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Simple Heating System Size: Washit,ywn 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 /> Recreation Room Addition Belinda Looney <br /> 6609 Elliot Way <br /> Everett,WA <br /> Heating System Type: OO All other systems O 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) 49 <br /> Everett Paine AFB <br /> AT=Indoor(70 degrees)-Outdoor Design Temp <br /> Area of Building <br /> Conditioned Floor Area <br /> Instructions Conditioned Floor Area(sq ft) 661 <br /> Average Ceiling Height Conditioned Volume <br /> Instructions Average Ceiling Height(ft) 8.5 5,619 <br /> Glazing and Doors U-Factor X Area = UA <br /> Instructions <br /> 0.30 90 27.00 <br /> Skylights U-Factor X Area = UA <br /> Instructions 0.50 0� <br /> Insulation <br /> Attic U-Factor X Area = UA <br /> . . , <br /> Instructions <br /> R-49 0.026 661 17.19 <br /> as <br /> Single Rafter or Joist Vaulted Ceilings U-Factor X Area UA <br /> 0 Instructions No Vaulted Ceilings in this project --- d <br /> Above Grade Walls(see Figure 1) U-Factor X Area UA <br /> Instructions R_zt Intermediate 0.056 885 49.54 <br /> Floors U-Factor X Area UA <br /> Instructions n"' <br /> No Floors above unconditioned spaces --- <br /> Yii�& NJi4�Ww1lw.iY� <br /> Below Grade Walls(see Figure 1) U-Factor X Area UA <br /> Instructions s No Below Grade Walls m this project <br /> Slab Below Grade(see Figure 1) F-Factor XLeth UA <br /> Instructions -... <br /> No Slab Below Grade in this project. --- 0 <br /> Slab on Grade(see Figure 1) F-Factor X Len th UA <br /> Instructions 0.540 92 49.86 <br /> R-10 Perimeter <br /> Location of Ducts <br /> Instructions � ...:;....,.. Duct Leakage Coefficient <br /> r Ducts 1.00 <br /> Sum of UA 143.58 <br /> Envelope Heat Load 7,036 Btu/Hour <br /> Figure 1. sum ofuAXAT <br /> Air Leakage Heat Load 2,973 Btu/Hour <br /> Volume X 0.6 X AT X.018 <br /> Above Grade Building Design Heat Load 10,009 Btu/Hour <br /> Air Leakage+Envelope Heat Loss <br /> Building and Duct Heat Load 10,009 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 14,012 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 /> (07101113) 3-� <br />