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• <br /> Simple Heating System Size: Washington State <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 /> Unit E Town home Polygon Northwest Company <br /> Eclipse Jamie Aubrey <br /> Everett,Wa (425)586-7700 <br /> Heating System Type: ®Forced Air Furnace 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 IC <br /> AT=Indoor(70 degrees)-Outdoor Design Temp <br /> Area of Building <br /> Conditioned Floor Area <br /> Conditioned Floor Area(sq ft) 1,163 <br /> Average Ceiling Height Conditioned Volume <br /> Average Ceiling Height(ft) 8.5 9,886 <br /> Glazing and Doors U-Factor X Area = UA <br /> 0.30 127 38.13 <br /> Insulation <br /> Attic U-Factor X Area = UA <br /> Instructions R 49 I 0.026 579 15.05 <br /> L <br /> Single Rafter or Joist Vaulted Ceilings U-Factor Area UA <br /> Instructions _ .." <br /> No Vaulted Ceilings in this project. - <br /> I. ) <br /> Above Grade Walls(see Figure 1) U-Factor Area UA <br /> InCliii.r° '; R 21 . 0.056 590 33.04 <br /> j <br /> Floors U-Factor Area UA <br /> hr-h ir.Pion�- .. I 0.029 533 15.46 <br /> R30 <br /> Below Grade Walls(see Figure 1) U-Factor Area UA <br /> No Below Grade Walls in this piped. --- -- <br /> Slab Below Grade(see Figure 1) F-Factor Len <br /> UA <br /> Ins!niclini•: .._.�._.__ <br /> No Slab Below Grade in this project � --- <br /> Slab on Grade(see Figurer) F-Factor Len.th UA <br /> 1 1iil1 <br /> 0 0.540 22 11.88 <br /> R-10 Perimeter ! <br /> Location of Ducts <br /> 1""'r""'"" Duct Leakage Coefficient <br /> Contlitioned Space <br /> 1.00 <br /> Sum of UA 113.56 <br /> Envelope Heat Load 5,337 Btu/Hour <br /> Figure 1. Sum of UAX AT <br /> f Air Leakage Heat Load 5,018 Btu/Hour <br /> Volume X 0.6 X AT X.018 <br /> Above Grade I Building Design Heat Load 10,355 Btu/Hour <br /> Air Leakage+Envelope Heat Loss <br /> Building and Duct Heat Load 10,355 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 14,497 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 />