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Simple Heating System Size:Washington 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: O All Other Systems 0 Heat Pump <br /> To see detailed instructions for each section,place your cursor on the word"Instructions". <br /> Design Temperature <br /> Instructions -- i Design Temperature Difference(AT) 47 <br /> Scores-- AT=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 /> Instructions9 79 -- 0.026 r 926 24.08 <br /> Single Rafter or Joist Vaulted Ceilings U-Factor X Area UA <br /> Instructions P.38 vented ♦ " 0.027 ! 216 5.83 <br /> Above Grade Walls(see Figure v U-Factor X Area UA <br /> Instructions 9.2 Intermediate s 0,056 1.967 110.17 <br /> Floors U-Factor X Area UA <br /> instructions 0.025 1,142 28.55 <br /> P-?3 v <br /> Below Grade Walls(see Flews.n U-Factor X Area UA <br /> Instructions <br /> �,�•.tt;-,a No selection <br /> I <br /> Slab Below Grade(see Fioure 1) F-Factor X Len UA <br /> Instructions <br /> SeleR canditioninq No selection --- <br /> Slab on Grade(seer-inure/1 F-Factor X Let nth UA <br /> Instructions Select R-value . No selection <br /> Location of Ducts <br /> Instructions Duct Leakage Coefficient <br /> L,n "(l;',_I ell Spar.- <br /> _ <br /> V <br /> 1.10 <br /> Sum of UA 253.14 <br /> Envelope Heat Load 11,898 Btu/Hour <br /> Figure 1. Sum of UA X AT <br /> Air Leakage Heat Load 11,703 Btu/Hour <br /> VciumeX 06XATX 019 <br /> Above Goode Building Design Heat Load 23,601 Btu/Hour <br /> Air Leakage+Envelope Heat Loss <br /> Building and Duct Heat Load 25,961 Btu/Hour <br /> Ducts in unconditioned space:Sum of Building Heal Loss X 1.10 <br /> Ducts in conditioned space:Sum of Building Heat Loss X <br /> Maximum Heat Equipment Output 36,345 Btu. ur <br /> Building and Duct Heat LossX 1 40 for Forced Air Furnace <br /> Building and Duct Heat Loss X 1.25 for Heal Pump <br /> (07/01/13) <br />