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Si fele 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 0 Heat Pump Contact Information <br /> Plan 2435 <br /> Heating System Type: <br /> To see detailed instructions for each section,place your cursor on the word'Instructions" <br /> Design Temperature <br /> Instructions Design Temperature Difference(DT) 46 <br /> Lynnwood L AT=Indoor(70 degrees)-Outdoor Design Temp <br /> Area of Building <br /> Conditioned Floor Area <br /> Instructions Conditioned Floor Area(sq ft) °�r�:' ;2;435' <br /> Average Ceiling Height Conditioned Volume <br /> Instructions Average Ceiling Height(ft) <-8 20,698 <br /> Glazing and Doors U-Factor X Area = UA <br /> Instructions 0.30 131.40 <br /> Insulation <br /> Attic U-Factor X Area = UA <br /> a.}ructinn> r' 0,026 996 25 n <br /> R-49 <br /> Single Rafter or Joist Vaulted Ceilings U-Factor Area UA <br /> Instructions t.. .a Callings <br /> .. _project, <br /> No Vaulted Ceilings in this protect <br /> Above Grade Walls(see Frqure 1) U-Facl:or Area UA <br /> Instructions <br /> R-u 0.056 140.00 <br /> Floors U-Factor Area UA <br /> Instructions r <br /> R-30 r.. 0.02,3 47,0::. 13.63 <br /> Below Grade Walls(see Figure 1) U-Factor Area UA <br /> Instructions .. <br /> No Below Grade Walls in this project " <br /> one <br /> Slab Below Grade(see Fiyure 9 F-Factor Length UA <br /> Instructions slab Below <br /> I h :.,amu <br /> No Slab Below Grade in this project 'r <br /> Slab on Grade(see Figure l) F-Faci:or Length UA <br /> Instructions g 0.540 82. 44.28 <br /> R-10 Perimeter �- <br /> Location of Ducts <br /> .., <br /> Instructions _____ --_�� ���• =• _ Duct Leakage Coefficient <br /> Umm�didoned Space 1.10 <br /> Sum of UA 355.21 <br /> Envelope Heat load 16,339 Btu/Hour <br /> Figure 1. SumofuAXAT <br /> Air Leakage Heat Load 10,283 Btu/Hour <br /> VolumeX 0.6XATX.018 <br /> above ere40 Building Design Heat Load 26,622 Btu/Hour <br /> Air Leakage+Envelope Heat Loss <br /> Building and Duct Heat Load 29,284 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 40,998 Btu/Hour <br /> Building and Duct Heat Loss X 1.40 for Forced Air Furnace <br /> utiding and Duct Heat LossX 1.25 for Heat Pump <br /> / O (07/01/13) <br /> lG/ fes, <br />