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Home My WebLink About07 Heating_System_Sizing_WorksheetSimple Heating System Size: Washington State Project Information Contact Information Heating System Type: To see detailed instructions for each section, place your cursor on the word "Instructions". Design Temperature Instructions Design Temperature Difference (∆T)47 ∆T = Indoor (70 degrees) - Outdoor Design Temp Area of Building Conditioned Floor Area Instructions Conditioned Floor Area (sq ft)1,107 Average Ceiling Height Conditioned Volume Instructions Average Ceiling Height (ft) 11.0 12,177 Glazing and Doors U-Factor X Area = UA Instructions 0.300 376 112.89 Skylights U-Factor X Area = UA Instructions 0.50 --- Insulation Attic U-Factor X Area = UA Instructions No selection --- Single Rafter or Joist Vaulted Ceilings U-Factor X Area UA Instructions 0.027 1,107 29.89 Above Grade Walls (see Figure 1)U-Factor X Area UA Instructions 0.056 1,157 64.79 Floors U-Factor X Area UA Instructions 0.029 1,107 32.10 Below Grade Walls (see Figure 1)U-Factor X Area UA Instructions No selection --- Slab Below Grade (see Figure 1)F-Factor X Length UA Instructions No selection --- Slab on Grade (see Figure 1)F-Factor X Length UA Instructions No selection --- Location of Ducts Instructions Duct Leakage Coefficient 1.10 Sum of UA 239.67 Envelope Heat Load 11,265 Btu / Hour Sum of UA X ∆T Air Leakage Heat Load 6,181 Btu / Hour Volume X 0.6 X ∆T X .018 Building Design Heat Load 17,446 Btu / Hour Air Leakage + Envelope Heat Loss Building and Duct Heat Load 19,190 Btu / Hour Ducts in unconditioned space: Sum of Building Heat Loss X 1.10 Ducts in conditioned space: Sum of Building Heat Loss X 1 Maximum Heat Equipment Output 23,988 Btu / Hour Building and Duct Heat Loss X 1.40 for Forced Air Furnace Building and Duct Heat Loss X 1.25 for Heat Pump This heating system sizing calculator is based on the Prescriptive Requirements of the 2015 Washington State Energy Code (WSEC) and ACCA Manuals J and S. This calculator will calculate heating loads only. ACCA procedures for sizing cooling systems should be used to determine cooling loads. Please fill out all of the green drop-downs and boxes that are applicable to your project. As you make selections in the drop-downs for each section, some values will be calculated for you. If you do not see the selection you need in the drop-down options, please call the WSU Energy Extension Program at (360) 956-2042 for assistance. DAGNY LORD & SCOTT SCHAEFER PARCEL #: 063000-10-3130 PORT ANGELES, WA 98363 JACOB GOODFELLOW/TIMELESS CONTRACTING 970‐531‐2226 jacobtgoodfellow@gmail.com Above Grade Below Grade Figure 1. All Other Systems Heat Pump (07/01/13)