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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 F 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 /> Instructions - - ._ -_---------_ -- - <br /> ( -v------------ ------------ Design Temperature Difference(AT) 47 <br /> (: Eerett_1C <br /> _ _ ,„.y 4T=Indoor(70 degrees)-Outdoor Design Temp <br /> Area of Building <br /> Conditioned Floor Area <br /> Instructions Conditioned Floor Area(sq ft) 1,381 <br /> Average Ceiling Height Conditioned Volume <br /> Instructions Average Ceiling Height(ft) 8.5 11,739 <br /> Glazing and Doors U-Factor X Area = UA <br /> Instructions 0.30 149 44.58 <br /> Insulation <br /> Attic U-Factor X Area = UA <br /> Instructions ( {R-49 -- `— J l 0.026 674 17.52 <br /> Single Rafter or Joist Vaulted Ceilings U-Factor Area UA <br /> Instructions j l <br /> (l No Vaulted Ceilings in this project I --- <br /> Above Grade Walls(see Figure 1) U-Factor Area UA <br /> Instructions <br /> R-21 . :1 0.056 662 37.07 <br /> Floors U-Factor Area UA <br /> Instructions0.029 564 16.36 <br /> R-30 <br /> Below Grade Walls(see Figure 1) U-Factor Area UA <br /> Instructions ---- _ "- -- <br /> I No Below Grade Walls in this project. V j --- --- <br /> Slab Below Grade(see Figure 1) F-Factor Length UA <br /> Instructions <br /> ` _..._� l <br /> No Slab Below Grade in this project --- <br /> Slab on Grade(seeFigure 1) J F-Factor Len.th UA <br /> Instructions .. ..... '-,..- -...... ...-1 <br /> 1 1R-10 Perimeter I 0.540 37 19.98 <br /> Location of Ducts <br /> J <br /> Instructions . I Duct Leakage Coefficient <br /> Conditioned Space dI <br /> l :___ .:�:._. 1.00 <br /> Sum of UA 135.51 <br /> Envelope Heat Load 6,369 Btu/Hour <br /> Figure 1. Sum of UAXAT <br /> _„,-..----4,--, Air Leakage Heat Load 5,958 Btu/Hour <br /> -: _ ---, VolumeX 0.6X 4T X.018 <br /> Above Grade Building Design Heat Load 12,328 Btu/Hour <br /> Air Leakage+Envelope Heat Loss <br /> Below Grade-°• <br /> Building and Duct Heat Load 12,328 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 r'' <br /> Maximum Heat Equipment Output 17,259 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 >' I <br /> ?) <br /> (07/01/13) - <br />