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- Simple Heating System Size: Washloon State <br /> is <br /> This heating system sizing calculator is based on the Prescriptive Requirements of the 2012 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 2012 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 /> Plan 2040 Gary Nash @ Nash&Asso Architects <br /> (425)828-4117 x7489 <br /> gary@Nash-Architects.com <br /> Heating System Type: v 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 /> Design Temperature Difference(AT) 47 <br /> Everett JC V AT=Indoor(70 degrees)-Outdoor Design Temp <br /> Area of Building <br /> Conditioned Floor Area <br /> Conditioned Floor Area(sq ft) 2,040 <br /> Average Ceiling Height Conditioned Volume <br /> Average Ceiling Height(ft) 8.5 17,320 <br /> Glazing and Doors U-Factor X Area = UA <br /> 0.30 292 87.69 <br /> Skylights U-Factor X Area = UA <br /> 0.50 -- <br /> Insulation <br /> Attic U-Factor X Area = UA <br /> R-49 0.026 966 25.12 <br /> Single Rafter or Joist Vaulted Ceilings U-Factor X Area UA <br /> R-38 Vented J 0.027 234 6.32 <br /> Above Grade Walls(see Figure 1) U-Factor X Area UA <br /> R-21 Intermediate 0.056 2,308 129.22 <br /> Floors U-Factor X Area UA <br /> R-30 0.029 1,200 34.80 <br /> Below Grade Walls(see Figure 1) U-Factor X Area UA <br /> Select R-value No selection F 7_1 --- <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 /> - Select R value No selection --- <br /> Location of Ducts <br /> - - --- ) Duct Leakage Coefficient <br /> Unconditioned Space - <br /> 1.10 <br /> Sum of UA 283.15 <br /> Envelope Heat Load 13,308 Btu/Hour <br /> Figure 1 Sumof UAXAT <br /> Air Leakage Heat Load 8,791 Btu/Hour <br /> Volume X 0.6 X AT X.018 <br /> Above Grade Building Design Heat Load 22,099 Btu/Hour <br /> Air Leakage+Envelope Heat Loss <br /> Below Grade Building and Duct Heat Load 24,309 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 i <br /> Maximum Heat Equipment Output 34,033 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 /> (07101113) <br />