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
12-1839 -
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
R -Value a
Date
Fenestration U -Factor °
All Climate Zones (Table R462,1.1)
R -Value a
U -Factor a
Fenestration U -Factor °
n/a
0.30
Skylight U -Factor b
n/a
0.50
Glazed Fenestration SHGC b'`
n/a
n/a
Ceiling e
49J
0.026
Wood Frame Wall a.n
21 int
0.056
Floor
30
0.029
Below Grade Wali `h
10/15/21 int + TB
0.042
Slab dP' R -Value & Depth I
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. "STB"
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
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.
Prescriptive Path -Single Family 2018 Washington State 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 41 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 NAECAI
0.0
❑
2
Heat pump`
1.0
Q
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 Building Envelope
3.0
❑
1.7
Efficient Building Envelope
0.5❑
2.1
Air Leakage Control and Efficient Ventilation
0.5
0
2.2
Air Leakage Control and Efficient Ventilation
1.0
❑
2.3
Air Leakage Control and Efficient Ventilation
1.5
❑
2.4
Air Leakage Control and Efficient Ventilation
2.0
❑
3.1a
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 I
El
3.5
3.5
High Efficiency HVAC
1.5
-
❑
3.6a
High Efficiency HVAC
2.0
❑
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 Stale Energy Code -R
2018 Washington State Energy Code — Residential
Summary of Table R406.2 (cont.)
Energy Credits - select ONE
Energy Credit Option Descriptions (cont.) energy option from User Notes
Options each category d
S.id
Efficient Water Heating
0.5
❑
5.2
Efficient Water Heating
0.5
❑
5.3
Efficient Water Heating
1.0
❑
5.4
Efficient Water Heating
1.5
0-
5.5
5.6
Efficient Water Heating
Efficient Water Heating
2.0
0
2.5
❑
6Ae
Renewable Electric Energy (3 credits max)
1.0
7.1
Appliance Package
0.5
❑
Total Credits
0.0
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.
PJeasc�pf�ntony,pages;1�hroug�,3 of hisovorksheetfor stlbrnission to yourbuilding official:
Prescriptive Path—Singie Family 2018 Washington State Energy Code -R
Size:
ing system sizing calculator (s based on the Prescriptive Requirements of the 2018 Washington
State Energy Code (WSEC)
and ACCA
J and S. This cool v/ill calculate healing
loads only. ACCA procedures For sizing cooling systems
should be used to determine
cooling loads.
complete the green drop -downs
and boxes Thal 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
code@energy.wsu.edu or
(360) 956-2042 for assistance.
DI[ference
(JT)
Heating System Type: Oui aper systems OO Heat Pump
To see detailed instructions /or each section, place your cursor on the word "Instructions"
Design Temperature
Btu /Hour
Sum of UA x dT
Alr Leakage Heat Load 7,597
Btu /Hour
mstrucuons , � _ -
-
`
-- �
Design Temperature
DI[ference
(JT)
Avbum
Btu/ Hour
v
Ducts in conditioned space: sum o/building heat loss x 1
Maximum Heat Equipment Output 24,288
Blu /Hour
_
er= IrMoor(r0degrees) - Outdoor Oesgn temp
Area of Building
Condilloned Floor Area
rnsvuai°ns Condilloned Floor Area
(sq fi)
1,839
Average Celllttg Helgltt
Conditioned Volume
msimcuo"s Average Ceiling Height
(fQ
$&
15,632
Glazing and boors
U -Factor
X Area -
UA
insuum�ons �
-
__
uaza•
�
0.280
276.i
77.00
Skylights
U•Factor
X Area =
UA
instruct ons
0.50
0
---
Insulation
Attic
U -Factor
X Area =
UA
instrucuons r`"a-as
0.026
1,206
31.36
Single Rafter or Joist Vaulted Callings.
U -Factor
X Area
UA
s sett a -varve
No selec8on
�
---
Above Grade Walls (sea Fryure 0
U•Factor
X Area
UA
iostrucu°"s ` a -n mre�n date
0.056
2,223€
124.49
Floors
U -Factor
X Area
UA
rc
msuucuons aas
0.025
'1;205":�
30.13
Below Grade Walls /:ee Frgore rl
U -Factor
X Area
UA
msuucuons 'select a -valve
- �°
No selection
Slab Below Grade t:ee Fiap.e rl _
_
F -Factor
X Length
UA
instmcuons sei�<«�e�nonmq
"`�
No selection
Slab on Grade / Fly re 11
F -Factor
X Length
UA
instrucuons salol a -varve
�
No selection
0
---
Location of Ducts
mstrucuons k _.. _.
-..
Duct leakage Coefflclent
cororoon a Brace
I.00
Sum
of UA
262.97
Fi ure 1.
Above Grade
45
Envelope Heat Load 11,834
Btu /Hour
Sum of UA x dT
Alr Leakage Heat Load 7,597
Btu /Hour
Volumez 0.8x A7x 0.018
Building Design Heat Load 19,431
Btu/Hour
Alileakage +envelope heat loss
Building and Duct Heat Load 19,431
Btu/ Hour
Ducts In unconditioned space: sum oI building heat loss x 1.10
Ducts in conditioned space: sum o/building heat loss x 1
Maximum Heat Equipment Output 24,288
Blu /Hour
Building and duct heat loss x 1.401or torted air furnace
Builtling and duct heat loss x 1.25 forheaf pump
!m/a/r31
Window, Skylight and Door Schedule
Project Information
Exempt Swinging Door (24 sq. ft. max.)
Exempt Glazed Fenestration (15 sq, ft. max.)
Vertical Fenestration (Windows and doors)
Component
Descri tion
Ref. U -factor
Ref. U -factor
Contact Inlormatton
4.00
'RQWDER RM-;
0.0
0 28 '
0.00
-
0.00
L2 1830
EtCTRYk1A�L
�leev7
ev I%%.
64.0
0e
. ....... ........
.. ..v
18.0
5.04
22.5
; .;.
6.30
10.0
2.80
:-:
%
6.72
24.0
6.72
0.0
0.00
16.0
e1
4.48
16.0
el
eve
0.0
DININ,G..,.r.
0.0
0.00
0.0
0.00
BEDRODMA__
0.0
028_,,..
_.v .. ,.�... w,�'
0.0
0.00
0.0
0.00
_.....,....E1v7TRY1'69wE;:
0.0
SJAI�t
0.0
0.00
028
0.0
,
MASTER
0.0
@EDR4OM_,..,,....
028.,:;'.
,.
0.00
0.0
0.00
�'
0.0
0.00
0.0
0.00
6EDROOlGL2
e77
l777Ie 7
0.00
°..,..,.
.
0.0
�'.
0.00
0,
F BEDRO
Exempt Swinging Door (24 sq. ft. max.)
Exempt Glazed Fenestration (15 sq, ft. max.)
Vertical Fenestration (Windows and doors)
Component
Descri tion
Ref. U -factor
Ref. U -factor
Contact Inlormatton
--
4.00
'RQWDER RM-;
0.0
0 28 '
0.00
-
0.00
EtCTRYk1A�L
�leev7
ev I%%.
64.0
0e
. ....... ........
.. ..v
18.0
5.04
22.5
6.30
10.0
2.80
24.0
GREAT ROO(v)
6.72
24.0
6.72
0.0
0.00
16.0
e1
4.48
16.0
el
eve
0.0
DININ,G..,.r.
0.0
0.00
0.0
0.00
BEDRODMA__
0.0
028_,,..
_.v .. ,.�... w,�'
0.0
0.00
0.0
0.00
_.....,....E1v7TRY1'69wE;:
0.0
SJAI�t
0.0
0.00
028
0.0
,
MASTER
0.0
@EDR4OM_,..,,....
028.,:;'.
,.
0.00
0.0
0.00
0.0
0.00
0.0
0.00
6EDROOlGL2
e77
l777Ie 7
--
4.00
'RQWDER RM-;
0.0
0 28 '
0.00
-
0.00
EtCTRYk1A�L
�leev7
ev I%%.
64.0
0e
. ....... ........
.. ..v
18.0
5.04
22.5
6.30
10.0
2.80
24.0
GREAT ROO(v)
6.72
24.0
6.72
0.0
0.00
16.0
e1
4.48
16.0
el
0.0
DININ,G..,.r.
0.0
0.00
0.0
0.00
BEDRODMA__
0.0
028_,,..
_.v .. ,.�... w,�'
0.0
0.00
0.0
0.00
_.....,....E1v7TRY1'69wE;:
0.0
SJAI�t
0.0
0.00
028
0.0
,
MASTER
0.0
@EDR4OM_,..,,....
028.,:;'.
,.
0.00
0.0
0.00
0.0
0.00
0.0
0.00
6EDROOlGL2
e77
l777Ie 7
0.00
°..,..,.
.
0.0
�'.
0.00
0,
F BEDRO
28
,. . _ .,,. ,,.., :� I'
._,.
o.00
0.0
0.00
o.o
o.00
0401
0.00
�, .
I
„�.
ym�.�..,
r:
.
vv
f
W
Nt
1e
vlll
7
lv
leeeve
Width Height
Qt. Feet Inch Feet Inch
Width Height
Area UA
20.0
4.00
0.0
0.00
Area UA
6.0
1.68
6.0
1.68
0.0
0.00
48.0
13.44
64.0
17.92
18.0
5.04
22.5
6.30
10.0
2.80
24.0
6.72
24.0
6.72
0.0
0.00
16.0
4.48
16.0
4.48
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
o.o
o.00
0.0
0.00
o.o
o.00
0401
0.00
Sum of Vertical Fenestration Area and UA
Vertical Fenestration Area Weighted U = UA/Area
Overhead Glazing (Skylights)
Component
Width Height
Feet Inch Feet Inch
Sum of Overhead Glazing Area and UA
Overhead Glazing Area Weighted U = UA/Area
Total Sum of FenestYation AYea and UA (for heating system sizing calculations)
0.0
0.00
0.00
0.0
0.0
0.00
0.00
0.0
0.0
0.00
0.00
0.0
0.0
0.00
0.00
0.0
0.0
0.00
0.00
0.0
0.0
0.00
0.00
0,01
0.00
254.51 71.26
0.28
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
274.5 75.26