Energy Code WorksheetWSU Code Compliance Calculator, WSEC 2018
Project Information Messages / Comments *
Plan - 2853B
Review required for custom entries: - Doors
UA Reduction = 26, Proposed UA is better than baseline by 7.3%
Contact Information
Soundbuilt Homes LLC Window area is 11% of floor area
PO Box 73790 -
Puyallup, WA 98373 Whole House Mechanical Ventilation Airflow Rate: 45 CFM with Run Time Percent of 100%, Balanced, Distributed
253-848-0820 Maximum allowable total measured duct leakage: 228 CFM25
ANALYSIS SET UP
What code compliance pathway are you using?
Project Building Type?
Occupancy Type?
Code Version? WSEC-R Rev: Oct. 2023, https://www.sbcc.wa.gov/sites/default/files/2023-12/O
Classification:Medium Dwelling Unit -- 2853 sq. ft.
Baseline Description: Code Baseline - Baseline and proposed window areas are equal.
About Your Selection:Up to 15 sf exempt window and 24 sf exempt door allowable
RESULTS - Comparison of Baseline and Proposed Design **
Component Performance, R occupancies
U *Area UA Area UA
Doors U =0.300 86 25.7 86 19.9
Overhead Glazing U =0.500 0 0.0 0 0.0
Vertical Glazing U =0.300 321 96.2 321 96.2
Flat/Vaulted Ceilings U =0.024 1,322 31.7 1,322 33.1
Wall (above grade) U =0.056 2,392 134.0 2,392 134.0
Floors over Crawlspace U =0.029 2,392 69.4 2,392 47.8
Slab on Grade F =0.540 0 0.0 0 0.0
Below Grade Wall U =N/A 000.0
Below Grade Slab F =N/A 000.0
* Values from Table R402.1.2 (Oct 2023)
Baseline UA Total 356.9 Proposed UA Total 330.9
Required Credits 8.0 Proposed Credits 8.0 from Tables 406.2 and 406.
UA Percent Reduction 7%
UA Reduction 26.0
If the Proposed UA ≤ the Target UA, and the Proposed Credits from Table 406 are ≥ those required in Section R406, then the home meets the WSEC.
** Results assume your inputs are complete and correct. Results do not constitute an approval. Analysis should be reviewed by your AHJ.
Total Credits
(406.2 & 406.3)
8.0
0.300
0.025
0.056
0.020
Proposed Design
U-Factor Compliance Path / Total UA Alternative
U
Baseline
New Construction
R3 Single family dwellings and townhouses
WSEC 2021
0.232
Brief Description of Selected Options*
1.5
Category
Select System TypeSystem No.
4
Option 2.2
Fuel Normalization
Credits (406.2)
1
Option 3.6
5.0
Full Description
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
pump units that are configured to provide both heating and cooling and are rated in
accordance with AHRI 550/590
High Efficiency HVAC
Energy Credits
3.11 High Efficiency HVAC: Smart Thermostat 0.0
Table R406.2 Energy Equalization Credits
3.0Variable Refrigerant Heat Pump or Air-to-
Water Heat Pump
Select Options
Per Section R402.4.1.2 /1.5 ACH50 / For R-2, 0.20 cfm per ft2
at 50 Pa. / HRV with min SHR eff of 0.75 per IRC Section
M1505.3 or IMC Section 403.8
Table R406.3 Energy Credits
Option No.
2 Air Leakage Control and Efficient Ventilation
Efficient Building Envelope
3.1 -3.10
Energy Credits
(406.3)
* Results assume your inputs are complete and correct. Results do not constitute an approval. Analysis should be reviewed by your AHJ.
Air source ducted Heat Pump w/ Min HSPF2 of 10 (HSPF of
11). If htg design temp is 23F or below,a cold climate variable
capacity heat pump is required.
1.0
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WSU Code Compliance Calculator, WSEC 2018
Renewable Electric Energy kWh
Energy Credits
*Refer to WSEC 2015 Table R406.2 for complete option descriptions and requirements
4 Option 4.1
Option 5.6
0.0
0.0
High Efficiency HVAC Distribution System
7 Appliance Package
Efficient Water Heating: Drain Heat Recovery
Efficient Water Heating
Efficient Water Heating: Compact Hot Water Distribution
5.1
5.3-5.8
5.2
6
2.0
5.0
Ducts/distribution system in conditioned space per R403.3.2
Electric resistance, hydronic, ductless and gas fired systems <
80% AFUE systems not permitted
0.0
Electric heat pump water heater meeting NEEA Tier 3.
0.5
0.0
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WSU Code Compliance Calculator, WSEC 2018
THERMAL ENVELOPE DETAILS - Proposed Design
Conditioned Floor Area, Proposed Design 2,853 sq. ft
Classification Medium Dwelling Unit
Exterior Doors
Plan Component Door
ID Description Ref. U Qt. Feet
Inch Feet Inch Area UA
Exempt 00.0
Solid Core Door Custom 0.17 1 2
8 6 8 18 3.0 Refer to WSEC R402.1
Fiberglass Door Custom 0.15 1 3 6
8 20 3.0 Refer to WSEC R402.1
Sliding Door Custom 0.29 1 6 8 48 13.9 Refer to WSEC R402.1
00.0
00.0
00.0
00.0
00.0
00.0
00.0
Sum of Area and UA 86 19.9
0 3
Exterior Doors Area Weighted U 0.232
Overhead Glazing
Plan Component Glazing
ID Description U Feet
Inch Feet Inch
-
-
-
-
-
0.0 0
0 0
Overhead Glazing Area Weighted U
Vertical Glazing Schedule Rows to Show 13
Plan Component Glazing
ID Description U Feet
Inch Feet Inch
Exempt - - -
1 U=0.30 (Code Baseline)Table 406.2 0.30 1 2 5 10.0 3.00
2 U=0.30 (Code Baseline)Table 406.2 0.30 2 5 5 50.0 15.00
3 U=0.30 (Code Baseline)Table 406.2 0.30 1 3 4
6 13.5 4.05
4 U=0.30 (Code Baseline)Table 406.2 0.30 1 8 5 40.0 12.00
5 U=0.30 (Code Baseline)Table 406.2 0.30 2 2
6 5 25.0 7.50
6 U=0.30 (Code Baseline)Table 406.2 0.30 1 4 2 8.0 2.40
7 U=0.30 (Code Baseline)Table 406.2 0.30 1 4 4
6 18.0 5.40
8 U=0.30 (Code Baseline)Table 406.2 0.30 1 6 4
6 27.0 8.10
9 U=0.30 (Code Baseline)Table 406.2 0.30 2 2 3 12.0 3.60
10 U=0.30 (Code Baseline)Table 406.2 0.30 3 4 4 48.0 14.40
11 U=0.30 (Code Baseline)Table 406.2 0.30 2 6 4 48.0 14.40
12 U=0.30 (Code Baseline)Table 406.2 0.30 1 6 2 12.0 3.60
13 U=0.30 (Code Baseline)Table 406.2 0.30 1 6 1
6 9.0 2.70
Sum of Area and UA 320.5 96.2
0
Vertical Glazing Area Weighted U 0.300
Vertical Glazing and Doors Area Weighted U 0.286
Flat/Vaulted Ceilings
Plan Component Attic
ID Description U
R60 blown Attic STD baffled 10-7 0.025 1,322 33.1
1,322 33.1
0
UA
Area UARef.
Sum of Area and UA
Ref.
Ref.
Height
Notes
Height
Area
Width
Qt.
Sum of Area and UA
Qt. UAArea
HeightWidth
Width
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WSU Code Compliance Calculator, WSEC 2018
Walls (Above Grade)
Plan Component Wall
ID Description Ref. U UA
R21 cavity+R0 foam INT 2X6W T111 (Code Baseline)10-5 0.056 2,392 134
2,392 134
0
Net Area
Sum of Area and UA
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WSU Code Compliance Calculator, WSEC 2018
Floor (over crawl or exterior)
Plan Component Floor UA
ID Description Ref. U
R48 vented Joist (2021 1.4; 2018 1.6)0.00 0.020 2,392 48
2,392 48
0
Slab on Grade (less than 2 feet below grade)
Plan Component Slab
ID Description Ref. F FP
00 0
Below Grade Walls and Slabs
Plan Component Slab Wall Wall Wall Slab
ID Description Depth Ref. U Area UA UA
Sum of Area, Length and UA 0 0.0 0 0
0
Links to Download Forms, Checklists and Other Resources
Compliance Certificate Instructions
Insulation Certificate for Residential New Construction
Duct Testing Affadavits
Existing Construction
New Construction
Prescriptive Checklist for 2018 WSEC
Alterations (Remodel) Worksheet
EER SEER2 COP HSPF2 Converter https://www.adicotengineering.com/eer-seer2-cop-hspf2-kwton-converter
Show
Ventilation Requirements
Conditioned Floor Area 2,853 sq. ft.
Number of Bedrooms 1
Run-Time Percent in Each 4-Hour Segment 100%
Is the system Balanced?Verify system meets definition of 'Balanced Whole-House Ventilation'
Is the system Distributed?Verify system meets definition of 'Distributed Whole-House Ventilation'
Ventilation Code Section IRC, Chapter 15
Whole House Mechanical Ventilation Airflow Rate 45 CFM
Show
HVAC Thermal Distribution System Download RS-33 (2018)
Is this a hydronic heating system?
Location of Ducts
Location of Air Handler
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 228 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 - Proposed Design Try Out BetterBuiltNW's HVAC Sizing Tool:
Nearest Weather Station
Indoor Design Temperature 70 F
Outdoor Design Temperature 17 F
F
Slab Slab
Perim
Lacey
Conditioned Space
Show Heating System Sizing?
Area
No
Sum of Perimeter and FP
Slab
Perim
Compliance Certificate
Insulation Certificate
Sum of Area and UA
Distributed
Balanced
Show Distribution System Calculator?
Show Ventilation Calculator?
http://www.energy.wsu.edu/Documents/Duct%20Testing%20Standards%2
Conditioned Space
https://betterbuiltnw.com/resources/hvac-sizing-tool
Link
Prescriptive Checklist
Affidavit, Existing
Affidavit, New
Worksheet
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WSU Code Compliance Calculator, WSEC 2018
Design Temperature Difference (∆T)53 F
Conditioned Floor Area, Proposed Design 2,853 ft2
Conditioned Volume 22,824 ft3 0.00
Leave blank to use default of 8.5 ft. ceiling height
HVAC System Type
Location of HVAC Distribution System Conditioned Space
Sum of UA, including exempt door and window 331
Envelope Heat Load 17,540 Btu / Hour
Sum of UA X ∆T
Air Leakage Heat Load 13,064 Btu / Hour
((Volume X 0.6) X ∆T) X .018))
Building Design Heat Load 30,604 Btu / Hour
Air Leakage + Envelope Heat Loss
Building and Duct Heat Load 30,604 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 38,255 Btu / Hour
Building and Duct Heat Loss X 1.25 for heat pumps 11.2 kW
Building and Duct Heat Loss X 1.40 for all other systems
Heat Pump
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