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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 El Townhome Polygon Northwest <br /> Eclipse Jamie Aubrey <br /> Everett,Washington i425)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 /> Instructions _.._ .....__ .__. Design Temperature Difference(AT) 47 <br /> Everett 1C <br /> __ — AT=Indoor(70 degrees)-Outdoor Design Temp <br /> Area of Building <br /> Conditioned Floor Area <br /> Instructions Conditioned Floor Area(sq ft) 1,344 <br /> Average Ceiling Height Conditioned Volume <br /> instructions Average Ceiling Height(ft) 8.5 11,424 <br /> Glazing and Doors U-Factor X Area = UA <br /> Instructions 0.30 183 54.78 <br /> Insulation <br /> Attic U-Factor X Area = UA <br /> Instructions --- `— --`— <br /> [ R-49 w 1 j 0.026 591 15.37 <br /> Single Rafter or Joist Vaulted Ceilings U-Factor Area UA <br /> instructions No Vaulted Ceilings in thisroject _ w <br /> P 1 --- <br /> Above Grade Walls(see Figure 1) U-Factor Area UA <br /> Instructions 0.056 413 23.13 <br /> R-21 .' <br /> Floors U-Factor Area UA <br /> Instructions <br /> R-30 . j <br /> 0.029 345 10.01 <br /> Below Grade Walls(see Figure 1) U-Factor Area UA <br /> Instructions <br /> No Below Grade Walls in this project --- --- <br /> �n <br /> Slab Below Grade(see Figure 1) F-Factor Length UA <br /> Instructions -.. ____- -- I <br /> No Slab Below Grade in this project. 1! i --- <br /> Slab on Grade(see Figure 1) F-Factor Length UA <br /> Instructions — 0.540 34 18.36 <br /> R10 Perimeter-._-.,. �� <br /> Location of Ducts y��t <br /> Instructions _. .._ - <br /> ---- -----�-- ------ ------ -- Duct Leakage Coefficient <br /> Conditioned Space w <br /> . -.,. , - —.: 1.00 <br /> Sum of UA 121.64 <br /> Envelope Heat Load 5,717 Btu/Hour <br /> Figure 1. Sum of UAXAT <br /> Air Leakage Heat Load 5,799 Btu/Hour <br /> ..0011111111111b..-. VolumeX 0.6X5T X.018 <br /> � <br /> Building Design Heat Load 11,516 Btu/Hour <br /> Air Leakage+Envelope Heat Loss <br /> '' ' Building and Duct Heat Load 11,516 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 16,122 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 /> jjk <br /> (07/01/13) <br />