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• <br /> m System <br /> ThisSi heating <br /> pleHeating system sizing calculatorSize:is Washington based on the PrescriptStateive Requirements of the 2018 Washington State Energy Code(WSEC)and ACCA <br /> Manuals J and S.This tool will calculate heating loads only.ACCA procedures for sizing cooling systems should be used to determine cooling loads. <br /> Please complete the green drop-downs and boxes that are applicable to your project.As you make selections in the drop-downs for each section,some <br /> values will be calculated for you. If you do not see the selection you need in the drop-down options,please contact the WSU Energy Program at <br /> energycode@energy.wsu.edu or(360)956-2042 for assistance. <br /> Project Information Contact Information <br /> McLean Residence NuttyCAD Drafting&Design,LLC <br /> 1322 Rucker Avenue (206)225-0068 <br /> Everett,Washington 98201 <br /> All Other Systems IV Heat Pump <br /> To see detailed instructions for each section,place your cursor on the word"Instructions" <br /> — Design Temperature Difference(\T) 47 <br /> Everett IC AT=Indoor(70 degrees)-Outdoor Design Temp <br /> Conditioned Floor Area <br /> Conditioned Floor Area(sq ft) 374 <br /> Average Ceiling Height Conditioned Volume <br /> Average Ceiling Height(ft) 9.0 3,366 <br /> U-Factor X Area = UA <br /> j u-0,24 j 0.240 84 20.06 <br /> U-Factor X Area = UA <br /> 0.50 <br /> Attic U-Factor X Area = UA <br /> R_49 0.026 374 9.72 <br /> _------ ----------- <br /> Single Rafter or Joist Vaulted Ceilings U-Factor X Area UA <br /> r_Vd,ur --- No selection <br /> Above Grade Walls(see Figure 1) l U-Factor X Area UA <br /> R--1 Intermediate <br /> _._.__��_._�__--- 0.056 50 2.82 <br /> Floors U-Factor X Area UA <br /> R;, 0.029 374 10.85 <br /> Below Grade Walls(see Figure 1) U-Factor X Area UA <br /> (select R-value . No selection <br /> _—yr <br /> Slab Below Grade(see Figure 1) F-Factor X Length UA <br /> Select conditioning No selection <br /> Slab on Grade(see Figure 1) F-Factor X Length UA <br /> [1[6=-Value V j No selection --- <br /> — Duct Leakage Coefficient <br /> No Ducts N <br /> 1.00 <br /> Sum of UA 43.46 <br /> Envelope Heat Load 2,042 Btu/Hour <br /> Figure 1. Sum of UA x \T <br /> Air Leakage Heat Load 1,709 Btu/Hour <br /> Volume x 0.6 x \T x 0.018 <br /> Above Grade Building Design Heat Load 3,751 Btu/Hour <br /> Air leakage+envelope heat loss <br /> Below Grade <br /> Building and Duct Heat Load 3,751 Btu/Hour <br /> Ducts in unconditioned space:sum of buildino heat loss x 1.10 <br /> Ducts in conditioned space:sum of building heat loss x 1 <br /> Maximum Heat Equipment Output 4,689 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 />