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Simple Heating System Size:Wash -n State <br /> This heating system sizing calculator is based on the Prescriptive Requirements of the 2015 Washington State Energy Code(WSEC)and ACCA <br /> Manuals J and S.This calculator will calculate heating loads only.ACCA procedures for sizing cooling systems should be used to determine cooling <br /> loads. <br /> The glazing(window)and door portion of this calculator assumes the installed glazing and door products have an area weighted average U-factor of <br /> 0.30. The incorporated insulation requirements are the minimum prescriptive amounts specified by the 2015 WSEC. <br /> 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, <br /> 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 <br /> Program at(360)956-2042 for assistance. <br /> Project Information Contact Information <br /> Marie Anderson @ Nash&Asso.Architects <br /> 1744 (425)242-7491 <br /> 8/31/18. marie@Nash-Architects.com <br /> Heating System Type: ©All Other Systems Q Heat Pump <br /> To see detailed instructions for each section,place your cursor on the word"Instructions". <br /> Design Temperature <br /> Instructionsy�"� Design Temperature Difference(AT) 47 <br /> EV2r2tt 1.43AT=Indoor(70 degrees)-Outdoor Design Temp <br /> Area of Building <br /> Conditioned Floor Area <br /> Instructions Conditioned Floor Area(sq ft) 2,735 <br /> Average Ceiling Height Conditioned Volume <br /> Instructions Average Ceiling Height(ft) 8.4 23,056 <br /> Glazing and Doors U-Factor X Area = UA <br /> Instructions <br /> 0.30 282 84.51 <br /> Skylights U-Factor X Area = UA <br /> Instructions 0.50 <br /> Insulation <br /> Attic U-Factor X Area = UA <br /> Instructions R-49 0.026 926 24.08 <br /> Single Rafter or Joist Vaulted Ceilings U-Factor X Area UA <br /> Instructions 11"R-18 vented 0.027 216 5.83 <br /> Above Grade Walls(see Figure l) U-Factor X Area UA <br /> Instructions <br /> R-21 Intermediate 0.056 1,987 110.17 <br /> Floors U-Factor X Area UA <br /> Instructions R38` — "i` 0.025 1,142 28.55 <br /> Below Grade Walls(see Figure 1) U-Factor X Area UA <br /> Instructions - .._____.-_. __--.—_-----____.-- <br /> -�Select R-value No selection -- <br /> Slab Below Grade(see Figure 1) F-Factor X Len th <br /> I UA <br /> Instructions — — No selection <br /> Select conditioning --- <br /> Slab on Grade(see Figure 1) F-Factor X LeLI UA <br /> Instructions SelectV ue No selection -- <br /> Location of Ducts R�a� <br /> Instructions Duct Leakage Coefficient <br /> Unconditioned Space v. I <br /> 1.10 <br /> Sum of UA 253.14 <br /> Envelope Heat Load 11,898 Btu/Hour <br /> Figure 1. Sum of UAXAT <br /> Air Leakage Heat Load 11,703 Btu/Hour <br /> VolumeX O.6XAT X.018 <br /> Above Grade I Building Design Heat Load 23,601 Btu/Hour <br /> A:,T1 Air Leakage+Envelope Heat Loss <br /> Building and Duct Heat Load 25,961 Btu/Hour <br /> Ducts in unconditioned space:Sum of Building Heat Loss X 1.10 <br /> Ducts in conditioned space:Sum of Building Heat Loss X 1 <br /> Maximum Heat Equipment Output 36,345 Btu/Hour <br /> Building and Duct Heat Loss X 1.40 for Forced Air Furnace <br /> Building and Duct Heat Loss X 1.25 for Heat Pump <br /> (07/01/13) <br />