REVIEWED BLD BLD2024-1042+Energy_Calculations+8.9.2024_11.31.09_AM+4431930RECEIVED
Aug 16 2024 WSU Code Compliance Calculator, WSEC 2021
CITY OFEDMONDS BLD2024-1042
Project Information DEPARTMENT
Select Homes
Plan 3167
Contact Information
Nash Architects
8003 118th Ave NE Kirkland, WA 98033
(425)828-4117
Messages I Results * ••ti
REVIEWED
UA Reduction = 33.81, Proposed UA is better than baseline by 8 % BY
CITY OF EDMONDS
Vertical glazing area exceeds 15% of floor area. BUILDING DEPARTMENT:
Whole House Mechanical Ventilation Airflow Rate: 80 CFM with Run Time Percent of 100%, Balanced, Distributed
Maximum allowable total measured duct leakage: 253 CFM25
' Results assume your inputs are complete and correct. Results do not constitute an approval. Analysis should be reviewed by your AHJ.
PHIAL r 010 JCI Ur
What code compliance pathway are you using?
Total UA Alternative, Whole Building Trade Off Analysis
Project Building Type?
New Construction
Occupancy Type?
R3 Single family homes and duplexes
Code Version?
WSEC 2021
WSEC-R Rev: Oct. 2023, https://www.sbcc.wa.gov/sites/default/files/2023-12/C
Classification:
Medium Dwelling Unit -- 3167 sq. ft.
Baseline Description:
Code Baseline - Maximum baseline window area is 15 % of floor area.
About Your Selection:
No exempt window or door areas
RESULTS - Comparison of Baseline and Pro
Component Performance. R occupancies
Doors U
Overhead Glazing U
Vertical Glazing U
Flat/Vaulted Ceilings U
Wall (above grade) U
Floors over Crawlspace U =
Slab on Grade F
Below Grade Wall U =
Below Grade Slab F =
Baseline
U ' Area UA
0.300
37
11.2
0.500
0
0.0
0.300
475
142.5
0.024
1,950
46.8
0.056
3,250
182.0
0.029
1,950
56.6
0.540
0
0.0
N/A
0
N/A
1 0
" Values trom I able K4Uz.l .Z (Uct ZUZ J)
Baseline UA Total 439.1
Required Credits 8.0
Proposed Design
U Area UA
0.280
37
10.5
0
0.0
0.250
495
123.8
0.024
1,950
46.8
0.054
3,250
175.5
0.025
1,950
48.8
0
0.0
0
0.0
0
0.0
Proposed UATotal 405.3
Proposed Credits 8.0 from Tables 406.2 and 406
UA Percent Reduction 7.7%
UA Reduction 33.8
Table R406.2 Energy Equalization Credits IL -1L
Fuel Normalization
Energy Credits
Total Credits
System No.
Full Description
Select System T e
Credits 406.2
(406.3)
406.2 & 406.3
For heating system using a heat pump that meets federal standards for the
equipment listed in Table C403.3.2(2) or Table C403.3.2(9) OR Air to Water heat
Variable Refrigerant Heat Pump or Air-to-
4
pump units that are configured to provide both heating and cooling and are rated in
Water Heat Pump
3.0
5.0
8.0
accordance with AHRI 550/590
Table R406.3 Energy Credits
Option No.
Category
Select Options
Energy Credits
Brief Description of Selected Options*
1
Efficient Building Envelope
Not Selected
0.0
-
Per Section R402.4.1.2 / 2.0 ACH50 / For R-2, 0.25 cfm per ft2
2
Air Leakage Control and Efficient Ventilation
Option 2.1
1.0
at 50 Pa. / HRV with min SHR eff of 0.65 per IRC Section
M1505.3 or IMC Section 403.8
Air source ducted Heat Pump w/ Min HSPF2 of 10 (HSPF of
3.1 -3.10
High Efficiency HVAC
Option 3.6
1.0
11). If htg design temp is 23F or below,a cold climate variable
capacity heat pump is required.
3.11
High Efficiency HVAC: Smart Thermostat
Not Selected
0.0
X:\Shared\Current\2024 File by Client\Select Homes 2024\98th SP-Edmonds\Lot 1- 3267-GRXWSEC WC72BM21 - Plan 3267.xism 7/10/2024
WSU Code Compliance Calculator, WSEC 2021
4
High Efficiency HVAC Distribution System
Option 4.1
0.5
Ducts/distribution system in conditioned space per R403.3.2
Electric resistance, hydronic, ductless and gas fired systems <
80 % AFUE systems not permitted
5.1
Efficient Water Heating: Drain Heat Recovery
0.0
5.2
Efficient Water Heating: Compact Hot Water Distribution
Option 5.2
0.5
Compact Hot Water Distribution System Max volume between
heat source and fixture is 16 Oz per section R403.5.2, on
demand circ. Pump may be required.
5.3-5.8
Efficient Water Heating
Option 5.6
2.0
Electric heat pump water heater meeting NEEA Tier 3.
6
Renewable Electric Energy
kWh
0.0
7
Appliance Package
Not Selected
0.0
-
Energy Credits
5.0
*Refer to WSEC 2015 Table R406.2 for complete option descriptions and requirements
THERMAL ENVELOPE DETAILS -
Conditioned Floor Area. Pr000sed Desianl 3,167 ISO. ft
Classification Medium Dwelling Unit
Notes
Exterior Doors
Plan
Component
Door
Width
Height
ID
Description
Ref.
U
Qt.
Feet
I"`n
Feet
I"`n
Area
UA
U=0.28
0.28
1
3
°
8
°
24
6.7
U=0.28
0.28
1
2
0
6
8
13
3.7
0
0.0
0
0.0
01
0.0
0
0.0
0
0.0
0
0.0
0
0.0
0
0.0
Sum of Area and UA 37 10.5
Exterior Doors Area Weighted U 0.280
Overhead Glazing
Plan
ID
Component
Description
Ref.
Glazing
U
Qt.
Width
Height
Area
UA
Feet
I coon
Feet""n
Sum of Area and UAI 0.01 0
Overhead Glazing Area Weighted U
Vertical Glazing Schedule Rows to Show
14
Plan
Component
Glazing
Width
Height
Feet
I"On
Feet
io"n
ID
Description
Ref.
U
Qt.
Area
UA
1
U=0.25 (2021 1.2; 2018 1.4)
Table 406.2
0.25
3
3
°
6
°
54.0
13.50
2
U=0.25 (2021 1.2; 2018 1.4)
Table 406.2
0.25
1
5.00
°
5
°
25.0
6.25
3
U=0.25 (2021 1.2; 2018 1.4)
Table 406.2
0.25
1
8
°
2
°
16.0
4.00
4
U=0.25 (2021 1.2; 2018 1.4)
Table 406.2
0.25
3
6
0
6
0
108.0
27.00
5
U=0.25 (2021 1.2; 2018 1.4)
Table 406.21
0.25
1
8
°
8
°
64.0
16.00
6
U=0.25 (2021 1.2; 2018 1.4)
Table 406.2
0.25
1
1 8
01
4
°
32.0
8.00
7
U=0.25 (2021 1.2; 2018 1.4)
Table 406.2
0.25
1
8
°
2
°
16.0
4.00
8
U=0.25 (2021 1.2; 2018 1.4)
Table 406.2
0.25
4
2
°
2
°
16.0
4.00
9
U=0.25 (2021 1.2; 2018 1.4)
Table 406.2
0.25
1
8
°
4
°
32.0
8.00
10
U=0.25 (2021 1.2; 2018 1.4)
Table 406.2
0.25
1
5
°
2
01
10.0
2.50
111
1 U=0.25 (2021 1.2; 2018 1.4)
Table 406.2
0.25
2
5
0
4
0
40.0
1 10.00
1 21
1 U=0.25 (2021 1.2; 2018 1.4)
1 Table 406.21
0.25
1 1
61
°
4
s
27.0
6.75
X:\Shared\Current\2024 File by Client\Select Homes 2024\98th SP-Edmonds\Lot 1- 3267-GRXWSEC WC72BM21 - Plan 3267.xism 7/10/2024
WSU Code Compliance Calculator, WSEC 2021
13 U=0.25 2021 1.2; 2018 1.4 Table 406.2 0.25 2 3 5 30.0 7.50
14 U=0.25 2021 1.2; 2018 1.4 Table 406.2 0.25 1 5 ° 5 ° 25.0
Sum of Area and UA 495.0Ej
Vertical Glazing Area Weighted U Vertical Glazing and Doors Area Weighted U
FlatlVaulted Ceilings
Plan
ID
Component
Descri lion
Ref.
Attic
U
Area
UA
R60 blown Attic STD baffled 2021 Code Baseline
10-7
0.024
1,950
46.8
Sum of Area and UAI 1,9501 46.8
Walls (Above Grade
Plan
ID
Component
Description
Ref.
Wall
U
Net Area
UA
R21 cavity+RO foam INT 2X6W Lap (2018 Code Baselin
10-5
0.054
3,250
176
Sum of Area and UAI 3,2501 176
Floor over crawl or exterior
Plan
ID
Component
Description
Ref.
Floor
U
Area
UA
main
R38 vented Joist 16oc 2021 1.2, 1,3; 2018 1.3-1.5
10-3
0.025
1,950
49
Sum of Area and UAI 1,9501 49
Slab on Grade less than 2 feet belowgrade)
Plan
ID
Component
Description
Ref.
Slab
F
Slab
Perim
FP
No slab on grade
NA
0
Sum of Perimeter and FP1 01 0
Below Grade Walls and Slabs
Plan
ID
Component
Description
Slab
Depth
Ref.
Wall
U
Wall
Area
Wall
UA
Slab
F
Slab
Perim
Slab
UA
Sum of Area, Length and UAI 01 0.01 01 0
Links to Download Forms, Checklists and Other Resources • Link
Compliance Certificate Compliance Certificate Instructions
Insulation Certificate for Residential New Construction Insulation Certificate
Duct Testing Affadavits
Existing Construction Affidavit, Existing
New Construction Affidavit, New
Prescriptive Checklist for 2018 WSEC Prescriptive Checklist
Alterations (Remodel) Worksheet Worksheet
Show Ventilation Calculator? I Show
Ventilation Requirements
X:\Shared\Current\2024 File by Client\Select Homes 2024\98th SP-Edmonds\Lot 1- 3267-GRXWSEC O C720M21 - Plan 3267.xism 7/10/2024
WSU Code Compliance Calculator, WSEC 2021
Conditioned Floor Area
3,167 sq. ft.
Number of Bedrooms
5
Run -Time Percent in Each 4-Hour Segment
100
Is the system Balanced?
Balanced
Verify system meets definition of'Balanced Whole -House Ventilation'
Is the system Distributed?
Distributed
Verify system meets definition of'Distributed Whole -House Ventilation'
Ventilation Code Section
IRC, Chapter 15
Whole House Mechanical Ventilation Airflow Rate
80 CFM
Show Distribution System Calculator? I Show
HVAC Thermal Distribution System Download RS-33 (2018) htt ://www.ener .wsu.edu/Documents/Duct % 2OTestin % 20Standards
Is this a hydronic heating system? lNo
Location of Ducts lConditioned Space
Location of Air Handler lConditioned Space
Is Duct Testing Required? Yes
Maximum Duct Leakage:
Maximum total measured duct leakage per square foot 0.08 CFM25 per sq. ft.
Maximum allowable total measured duct leakage 253 CFM25
A maximum of 10 feet of return ducts and 5 feet of supply ducts are allowed to be located outside of the building thermal envelope, if insulated and sealed per R403.3.7.
Show Heating System Sizing? Show
Heating System Sizing - Proposed Design Try Out BetterBuiltNW's HVAC Sizing Tool: httos://befterbuiltnw.com/resources/hvac-sizing-tool
Nearest Weather Station lEdmonds
Indoor Design Temperature 70 F
Outdoor Design Temperature 24 F
Design Temperature Difference (AT) 46 F
Conditioned Floor Area, Proposed Design
Conditioned Volume
Leave blank to use default of 8.5 ft. ceiling height
HVAC System Type
Location of HVAC Distribution System
Sum of UA
Envelope Heat Load
Sum of UA X AT
Air Leakage Heat Load
((VolumeX 0.6)XAT)X.018))
Building Design Heat Load
Air Leakage + Envelope Heat Loss
3,167 ft2
25,336 ft3
Heat Pump
Conditioned Space
405
18,642 Btu / Hour
12,587 Btu / Hour
31,229 Btu / Hour
Building and Duct Heat Load 31,229 Btu / Hour
For ducts located in unconditioned space: Sum of Building Heat Loss X 1.1
For ducts located in conditioned space or ductless: Sum of Building Heat Loss X 1
Maximum Heat Equipment Output 39,036 Btu / Hour
Building and Duct Heat Loss X 1.25 for heat pumps 11.4 kW
Building and Duct Heat Loss X 1.40 for all other systems
X:\Shared\Current\2024 File by Client\Select Homes 2024\98th SP-Edmonds\Lot 1- 3267-GRXWSEC 0 C720M21 - Plan 3267.xism 7/10/2024