HomeMy WebLinkAboutCA_2021 WSEC_Worksheet_240709_v1John Gabriel Spruell CGP 253-312-5523 gabe@pacifichomesource.com
Pacific Home Source LLC 4001 72nd Street East Tacoma, WA 98443
2021 WSEC WORKSHEET – CLIMATE ZONE 4, 5&6
DATE: 7-9-24
PROJECT#: PHS24.009
PLAN: Bull ADU
SITE ADDRESS:
5424 NE 10th St
Renton, WA 98059
WSU Code Compliance Calculator, WSEC 2018
Project Information Messages / Results *
Tristan Bull, Bull Accessory Dwellihng Unit
5424 NE 10th St
Renton, WA 98059 UA Reduction = 14.46, Proposed UA is better than baseline by 9%
Contact Information
Pacific Home Source
Gabe Spruell -
253-312-5523 Whole House Mechanical Ventilation Airflow Rate: 30 CFM with Run Time Percent of 100%, Balanced, Distributed
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/OTS-5010.1_post.pdf
Classification:Small Dwelling Unit -- 968 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 0 0.0 0 0.0
Overhead Glazing U =0.500 0 0.0 0 0.0
Vertical Glazing U =0.300 171 51.2 171 42.6
Flat/Vaulted Ceilings U =0.024 968 23.2 968 23.2
Wall (above grade) U =0.056 1,056 59.1 1,056 57.0
Floors over Crawlspace U =0.029 956 27.7 956 23.9
Slab on Grade F =0.540 0 0.0 0 0.0
Below Grade Wall U =N/A 0 0 0.0
Below Grade Slab F =N/A 0 0 0.0
* Values from Table R402.1.2 (Oct 2023)
Baseline UA Total 161.2 Proposed UA Total 146.8
Required Credits 5.0 Proposed Credits 5.0 from Tables 406.2 and 406.3
UA Percent Reduction 9.0%
UA Reduction 14.5
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.
Total Credits
(406.2 & 406.3)
5.0
0.250
0.024
0.054
0.025
Proposed Design
Table R406.3 UA Trade Off
U
Baseline
New Construction
R3 Single family homes and duplexes
WSEC 2021
1.0
Brief Description of Selected Options*Category
Select System TypeSystem No.
5
Fuel Normalization
Credits (406.2)
1
Option 3.5
3.0
Full Description
For heating system based on electric resistance with (1) inverter driven ductless mini-
split heat pump system installed in the largest zone in the dwelling OR (2) With 2kW
or less total installed heating capacity per dwelling
High Efficiency HVAC
Energy Credits
3.11 Option 3.11High Efficiency HVAC: Smart Thermostat 0.5 Connected Energy Star Certified smart thermostat.
Table R406.2 Energy Equalization Credits
2.0
Electric Resistance with Ductless Heat
Pump OR electric resistance with max 2
kW installed capacity
Select Options
Option 1.2
Perscriptive compliance per Table 402.1.3 / U-0.25 vertical
fenestration / R-38 floors or R-10 perimeter & fully insulated
slab. Or 15% reduction in UA per section R402.1.5
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.
Ductless Mini Split Heat Pump W/ Zonal Control. Min HSPF2 of
9 (HSPF of 10) installed in largest zone of the home and
primary heat is Zonal Elec Resist Heat
1.5
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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
Not Selected
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
0.0
3.0
0.0
-
0.0
0.0
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WSU Code Compliance Calculator, WSEC 2018
THERMAL ENVELOPE DETAILS - Proposed Design
Conditioned Floor Area, Proposed Design 968 sq. ft
Classification Small Dwelling Unit
Exterior Doors
Plan Component Door
ID Description Ref.U Qt.Feet Inch Feet Inch Area UA
Exempt U=0.28 - 0.28 1 3 0 6 8 20 5.6
0 0.0
0 0.0
0 0.0
0 0.0
0 0.0
0 0.0
0 0.0
0 0.0
0 0.0
0 0.0
Sum of Area and UA (excluding exempt door)0 0.0 0 0
Exterior Doors Area Weighted U
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 12
Plan Component Glazing
ID Description U Feet Inch Feet Inch
Exempt - - -
1 U=0.25 (2021 1.2; 2018 1.4)Table 406.2 / 406.3 0.25 2 6 0 2 0 24.0 6.00
2 U=0.25 (2021 1.2; 2018 1.4)Table 406.2 / 406.3 0.25 7 3.00 0 5 0 105.0 26.25
3 U=0.25 (2021 1.2; 2018 1.4)Table 406.2 / 406.3 0.25 1 5 0 2 0 10.0 2.50
4 U=0.25 (2021 1.2; 2018 1.4)Table 406.2 / 406.3 0.25 3 3 0 3 6 31.5 7.88
5 - -
6 - -
7 - -
8 - -
9 - -
10 - -
11 - -
12 - -
Sum of Area and UA 170.5 42.6 0
Vertical Glazing Area Weighted U 0.250
Vertical Glazing and Doors Area Weighted U 0.250
Flat/Vaulted Ceilings
Plan Component Attic
ID Description U
R60 blown Attic STD baffled (2021 Code Baseline)10-7 0.024 968 23.2
968 23.2 0
Walls (Above Grade)
Plan Component Wall
ID Description Ref.U UA
UA
Area UARef.
Sum of Area and UA
Net Area
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
R21 cavity+R0 foam INT 2X6W Lap (2018 Code Baseline)10-5 0.054 1,056 57
1,056 57 0Sum 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
R38 vented Joist 16oc (2021 1.2, 1,3; 2018 1.3-1.5)10-3 0.025 956 24
956 24 0
Slab on Grade (less than 2 feet below grade)
Plan Component Slab
ID Description Ref.F FP
No slab on grade NA - 0
0 0 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
Show
Ventilation Requirements
Conditioned Floor Area 968 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 30 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?No
Show
Heating System Sizing - Proposed Design Try Out BetterBuiltNW's HVAC Sizing Tool:
Nearest Weather Station
Indoor Design Temperature 70 F
Outdoor Design Temperature 24 F
Design Temperature Difference (∆T)46 F
Conditioned Floor Area, Proposed Design 968 ft2
Conditioned Volume 7,744 ft3 0.00
Leave blank to use default of 8.5 ft. ceiling height
HVAC System Type
Location of HVAC Distribution System Unducted
All Other Systems (not heat pump)
F
Slab Slab
Perim
Renton
Unducted
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%20_2018%20WSEC.pdf
Unducted
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
Sum of UA, including exempt door and window 152
Envelope Heat Load 7,010 Btu / Hour
Sum of UA X ∆T
Air Leakage Heat Load 3,847 Btu / Hour
((Volume X 0.6) X ∆T) X .018))
Building Design Heat Load 10,857 Btu / Hour
Air Leakage + Envelope Heat Loss
Building and Duct Heat Load 10,857 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 15,199 Btu / Hour
Building and Duct Heat Loss X 1.25 for heat pumps 4.5 kW
Building and Duct Heat Loss X 1.40 for all other systems
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