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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 /> New Residence Alfred and Kathleen Jubie <br /> 2008 23rd ST 1821 19th DR <br /> Everett,WA Mukilteo,WA 98275 <br /> Heating System Type: CI 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 /> Design Temperature Difference(AT) 47 <br /> Everett JC AT=Indoor(70 degrees)-Outdoor Design Temp <br /> Area of Building <br /> Conditioned Floor Area <br /> Conditioned Floor Area(sq ft) 1,542 <br /> Average Ceiling Height Conditioned Volume <br /> Hons Average Ceiling Height(ft) 8.0 12,336 <br /> Glazing and Doors U-Factor X Area = UA <br /> 0.30 165 49.35 <br /> Skylights U-Factor X Area = UA <br /> 0.50 <br /> Insulation <br /> Attic U-Factor X Area = UA <br /> I.erre, . ,J J 0.026 894 23.23 <br /> Single Rafter or Joist Vaulted Ceilings U-Factor X Area UA <br /> Select 0-Value . j No selection --- <br /> Above Grade Walls(see Figure 1) U-Factor X Area UA <br /> R-21 Intermediate w j 0.056 1,896 106.18 <br /> Floors U-Factor X Area UA <br /> R.30 .j 0.029 657 19.05 <br /> Below Grade Walls(see Figure 1) U-Factor X Area UA <br /> Select R-value .'j No selection -- <br /> Slab Below Grade(see Figure 1) - F-Factor X Length UA <br /> Select condltiornna V 41j No selection --- <br /> Slab on Grade(see Figure 1) F-Factor X Length UA <br /> Select R-Value I No selection --- <br /> Location of Ducts <br /> Duct Leakage Coefficient <br /> ,cnndltioned SpaceONNOMMENNIMINIMIV 1.10 <br /> - <br /> Sum of UA 197.81 <br /> _ Envelope Heat Load 9,297 Btu/Hour <br /> Figure 1. Sum of UAX AT <br /> Air Leakage Heat Load 6,262 Btu/Hour <br /> Volume X O.6 X AT X.018 <br /> Above Grade Building Design Heat Load 15,559 Btu/Hour <br /> -- Air Leakage+Envelope Heat Loss <br /> Building and Duct Heat Load 17,115 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 23,961 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 /> 0(07/01/13) <br />