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Simple Heating System Size:Washington State This heating system sizing calculator is based on the Prescriptive Requirements of the 2012 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. The glazing(window)and door portion of this calculator assumes the installed glazing and door products have an area weighted average U-factor of 0.30. The incorporated insulation requirements are the minimum prescriptive amounts specified by the 2012 WSEC. 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. Project Information Contact Information Unit E3 Townhome Polygon Northwest Eclipse Jamie Aubrey Everett,Washington (425)586-7700 Heating System Type: O Forced Air Furnace 0 Heat Pump To see detailed instructions for each section,place your cursor on the word"Instructions". Design Temperature instructions .- - Design Temperature Difference(AT) 47 Everett 1C _ AT=Indoor(70 degrees)-Outdoor Design Temp Area of Building Conditioned Floor Area Instructions Conditioned Floor Area(sq ft) 1,560 Average Ceiling Height Conditioned Volume Instructions Average Ceiling Height(ft) 8.5 13,260 Glazing and Doors U-Factor X Area = UA Instructions 0.30 I 241 I 72.27 Insulation Attic U-Factor X Area = UA instructions I R I90.026 688 17.89 Single Rafter or Joist Vaulted Ceilings U-Factor Area UA Instructions .. _.. _ -- No Vaulted Ceilings in this project. V J Above Grade Walls(see Figure 1) U-Factor Area UA Instructions R-27 —J �, l 0.056 I 1,801 I 100.86 Floors J U-Factor Area UA Instructions R-3o - I 0.029 430 12.47 � J Below Grade Walls(see Figure 1) U-Factor Area UA Instructions I __No Below Grade Walls m this project. l Slab Below Grade(see Figure 1) F-Factor Length UA Instructions j I No Slab Below Grade in this project --- ._. .. Slab on Grade(see Figure 1) J F-Factor Length UA Instructions R-to Perimeter 0.540 75 40.50 , . ) Location of Ducts Instructions ( --- Duct Leakage Coefficient _ - _ _ 1 [Conditioned Space - i J 1.00 Sum of UA 243.98 Envelope Heat Load 11,467 Btu/Hour Figure 1. Sum ofUAXAT Air Leakage Heat Load 6,731 Btu/Hour �.- VolumeX 0.6XATX.018 Above Grade Building Design Heat Load 18,198 Btu/Hour n-- Air Leakage+Envektpe Heat Loss Building and Duct Heat Load 18,198 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 25,477 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 (07/01/ 79