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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 Forced Air O Heat Pump Contact Information <br /> Piaci:±816 <br /> • <br /> Heating System Type: <br /> To see detailed instructions for each section,place your cursor on the word"Instructions". <br /> Design Temperature <br /> InstructionsDesign Temperature Difference(AT) 46 <br /> Lynnwood .moi <br /> AT=Indoor(70 degrees)-Outdoor Design Temp <br /> Area of Building <br /> Conditioned Floor Area <br /> Instructions Conditioned Floor Area(sq ft) 1,816' <br /> Average Ceiling Height Conditioned Volume <br /> Instructions Average Ceiling Height(ft) 8.5 15,436 <br /> Glazing and Doors U-Factor X Area = UA <br /> Instructions 0.30 2h5: `:; 73.50 <br /> Insulation <br /> Attic U-Factor X Area = UA <br /> Instructions.' <br /> r Rf9 �;;, 0.026 941'_ '.- 24.47 <br /> Single Rafter or Joist Vaulted Ceilings U-Factor Area UA <br /> Instructions t <br /> No Vaulted Ceilings in this project • <br /> Above Grade Walls(see Figure 1) U-Factor Area UA <br /> Instructions 0.056 ;''2,100 117.60 <br /> R-21 IF <br /> Illllllllllll� lll� ... <br /> Floors U-Factor Area UA <br /> Instructions 0.029 20Q% 5.80 <br /> Below Grade Walls(see Figure 1) U-Factor Area UA <br /> Instructions No Below Grade Walls in this project <br /> Slab Below Grade(see Figure 1) F-Factor Length UA <br /> instructions <br /> I.,kNo Slab Below Grade in this project. .`r --- <br /> Slab on Grade(see Figure 1) F-Factor Length UA <br /> instructions _ <br /> 60R-10 Perimeter 0.540 41 22.14 <br /> Location of Ducts <br /> Instructions <br /> Duct Leakage Coefficient <br /> Unconditioned Space "r <br /> 1.10 <br /> Sum of UA 243.51 <br /> Envelope Heat Load 11,201 Btu/Hour <br /> Figure 1. Sum ofUAXAT <br /> Air Leakage Heat Load 7,669 Btu/Hour <br /> VolumeX 0.6XATX.018 <br /> Above Grade Building Design Heat Load 18,870 Btu I Hour <br /> Air Leakage+Envelope Heat Loss <br /> Building and Duct Heat Load 20,757 Btu/Hour <br /> Ducts in unconditioned space:Sum of Building Heat Loss X 1.10 <br /> Duds in conditioned space:Sum of Building Heat Loss X 1 <br /> Maximum Heat Equipment Output 29,060 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) <br />