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Simple Heating System Size: Was=pton State <br /> ITh"is heetinq system sizing calculator is basecFUl I we Prescriptive Requirements of the 2012 Washingt.. - te 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 /> Forced Nr 0 Heat Pump <br /> Plan 2435 <br /> • <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(AT) 46 <br /> Lynnwood I W. AT=Indoor(70 degrees)-Outdoor Design Temp <br /> Area of Building <br /> Conditioned Floor Area <br /> Instructions Conditioned Floor Area(sq ft) _ 2,435 <br /> Average Ceiling Height Conditioned Volume <br /> instructions Average Ceiling Height(ft) 8.5 20,698 <br /> Glazing and Doors U-Factor X Area = UA <br /> Instructions 0.30 438 131.40 <br /> Insulation <br /> Attic U-Factor X Area = UA <br /> instructions 0.026 996 25.90 <br /> Single Rafter or Joist Vaulted Ceilings U-Factor Area UA <br /> • <br /> Instructions <br /> No Vaulted Ceilings in this project <br /> Above Grade Walls(see Figure 1) U-Factor Area UA <br /> Instructions 0.056 2,500 140.00 <br /> R-21 <br /> Floors U-Factor Area UA <br /> Instructions 0.029 470 '.. 13.63 <br /> R-30 i ' <br /> Below Grade Walls(see Figure 1) U-Factor Area UA <br /> instructions -, <br /> No Below Grade Walls In ails project <br /> Slab Below Grade ee.Figure F-Factor Length UA <br /> Instnictions t.,.I_,� <br /> No Slab Below Grade in this project. _''!'. <br /> Slab on Grade(see Figure V F-Factor Length UA <br /> Instructions <br /> R-10 Perimeter �. 0.540 82 4428 <br /> Location of Ducts <br /> Instructionsr,-• ww - - Duct Leakage Coefficient <br /> hol Unconditioned Space s <br /> 1.10 <br /> Sum of UA 355.21 <br /> Envelope Heat Load 16,339 Btu f Hour <br /> Figure 1. Sum ofuAXAT <br /> Air Leakage Heat Load 10,283 Btu I Hour <br /> ..4111111111111166.. VolumeX 0.6XATX.018 <br /> MEN Building Design Heat Load 26,622 Btu I Hour <br /> Air Leakage+Envelope Heat Loss <br /> Building and Duct Heat Load 29,284 Btu I 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 /> Building and Duct Heat Loss X 1.25 for Heat Pump <br /> / Li � ; (07/01/13) <br />