -Factor
X Area =
UA
ipso, coons '���Ra9
�v�.
B.U26
792
20.59
Single Raker or Joist Vaulted Callings
U -Factor
X Area
UA
inso-ocuons � SIttt R -varve �
No selection
�
---
Above Grade Walis fees Fie r/
WFactor
X Area
UA
msuummns
0.056
� 1.542
86.35
R -n mrermmwre
Floors
U -Factor
X Area
UA
R-38
0.025
19.80
.79z
Below Grade Walls � ee Fra .e r) _
U -Factor
X Area
UA
msuncuons Select R-vawe
�. '
No selection
�
__
Slab Below Grade rsea Flsp a r!
_
F -Factor
X Le�
UA
mso-,mu°ns selxt conemml� �..._
�..
No selection
---
Slab on Grade f Fmere. �) _
F -Factor
X Len th
UA
msuuouons '��smx�R-varve
y
No selection
---
Location of Ducts
Iretrnalons -- — -=
`y'
_-
Duct Leakage Coefficient
trnamo d s�ce
1.00
Sum of UA 177.70
Envelope Heat Load 8,885
8(u /Hour
FI ore t. Sumo/UAx eT
AIr Leakage Heat Load 6,208
Btu /Hour
Volumex O.6x eTx O.o18
anosec.aae Building Design Heaf Load 15,093
Blu /Hour
°""""'� Airleakage +envelope heat loss
,� ���
�- „�.N.. BuIlding and Duct Heaf Load 15,093
Btu/Hour
Ducts In unconditioned space: sum o/building heat loss x
1.10
Ducts in conditioned space: sum olbuilding heat lossx 1
Maximum Heat Equipment Output 18,866
Btu /Hour
Building and duct heat loss x 1.401or torted air furnace
Buildino and duct heat loss x 1.25 for heat Dump
(oJ/of/I3)
Window, Skylight and Door Schedule
Project Information
1437
Ref. U -factor
Exempt Swinging Door (24 sq. ft. max.)
Exempt Glazed Fenestration (15 sq, it, max.)
Vertical Fenestration (Windows and doors)
Component
Contact Infomation
Width Height
Area UA
20.0 4.00
0.0 0.00
Area UA
5.0
1.40
24.0
6.72
24.0
6.72
9.0
2.52
8.0
2.24
16.0
4.48
20.0
5.60
4.0
1.12
16.0
4.48
16.0
4.48
20.0
4.00
0.0
0.00
0.0
0.00
0.0
0.00
Ref. U -factor
Exempt Swinging Door (24 sq. ft. max.)
Exempt Glazed Fenestration (15 sq, it, max.)
Vertical Fenestration (Windows and doors)
Component
Contact Infomation
Width Height
Area UA
20.0 4.00
0.0 0.00
Area UA
5.0
1.40
24.0
6.72
24.0
6.72
9.0
2.52
8.0
2.24
16.0
4.48
20.0
5.60
4.0
1.12
16.0
4.48
16.0
4.48
20.0
4.00
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
Qt. Feet Inch Feet Inch
Sum o/Overhead Glazing Area and UA
Overhead Glazing Area Weighted U = UA/Area
Total Sum Of Fenestration AYea and UA (far 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
162.0 43.76
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
182.0 47.76