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Home My WebLink About2090 OlympiaWSU Code Compliance Calculator Project Information Messages / Comments *RESULT=PASS Century Communities Olympia Note: Review required for custom entries: - Doors- Flat/Vaulted Ceilings Plan 2090 UA Reduction = 39.65, Proposed UA is better than baseline by 16% Contact Information UA reduction meets percent target of selected Option 1.2 Jacob Hooper, RESNET Rater/QAD Window area is 9% of floor area ICS-Inspectors - jacobh@ics-inspectors.com 360.713.1896 Whole House Mechanical Ventilation Airflow Rate: 97.5 CFM with Run Time Percent of 100%, Unbalanced, Not Distributed Maximum allowable total measured duct leakage: 167 CFM25 ANALYSIS SET UP What code compliance pathway are you using? Project Building Type? Occupancy Type? Code Version? Classification:Medium Dwelling Unit -- 2090 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 Proposed Design ** Component Performance, R occupancies U *Area UA Area UA Doors U =0.300 38 11.3 38 6.4 Overhead Glazing U =0.500 0 0.0 0 0.0 Vertical Glazing U =0.300 185 55.5 185 46.3 Flat/Vaulted Ceilings U =0.024 1,306 31.3 1,306 24.2 Wall (above grade) U =0.056 2,101 117.7 2,101 105.4 Floors over Crawlspace U =0.029 1,306 37.9 1,306 31.8 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 253.7 Proposed UA Total 214.1 Required Credits 8.0 Proposed Credits 8.0 from Tables 406.2 and 406.3 UA Percent Reduction 16% UA Reduction 39.6 ** 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 * 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. Ducts/distribution system in conditioned space per R403.3.2 Electric resistance, hydronic, ductless and gas fired systems < 80% AFUE systems not permitted 1.0 0.5 Efficient Building Envelope 3.1 -3.10 1 Option 3.6 3.11 4 High Efficiency HVAC: Smart Thermostat NA High Efficiency HVAC Distribution System 0.250 0.019 0.050 0.024 Proposed Design Total UA Alternative, Whole Building Trade Off Analysis U Baseline Design New Construction R3 Single family dwellings and townhouses WSEC 2021 0.170 Option 4.1 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 System No. 4 1.0 Brief Description of Selected Options*Category Select System Type Energy Credits Fuel Normalization Credits (406.2) Table R406.2 Energy Equalization Credits 3.0Variable Refrigerant Heat Pump or Air-to- Water Heat Pump Table R406.3 Energy Credits Energy Credits (406.3) 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 Option No. 2 Air Leakage Control and Efficient Ventilation 2090 Template.xlsm, Version:5/28/2025 1:26:11 PM 7/24/2025 1 WSU Code Compliance Calculator Renewable Electric Energy kWh Energy Credits *Refer to WSEC 2021 Table R406.3 for complete option descriptions and requirements 0.0 Electric heat pump water heater meeting NEEA Tier 3. 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. 0.0 5.0 7 Appliance Package https://sbcc.wa.gov/state-codes-regulations-guidelines/state-building-code/energy-code 6 2.0 Efficient Water Heating: Drain Heat Recovery Efficient Water Heating Efficient Water Heating: Compact Hot Water Distribution 5.1 5.3-5.8 5.2 Option 5.6 Option 5.2 0.5 0.0 2090 Template.xlsm, Version:5/28/2025 1:26:11 PM 7/24/2025 2 WSU Code Compliance Calculator THERMAL ENVELOPE DETAILS - Proposed Design Conditioned Floor Area, Proposed Design 2,090 sq. ft Classification Medium Dwelling Unit Exterior Doors Plan Component Door ID Description Ref. U Qt. Feet Inch Feet Inch Area UA Entry Solid Core Door Custom 0.17 1 3 6 8 20 3.4 Refer to WSEC R402.1.5 U-factor Reference and Calculations Garage Solid Core Door Custom 0.17 1 2 8 6 8 18 3.0 Refer to WSEC R402.1.5 U-factor Reference and Calculations 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 38 6.4 0 2 Exterior Doors Area Weighted U 0.170 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 16 Plan Component Glazing ID Description U Feet Inch Feet Inch 1 SH U=0.25 (2021 1.2; 2018 1.4)Table 406.2 / 406.3 0.25 1 2 4 8.0 2.00 2 SLDR U=0.25 (2021 1.2; 2018 1.4)Table 406.2 / 406.3 0.25 4 4 4 64.0 16.00 3 SLDR U=0.25 (2021 1.2; 2018 1.4)Table 406.2 / 406.3 0.25 1 6 5 30.0 7.50 4 SGD U=0.25 (2021 1.2; 2018 1.4)Table 406.2 / 406.3 0.25 1 6 6 10 41.0 10.25 5 SH U=0.25 (2021 1.2; 2018 1.4)Table 406.2 / 406.3 0.25 1 2 3 6.0 1.50 6 SLDR U=0.25 (2021 1.2; 2018 1.4)Table 406.2 / 406.3 0.25 1 6 4 24.0 6.00 7 PIC U=0.25 (2021 1.2; 2018 1.4)Table 406.2 / 406.3 0.25 1 3 4 12.0 3.00 8 - - 9 - - 10 - - 11 - - 12 - - 13 - - 14 - - 15 - - 16 - - Sum of Area and UA 185.0 46.3 0 Vertical Glazing Area Weighted U 0.250 Vertical Glazing and Doors Area Weighted U 0.236 Flat/Vaulted Ceilings Plan Component Attic ID Description U Ceiling 2x6 24"oc R60 cavity + R23 Eaves Custom 0.019 1,306 24.2 Refer to WSEC R402.1.5 U-factor Reference and Calculations 1,306 24.2 1 Area Weighted U-Value 0.019 Walls (Above Grade) Plan Component Wall ID Description Ref. U UA Width Ref. Ref. Height Notes Height Area Width Qt. Sum of Area and UA Qt. UAArea HeightWidth Sum of Area and UA Ref. Net Area Area UA UA 2090 Template.xlsm, Version:5/28/2025 1:26:11 PM 7/24/2025 3 WSU Code Compliance Calculator Ambient R23 cavity+R0 foam INT 2X6W Lap App A 0.049 1,823 89 Garage R23 cavity+R0 foam INT 2X6W Lap App A 0.049 256 13 STEM Int Concrete Floors, R-5 Ext., 6"wall 10-5B 0.161 22 4 2,101 105 0 Gross Wall Area 2,324 ft2 Area Weighted U-Value 0.050 Sum of Net Area and UA 2090 Template.xlsm, Version:5/28/2025 1:26:11 PM 7/24/2025 4 WSU Code Compliance Calculator Floor (over crawl or exterior) Plan Component Floor UA ID Description Ref. U Main R38 vented Post/Beam (2021 1.2, 1.3; 2018 1.3-1.5)10-3 0.024 835 20 Garage R38 vented Joist (2021 1.2, 1,3; 2018 1.3-1.5)10-3 0.025 455 11 Ambient R38 vented Joist (2021 1.2, 1,3; 2018 1.3-1.5)10-3 0.03 16 0 1,306 32 0 Area Weighted U-Value 0.024 Slab on Grade (less than 2 feet below grade) Plan Component Slab ID Description Ref. F FP 0 0 0 Area Weighted U-Value 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 Weighted U- and F-values 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 Ventilation Requirements Conditioned Floor Area 2,090 sq. ft. Number of Bedrooms 4 Run-Time Percent in Each 4-Hour Segment 100% Is the system Balanced? Is the system Distributed? Ventilation Code Section IRC, Chapter 15 Whole House Mechanical Ventilation Airflow Rate 98 CFM 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 167 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. 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 Design Temperature Difference (∆T)53 F Conditioned Floor Area, Proposed Design 2,090 ft2 Conditioned Volume 18,759 ft3 Average ceiling height =9 ft. Volume = 18759 ft3 0.00 Leave blank to use default of 8.5 ft. ceiling height Average ceiling height 9.0 ft http://www.energy.wsu.edu/Documents/Duct%20Testing%20Standards%20_2018%20WSEC.pdf Conditioned Space https://betterbuiltnw.com/resources/hvac-sizing-tool Link Prescriptive Checklist Affidavit, Existing Affidavit, New Worksheet No Sum of Perimeter and FP Slab Slab Perim Conditioned Space Area Insulation Certificate Sum of Area and UA Not Distributed Unbalanced Compliance Certificate Slab Perim F Olympia, AP. 2090 Template.xlsm, Version:5/28/2025 1:26:11 PM 7/24/2025 5 WSU Code Compliance Calculator HVAC System Type Location of HVAC Distribution System Conditioned Space Sum of UA 214 Envelope Heat Load 11,345 Btu / Hour Sum of UA X ∆T Air Leakage Heat Load 10,738 Btu / Hour ((Volume X 0.6) X ∆T) X .018)) Building Design Heat Load 22,083 Btu / Hour Air Leakage + Envelope Heat Loss Building and Duct Heat Load 22,083 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 27,604 Btu / Hour Building and Duct Heat Loss X 1.25 for heat pumps 8.1 kW Building and Duct Heat Loss X 1.40 for all other systems Heat Pump 2090 Template.xlsm, Version:5/28/2025 1:26:11 PM 7/24/2025 6