REVIEWED BLD2024-0349+Energy_Calculations+3.13.2024_11.05.08_AM+41265452018 Washington State Energy Code — Residential
Prescriptive Energy Code Compliance for All Climate Zones in Washington
Single Family - New & Additions (effective February 1, 2021) version 1.0
These requirements apply to all IRC building types, including detached one- and two-family
dwellings and multiple single-family dwellings (townhouses).
l Pro ect information i contact Jnformation
Landsverk Qu—ality Homes Inc.
425-742-2742 i
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.
i s
Authorized Representative. Joseph Rowett Dgi`20s bf ,o@°,o;oo '_PhabWe°""Y"°m` "` Date
AM Climate Zones (Table R402-1_1
R-Value a
; U-Factor a
Fenestration U-Factor b
n/a
0.30 I
Skylig-ht U-Factor b
n/a
0.50
Glazed Fenestration SHGC be
n/a
n/a
Ceiling e
I 49
0.026
(Wood Frame Wall gh
j 21 int
0.056
Floor
30
j 0.029
Below Grade Wall `h
10/15/21 int+TB
0.042
Slab d•f R-Value & Depth
j 10, 2 ft
n/a
jR-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 iThe fenestration U-factor column excludes skylights. j
i 1"10/15/21 +STB" means R-10 continuous insulation on the exterior of the wall, or R-15 continuous insulation on
!I !the interior of the wall, or R-21 cavity insulation plus a thermal break between the slab and the basement wall at
c Ithe interior of the basement wall. "10/15/21 +5TB" shall be permitted to be met with R-13 cavity insulation on I
the interior of the basement wall plus R-5 continuous insulation on the interior or exterior of the wall. "5TB"
I ;means R-5 thermal break between floor slab and basement wall. I
d j 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
lextends 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 islab 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. E
i For log structures developed in compliance with Standard ICC 400, log walls shall meet the requirements for
g # climate zone 5 of ICC 400.
Ilint. (intermediate framing) denotes framing and insulation as described in Section A103.2.2 including standard
h 1frafning 16 inches on center, 78% of the wall cavity insulated and headers insulated with a minimum of R-10 I
!insulation.
Prescriptive Path — Single Family 2018 Washington State Energy Code-R 1
2018 Washington State Energy Code - Residential
Prescriptive Energy Code Compliance for All Climate Zones in Washington
Single Family - New New & Additions (effective February 1.,2021)
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 i
Fuel Normalization Descriptions
O bons'
Credits - select ONE
heating option
i
User Notes { I
I
1 (Combustion heating minimum NAECAb
0.0
❑
2 'Heat pump`
1.0
❑
{
3 (Electric resistance heat only - furnace or zonal
-1.0
❑
DHP with zonal electric resistance per option 3.4
0.5
; ❑
I 5 JAII other heating systems
-1.0
❑
j
Energy
(Options ! Energy Credit Option Descriptions
1--�---
Credits - select ONE
energy option from each-
1
1.1 IEfficient Building Envelope
0.5
❑
1.2 !Efficient Building Envelope
1.0
1 M
I 1.3 !Efficient Building Envelope
0.5
❑
I
1.4 jEfficient Building Envelope
1.0
❑
1 1.5 1Efficient Building Envelope 1 2.0 I ❑
# 1.6 IFfficient Building FnvPlnnP f 3 n I-1
p 1.7 Efficient Building Envelope ❑
0.5
❑
l_ 2.1 Air Leakage Control and Efficient Ventilation �-
0.5
E ❑
1 2.2 'Air Leakage Control and Efficient Ventilation 1.0 ❑
E �
1 2-1 !Air Leakage Cnntrnl and FffiriPnt VPntilatinn 1 5 n 1
2.4 iAir Leakage Control and Efficient Ventilation 9
2.0
❑
3.1- 1High Efficiencv HVAC
I 1.0
❑
3.2 IH
3.3a H
3.4 H
i
3.5 H
3.6- '. i H
HVAC
HVAC
HVAC
HVAC
HVAC
HVAC
1.0 ❑
1.5 ❑
1.5 ❑
1.5 ❑
0.5
4.2 (High Efficiency HVAC Distribution System 1.0
Prescriptive Path - Single Family 2018 Washington State Energy Code-R
❑{
LJ
2
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 (cunt.) i
Ener j
IIEnergy. Credit Option Descriptions (cont)
Options i
Credits - select ONE
energy option from
i each category
i
i User Notes
j
51d { Efficient Water Heating
j 0.5
El
5.2 !Efficient Water Heating
0.5
; ❑
5.3 Efficient Water Heating
`5.4
1.0
❑
Efficient Water Heating
5.5 Efficient Water Heating _
i 1.5
2.0
❑
i
1 5.6 'Efficient Water Heating
2.5
❑
I 6.ie I Renewable Electric Energy (3 credits max)
I
7.1 iAppliance Package
0.5
! ❑
i
Total Credits
j
Clear Form I
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 C4033.2(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 S.G. See Table 406.3.
e. 1.0 credit for each 1,200 kWh of electrical generation pr6vided annually, up to 3 credits max.
See the complete Table R406.2 for all requirements and option descriptions.
f. Use the single radiobutton in the upper right of the second column to deselect radiobuttons in that group.
Please print only pages 1 through 3 of this worksheet for submission to your building official.
Prescriptive Path — Single Family 2018 Washington State Energy Code-R
Window, Skylight and Door Schedule
Project Information
Landsverk Residence
Addition - Remodel
Exempt Swinging Door (24 sq. ft. max.)
Exempt Glazed Fenestration (15 sq. ft. max.)
Vertical Fenestration (Windows and doors)
Component
Description
Ref. U-factor
0.30
Ref. U-factor
Master Bathroom
0.30
Master Bedroom
0.30
Master Bedroom
0.30
Great Room
0.30
Nook
0.30
Nook
0.30
Kitchen
0.30
Laundry Rm
0.30
Bedroom #2
0.30
Stairway
0.30
Bathroom #4
0.30
Bedroom #4
0.30
Office
0.30
Great Room Transoms
0.30
Contact Information
Landsverk Quality Homes, Inc.
24113 56th Ave W
Mountlake Terrace, WA 98043
Width Height
Qt. Feet Inch Feet Inch
1 2 $ 18 °
Width Height
Qt. Feet Inch Feet Inch
MMEME
MMEME
MMEME
MMEME
MMEME
MMEME
MMEME
MMEME
MMEME
MMEME
MMEME
MMEME
MMEME
MMEME
MMEME
MMEME
MMEME
MMEME
MMEME
MMEME
MMEME
MMEME
MMEME
MMEME
MMEME
MMEME
MMEME
MMEME
MMEME
MMEME
MMEME
MMEME
MMEME
MMEME
MMEME
Area UA
1.3
PN0.0
6.40
0.00
Area UA
1
�1
• 1
: •1
®1
•1
®1
•1
1 1
• 11
' 1
11
111
®1
1 1
' 1
1
�1
1
• 1
11
111
11
111
11
111
11
111
11
111
11
111
11
111
11
111
11
111
11
111
11
111
11
111
11
111
11
111
11
111
11
111
11
111
11
111
11
111
11
111
Overhead Glazing (Skylights)
Component
Sum of Vertical Fenestration Area and UA
Vertical Fenestration Area Weighted U = UA/Area
Ket. U-tactor
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)
608.0 182.40
0.30
Area UA
629.3 188.80
Simple Heating System Size: Washington State
This heating system sizing calculator is based on the Prescriptive Requirements of the 2015 Washington State Energy Code (WSEC) and ACCA Manuals
J and S. This calculator will calculate heating loads only. ACCA procedures for sizing cooling systems should be used to determine cooling loads.
The glazing (window) and door portion of this calculator assumes the installed glazing and door products have an area weighted average U-factor of 0.30.
The incorporated insulation requirements are the minimum prescriptive amounts specified by the 2015 WSEC.
Please fill out all of the green drop -downs and boxes that are applicable to your project. As you make selections in the drop -downs for each section, some
values will be calculated for you. If you do not see the selection you need in the drop -down options, please call the WSU Energy Extension Program at
(360) 956-2042 for assistance.
Project Information Contact Information
Landsverk Residence Landsverk Quality Homes, Inc.
Addition -Remodel7V - 24113 56th Ave W E�Em
Mountlake Terrace, WA 98043
Heatinq System Type: O All Other systems 0 Heat Pump
To see detailed instructions for each section, place your cursor on the word 'Instructions".
Design Temperature
Instructions Design Temperature Difference (AT)
Edmonds V AT = Indoor (70 degrees) - Outdoor Design Temp
Area of Building
Conditioned Floor Area
instrucuons Conditioned Floor Area (sq ft)
4,241
Average Ceiling Height
Conditioned Volume
Instructions Average Ceiling Height (ft)
10.0
42,410
Glazing and Doors
U-Factor
X Area =
UA
Instructions
0.30
608
182.40
Skylights
U-Factor
X Area =
UA
Instructions
0.50
Insulation
Attic
U-Factor
X Area =
UA
Instructions I R-49
l =�
0.026
J
3,680
95.68
Single Rafter or Joist Vaulted Ceilings
U-Factor
X Area
UA
Instructions
No Vaulted Ceilings in this project.
�
Above Grade Walls (see Figure 1)
U-Factor
X Area
UA
Instructionski R-21 Intermediate
�
0.056
4,386
245.62
Floors
U-Factor
X Area
UA
Instructions
0.025
1,176
29.40
R-38
�
Below Grade Walls (see Figure 1)
U-Factor
X Area
UA
Instructions
No Below Grade Walls in this project.
�
---
---
Slab Below Grade (see Figure 1)
F-Factor
X Length
UA
Instructions
F
No Slab Below Grade in this project.
�
Slab on Grade (see Figure 1)
F-Factor
X Length
UA
Instructions
0.540
149
80.46
R-10 Perimeter
�
Location of Ducts
Instructions
Duct Leakage Coefficient
No Ducts
1.00
Sum of UA
633.56
Figure 1.
Above Grade
46
Envelope Heat Load
29,144 Btu / Hour
Sum of UA X AT
Air Leakage Heat Load
21,069 Btu / Hour
VolumeX 0.6XATX.018
Building Design Heat Load
50,213 Btu / Hour
Air Leakage + Envelope Heat Loss
Building and Duct Heat Load
50,213 Btu / Hour
Ducts in unconditioned space: Sum of Building Heat Loss X 1.10
Ducts in conditioned space: Sum of Building Heat Loss X 1
Maximum Heat Equipment Output
62,766 Btu / Hour
Building and Duct Heat Loss X 1.40 for Forced Air Furnace
Building and Duct Heat Loss X 1.25 for Heat Pump
(07/01/13)