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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 G Townhome Polygon Northwest Company <br /> Eclipse Jamie Aubrey <br /> Everett,Wa (425)586-7700 <br /> Heating System Type: O 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 /> or,.!,,ii""" ---, I Design Temperature Difference(AT) 47 <br /> Everett 1C v', AT=Indoor(70 degrees)-Outdoor Design Temp <br /> Area of Building <br /> Conditioned Floor Area <br /> "".L,iv. Conditioned Floor Area(sq ft) 1,960 <br /> Average Ceiling Height Conditioned Volume <br /> l".111,ii""'. Average Ceiling Height(ft) 8.5 16,660 <br /> Glazing and Doors U-Factor X Area = UA <br /> ii ""°` 0.30 295 88.44 <br /> Insulation <br /> Attic U-Factor X Area = UA <br /> In4.- ii,J nrii. R.49 77 J 0.026 872 22.66 <br /> l <br /> Single Rafter or Joist Vaulted Ceilings U-Factor Area UA <br /> Instructions ---- i <br /> No Vaulted Ceilings in this project. y j --- <br /> Above Grade Walls(see Figure 1) U-Factor Area UA <br /> Instructions 0.056 1,883 105.45 <br /> R 21 <br /> ` ___ __.. ..._._ . J <br /> Floors U-Factor Area UA <br /> Instructions • <br /> R-so 0.029 570 16.53 <br /> Below Grade Walls(see Figure 1) U-Factor Area UA <br /> Instructions ...._....- - —..__ __--- <br /> No Below Grade Walls in this project. V --- --- <br /> l J <br /> Slab Below Grade(see Figure 1) F-Factor Length UA <br /> Instructions No Slab Below Grade in this project. V� i LL�III <br /> Slab on Grade(see Figure 1) F-Factor Length UA <br /> Instructions I 0.540 88 47.52 <br /> R-10 Perimeter v 1 <br /> i <br /> Location of Ducts <br /> Instructions Duct Leakage Coefficient <br /> L Conditioned Space V <br /> J 1.00 <br /> Sum of UA 280.60 <br /> Envelope Heat Load 13,188 Btu/Hour <br /> Figure 1. Sum of UAXST <br /> Air Leakage Heat Load 8,457 Btu/Hour <br /> .....a VolumeX 0.6X AT X.018 <br /> Above Grade Building Design Heat Load 21,645 Btu/Hour <br /> -- Air Leakage+Envelope Heat Loss <br /> Building and Duct Heat Load 21,645 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 30,303 Btu/Hour <br /> Building and Duct Heat Loss X 1.40 for Forced Air Fumace <br /> Building and Duct Heat Loss X 1.25 for Heat Pump <br /> • <br /> /- (07/01/13) <br />