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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 Contact Information <br /> Unit F Townhome Polygon Northwest Company <br /> Eclipse Jamie Aubrey <br /> Everett,Wa (425)586-7700 <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 /> hrraructior'`. Design Temperature Difference(ST) 47 <br /> Everett IC V <br /> AT=Indoor(70 degrees)-Outdoor Design Temp <br /> Area of Building <br /> Conditioned Floor Area <br /> Instructions Conditioned Floor Area(sq ft) 1,381 <br /> Average Ceiling Height Conditioned Volume <br /> Instructions Average Ceiling Height(ft) 8.5 11,739 <br /> Glazing and Doors U-Factor X Area = UA <br /> iu,uurnou:' 0.30 149 44.58 <br /> Insulation <br /> Attic U-Factor X Area = UA <br /> Instructions Ras 0.026 674 17.52 <br /> Single Rafter or Joist Vaulted Ceilings U-Factor Area UA <br /> Instructions - i <br /> No Vaolted Ceilings in this project. N . --- <br /> Above Grade Walls(see Figure 1) U-Factor Area UA <br /> instructions 0.056 662 37.07 <br /> R 21 <br /> Floors U-Factor Area UA <br /> instructions1 0.029 564 16.36 <br /> R30 <br /> 1. <br /> Below Grade Walls(see Figure 1) U-Factor Area UA <br /> In ghruclioug 1 ........ ...._ _.... __._ : I <br /> No Below Grade Walls in this project. --- --- <br /> Slab Below Grade(see Figure 1) F-Factor Len th UA <br /> Instructions _._�. <br /> I No Slab Below Grade in this project. --- <br /> Slab on Grade(see Figure 1) F-Factor Len•th UA <br /> InstructionsI 0.540 37 19.98 <br /> R.10 Perimeter J <br /> Location of Ducts <br /> Ii r;,lrur Iwo. J Duct Leakage Coefficient <br /> Conditioned Space <br /> 1.00 <br /> Sum of UA 135.51 <br /> Envelope Heat Load 6,369 Btu/Hour <br /> Figure 1. Sum of UA X AT <br /> ''" Air Leakage Heat Load 5,958 Btu/Hour <br /> �"' "',,„,, VolumeX 0.6X AT X.018 <br /> e <br /> Above Grade Building Design Heat Load 12,328 Btu/Hour <br /> a;'T ,s`i"1E Air Leakage+Envelope Heat Loss <br /> ' 'f” Building and Duct Heat Load 12,328 Btu/Hour <br /> Ducts in unconditioned space:Sum of Building Heat Loss X 1.10 <br /> Ducts in conditioned space:Sum of Budding Heat Loss X 1 <br /> Maximum Heat Equipment Output 17,259 Btu/Hour <br /> Budding and Duct Heat Loss X 1.40 for Forced Air Furnace <br /> Budding and Duct Heat Loss X 1.25 for Heat Pump <br /> (07/01/13) <br />