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Home My WebLink About2448 YelmWSU Code Compliance Calculator, WSEC 2021 Project Information Messages / Results * Century Communities Willow Glenn - (Yelm)Review required for custom entries: - Doors- Flat/Vaulted Ceilings Plan 2448 UA Reduction = 48.62, Proposed UA is better than baseline by 16% Contact Information UA reduction meets percent target of selected Option 1 Jacob Hooper, HERS Rater #4970945 Window area is 11% of floor area ICS Inspectors, LLC - 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: 196 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/OTS-5010.1_post.pdf Classification:Medium Dwelling Unit -- 2448 sq. ft. Baseline Description: Code Baseline - Maximum baseline window area is 15% of floor area per Option 1 UA % reduction calculation (Section R402.1.5). 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 =0.300 263 78.8 263 65.6 Flat/Vaulted Ceilings U =0.024 1,531 36.7 1,531 28.3 Wall (above grade) U =0.056 2,292 128.3 2,292 112.3 Floors over Crawlspace U =0.029 1,531 44.4 1,531 38.3 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 299.6 Proposed UA Total 250.9 Required Credits 8.0 Proposed Credits 8.0 from Tables 406.2 and 406.3 UA Percent Reduction 16.2% UA Reduction 48.6 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) 8.0 0.250 0.019 0.049 0.025 Proposed Design U-Factor Compliance Path / Total UA Alternative U Baseline New Construction R3 Single family homes and duplexes WSEC 2021 0.170 1.0 Brief Description of Selected Options*Category Select System Type 4 System No. 4 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 Option 4.1 Energy Credits 3.11 High Efficiency HVAC: Smart Thermostat 0.0 High Efficiency HVAC Distribution System Table R406.2 Energy Equalization Credits 3.0Variable Refrigerant Heat Pump or Air-to- Water Heat Pump 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. 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 2448 Template UA Trade Off.xlsm 3/28/2025 1 WSU Code Compliance Calculator, WSEC 2021 Renewable Electric Energy kWh Energy Credits *Refer to WSEC 2015 Table R406.2 for complete option descriptions and requirements Option 5.6 Option 5.2 0.5 0.0 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 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 2448 Template UA Trade Off.xlsm 3/28/2025 2 WSU Code Compliance Calculator, WSEC 2021 THERMAL ENVELOPE DETAILS - Proposed Design Conditioned Floor Area, Proposed Design 2,448 sq. ft Classification Medium Dwelling Unit Exterior Doors Plan Component Door ID Description Ref. U Qt. Feet Inch Feet Inch Area UA FRONT 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 14 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 3 2 6 5 37.5 9.38 2 XO U=0.25 (2021 1.2; 2018 1.4)Table 406.2 / 406.3 0.25 2 6.00 4 48.0 12.00 3 XO U=0.25 (2021 1.2; 2018 1.4)Table 406.2 / 406.3 0.25 1 4 3 6 14.0 3.50 4 PIC U=0.25 (2021 1.2; 2018 1.4)Table 406.2 / 406.3 0.25 3 4 4 48.0 12.00 5 PIC U=0.25 (2021 1.2; 2018 1.4)Table 406.2 / 406.3 0.25 2 2 2 8.0 2.00 6 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 7 SH U=0.25 (2021 1.2; 2018 1.4)Table 406.2 / 406.3 0.25 1 2 3 6.0 1.50 8 XO U=0.25 (2021 1.2; 2018 1.4)Table 406.2 / 406.3 0.25 2 6 5 60.0 15.00 9 - - 10 - - 11 - - 12 - - 13 - - 14 - - Sum of Area and UA 262.5 65.6 0 Vertical Glazing Area Weighted U 0.250 Vertical Glazing and Doors Area Weighted U 0.240 Flat/Vaulted Ceilings Plan Component Attic ID Description U 2x6 24"oc R60 cavity + R23 Eaves Custom 0.019 1,531 28.3 Refer to WSEC R402.1.5 U-factor Reference and Calculations 1,531 28.3 1 Walls (Above Grade) Plan Component Wall ID Description Ref. U UA EXT R23 cavity+R0 foam INT 2X6W Lap App A 0.049 1,986 97 GARAGE R23 cavity+R0 foam INT 2X6W Lap App A 0.049 306 15 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 2448 Template UA Trade Off.xlsm 3/28/2025 3 WSU Code Compliance Calculator, WSEC 2021 2,292 112 0Sum of Area and UA 2448 Template UA Trade Off.xlsm 3/28/2025 4 WSU Code Compliance Calculator, WSEC 2021 Floor (over crawl or exterior) Plan Component Floor UA ID Description Ref. U MAIN R38 vented Joist (2021 1.2, 1,3; 2018 1.3-1.5)10-3 0.025 964 24 OVER GARAGER38 vented Joist (2021 1.2, 1,3; 2018 1.3-1.5)10-3 0.03 399 10 CANTILEVERR38 vented Joist (2021 1.2, 1,3; 2018 1.3-1.5)10-3 0.03 168 4 1,531 38 0 Slab on Grade (less than 2 feet below grade) Plan Component Slab ID Description Ref. F FP 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 EER SEER2 COP HSPF2 Converter https://www.adicotengineering.com/eer-seer2-cop-hspf2-kwton-converter Ventilation Requirements Conditioned Floor Area 2,448 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 196 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 2,448 ft2 Conditioned Volume 22,138 ft3 0.00 Leave blank to use default of 8.5 ft. ceiling height HVAC System Type Location of HVAC Distribution System Conditioned Space Heat Pump F Slab Slab Perim Olympia, AP. Conditioned Space Area No Sum of Perimeter and FP Slab Perim Compliance Certificate Insulation Certificate Sum of Area and UA Not Distributed Unbalanced 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 2448 Template UA Trade Off.xlsm 3/28/2025 5 WSU Code Compliance Calculator, WSEC 2021 Sum of UA, including exempt door and window 251 Envelope Heat Load 13,299 Btu / Hour Sum of UA X ∆T Air Leakage Heat Load 12,672 Btu / Hour ((Volume X 0.6) X ∆T) X .018)) Building Design Heat Load 25,971 Btu / Hour Air Leakage + Envelope Heat Loss Building and Duct Heat Load 25,971 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 32,464 Btu / Hour Building and Duct Heat Loss X 1.25 for heat pumps 9.5 kW Building and Duct Heat Loss X 1.40 for all other systems 2448 Template UA Trade Off.xlsm 3/28/2025 6