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Simple Heating System Size: Washington State <br />This heating system sizing calculator is based on the Prescriptive Requirements of the 2015 Washington State Energy Code (WSEC) and ACCA <br />Manuals .1 and S. This calculator will calculate heating loads only. ACCA procedures for sizingcooling ooling 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 2015 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 />Lee Residence - Fire Repair & Add'n GK Structural Engineering, LLC <br />4328 Forest Dr 147031st Lane NE, #20S <br />Everett, WA 98203 Duvall, WA 98019 <br />Heating System Tv—: 0AII Other Systems Weat Rump <br />To see detailed instructions for each section, place your cursor on the word 'Instructions'. <br />Design. Temperatu, <br />j Design Temperature Difference (AT) <br />Everett JC •) AT = Indoor (70 degrees) - OUWWDesfgn Temp <br />Area of Building <br />Conditioned Floor Area <br />- Conditioned Floor Area (sq ft) <br />2,329 <br />Average Ceiling Height <br />Conditioned Volume <br />i. - "'' Average Ceiling Height (ft) <br />8.0 <br />18,632 <br />Glazing and Doors <br />U-Factor <br />X Area = <br />UA <br />0.30 <br />255 <br />76.62 <br />Skylights ights <br />U-Factor <br />X Area = <br />UA <br />0.50 <br />© <br />-- <br />Insulation <br />Attic <br />U-Factor <br />X Area = <br />UA <br />Rey <br />. <br />0.026 <br />17192 <br />30.99 <br />T <br />.. ., - <br />.,. <br />Single Rafter or Joist Vaulted Ceilings <br />U-Factor <br />X Area <br />UA <br />Select R-Value <br />No selection <br />Above Grade Walls (see Figure 1) <br />U-Factor <br />X Area <br />UA <br />G R-21Intermediate <br />1 <br />j <br />0.056 <br />F2037 <br />114.07 <br />Floors - <br />U-Factor <br />X Area <br />UA <br />0.029 <br />F_7450­1 <br />13.05 <br />Below Grade Walls (see Figure 1) <br />U-Factor <br />X Area <br />UA <br />R 21 Interior <br />j <br />0.042 <br />749 <br />31.46 <br />Slab Below Grade (see Figure v <br />F-Factor <br />X Length <br />UA <br />R-5 Thermal Break at slab edge <br />0.570 <br />107 <br />60.99 <br />Slab on Grade (see Figure 1) <br />F-Factor <br />X Length <br />UA <br />C . r5elecr R-Value <br />No selection <br />— <br />Location of Ducts <br />L Uncondititoned Space <br />Duct Leakage Coefficient <br />E.�• wh A <br />1.10 <br />Sum of UA <br />327.18 <br />Figure 1. <br />Above Grade <br />47 <br />Envelope Heat Load <br />15,378 Btu / Hour <br />Sum of UA X AT <br />Air Leakage Heat Load <br />9,458 Btu / Hour <br />VdumeX 0.6XATX.018 <br />Building Design Heat Load <br />24,835 Btu / Hour <br />Air Leakage + Envelope Heat Loss <br />Building and Duct Heat Load <br />27,319 Btu / Hour <br />Ducts in unconditioned space: Sum of Building Heat Loss X <br />1.10 <br />Ducts in conditioned space: Sum of ButOag Heat Loss X 1 <br />Maximum Heat Equipment Output <br />34,148 Btu / Hour <br />Building and Duct Heat Loss X 1.40 for Forced Air Fumace <br />Building and Duct Heat Los$X 1.25 for Heat Pump <br />(07101113) <br />