Laserfiche WebLink
Simple Heating System Size: Washington State <br /> This heating system sizing calculator is based on the Prescriptive Requirements of the 2012 Washington State Enemy 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 /> Unit G Townhome Polygon Northwest Company <br /> Eclipse Jamie Aubrey <br /> Everett,Wa 1425)586-7700 <br /> Heating System Type: ®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 - I Design Temperature Difference(AT) 47 <br /> Everett 1C AT=Indoor(70 degrees)-Outdoor Design Temp <br /> Area of Building <br /> Conditioned Floor Area <br /> Conditioned Floor Area(sq ft) 1,960 <br /> Average Ceiling Height Conditioned Volume <br /> Average Ceiling Height(ft) 8.5 16,660 <br /> Glazing and Doors U-Factor X Area = UA <br /> hca n:ctiu"' 0.30 295 88.44 <br /> Insulation <br /> Attic U-Factor X Area = UA <br /> Instructions R 49 0.026 872 22.66 <br /> Single Rafter or Joist Vaulted Ceilings J U-Factor Area UA <br /> bistrimGon; I I No Vaulted Ceilings in thisproject. : <br /> 9 <br /> Above Grade Walls(see Figure 1) U-Factor Area UA <br /> Instructions ..... ......_._.... ......... ,....... <br /> R-21 0.056 1,883 105.45 <br /> Floors U-Factor Area UA <br /> Instructions 0.029 570 16.53 <br /> L11-30 <br /> Below Grade Walls(see Figure 1) U-Factor Area UA <br /> Instruction:: <br /> No Below Grade Walls in this project. --- "' <br /> Slab Below Grade(see Figure 1) F-Factor Le <br /> UA <br /> Instrurlion,-. <br /> No Slab Below Grade in this project. V --- <br /> Slab on Grade(see Figure 1) F-Factor Len.th UA <br /> nslrucliuns <br /> R-10 Perimeter v I 0.540 88 47.52 <br /> • <br /> Location of Ducts <br /> Instruction" Duct Leakage Coefficient <br /> Conditioned Space V I <br /> 1.00 <br /> Sum of UA 280.60 <br /> Envelope Heat Load 13,188 Btu/Hour <br /> Figure 1. Sum of UAXAT <br /> Air Leakage Heat Load 8,457 Btu/Hour <br /> VolumeX 0.exsrx.0la <br /> Above Grade Building Design Heat Load 21,645 Btu/Hour <br /> Air Leakage+Envelope Heat Loss <br /> Building and Duct Heat Load 21,645 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 30,303 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 />