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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 /> Design Temperature Difference(AT) 47 <br /> Everett JC <br /> l AT=Indoor(70 degrees)-Outdoor Design Temp <br /> Area of Building <br /> Conditioned Floor Area <br /> 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 /> 0.30 149 44.58 <br /> Insulation <br /> Attic U-Factor X Area = UA <br /> Instructions 0.026 674 17.52 <br /> R49 <br /> Single Rafter or Joist Vaulted Ceilings U-Factor Area UA <br /> Instructions ..__ <br /> No Vaulted Ceilings in this project. • <br /> --- <br /> Above Grade Walls(see Figure1) U-Factor Area UA <br /> Instructions _..__._._.____....-_ - <br /> - R-zt . 0.056 662 37.07 <br /> Floors U-Factor Area UA <br /> Instructions ,.... <br /> R-30 • ¢ 0.029 564 16.36 <br /> Below Grade Walls(see Figural) U-Factor Area UA <br /> Instructions_- project. <br /> No Below Glade Walls in this --- --- <br /> Slab Below Grade(see Figural) F-Factor Len <br /> UA <br /> Instructions _. ........:........ _...... __.., . <br /> tat'No Slab Below Grade in this project. --- <br /> Slab on Grade(see Figure 1) F-Factor Len.th UA <br /> RtO Perimeter 0.540 37 19.98 <br /> Location of Ducts <br /> Instructions • <br /> i Duct Leakage Coefficient <br /> ,.Conditioned Space 4r.I 1 1.00 <br /> Sum of UA 135.51 <br /> Envelope Heat Load 6,369 Btu/Hour <br /> Figure 1. Sum ofuAXAT <br /> Air Leakage Heat Load 5,958 Btu/Hour <br /> VolumeX 0.6X AT X.018 <br /> Above Grade Building Design Heat Load 12,328 Btu/Hour <br /> Air Leakage+Envelope Heat Loss <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 <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 <br /> s <br /> (07/01/13) <br />