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Simple Heating System Size: War uton State <br /> ` This heating system sizing calculator is bases Prescriptive Requirements of the 2012 Washingt ate 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 /> Plan 2506 <br /> • <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 /> instructions <br /> Edmonds Design Temperature Difference(AT) 46 <br /> AT=Indoor(70 degrees)-Outdoor Design Temp <br /> Area of Building <br /> Conditioned Floor Area <br /> Instructions Conditioned Floor Area(sq ft) 2,506 <br /> Average Ceiling Height Conditioned Volume <br /> Instructions Average Ceiling Height(ft) 8.5 21,301 <br /> Glazing and Doors U-Factor X Area = UA <br /> Instructions 0.30377 113.19 <br /> Insulation <br /> Attic U-Factor X Area = UA <br /> Instructions {R-49 0.026 1.,206 31.36 <br /> Single Rafter or Joist Vaulted Ceilings U-Factor Area UA <br /> g project Instructions '.. <br /> No Vaulted Ceilings in this ro'ed Y -- <br /> Above Grade Walls(see Figure 1) U-Factor Area UA <br /> Instructions0.056 2,875 161.00 <br /> Floors U-Factor Area UA <br /> Instructions �_� r.._. <br /> R-30 w`s' 0.029 445,;`,;:1; 12.91 <br /> _ la_. <br /> Below Grade Walls(see Figure l) U-Factor Area UA <br /> InstructionsR21""In`tenor"'-" `"'+� 0.042 714 29.99 <br /> rr; <br /> Slab Below Grade(see Figure 9) F-Factor Length UA <br /> Instructions !a e "'- 0.570 112. 63.84 <br /> R-5 Thermal Break at slab edge <br /> Slab on Grade(see Figure 1) F-Factor Length UA <br /> Instructions et "` 0.540 112 60.48 <br /> R-10 Perimeter <br /> Location of Ducts <br /> Instructionsw". f Duct Leakage Coefficient <br /> unconditioned Space _Ji <br /> - --auss 1.10 <br /> Sum of UA 472.76 <br /> Envelope Heat Load 21,747 Btu/Hour <br /> Figure 1. Sum ofUAXAT <br /> Air Leakage Heat Load 10,582 Btu/Hour <br /> VolumeX 0.6XATX.018 <br /> HMI Building Design Heat Load 32,329 Btu/Hour <br /> Air Leakage+Envelope Heat Loss <br /> Building and Duct Heat Load 35,562 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 49,787 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 /> IZ....— <br />