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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 (425)586-7700 <br /> Heating System Type: 0 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 Evere x Design Temperature Difference(AT) 47 <br /> eT=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 R-49 0.026 591 15.37 <br /> Single Rafter or Joist Vaulted Ceilings U-Factor Area UA <br /> No Vaulted Ceilings in this project. --- <br /> Above Grade Walls(see Figure 1) U-Factor Area UA <br /> R-21 j 0.056 413 23.13 <br /> Floors J U-Factor Area UA <br /> R_30 0.029 345 10.01 <br /> Below Grade Walls(see Figure 1) U-Factor Area UA <br /> Instruction:: <br /> No Below Grade Walls in this project v J --- --- <br /> Slab Below Grade <br /> (see Figure 1) F-Factor Length UA <br /> Instructions <br /> No Slab Below Grade in this project V I J <br /> Slab on Grade(see Figure 1) F-Factor Length UA <br /> Instructions R-10 Perimeter Y l 0.540 34 18.36 <br /> Location of Ducts <br /> _ 1 Duct Leakage Coefficient <br /> Conditioned Space <br /> 1.00 <br /> Sum of UA 121.64 <br /> Envelope Heat Load 5,717 Btu/Hour <br /> Figure 1. SumofUAXAT <br /> Air Leakage Heat Load 5,799 Btu/Hour <br /> VolumeX 0.6X5TX.018 <br /> Above Grade Building Design Heat Load 11,516 Btu/Hour <br /> Air Leakage+Envelope Heat Loss <br /> tt 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 /> (07/01/13) 7 <br />