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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 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 />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 />Dagg Residence Rad Design <br />1819 Rucker Ave 425 252 2789 <br />Eve ret wa <br />Heating System Tune: OO All Other Systems O Heat Pump <br />To see detailed instructions for each section, place your cursor on the word 'Instructions". <br />Design Temperature <br />— Design Temperature Difference (AT) <br />I = Indoor (70 degrees) - Outdoor Design Temp <br />Area of Building <br />Conditioned Floor Area <br />Conditioned Floor Area (sci ft) <br />1,867 <br />Average Ceiling Height <br />Conditioned Volume <br />Average Ceiling Height (ft) <br />8.5 <br />15,870 <br />Glazing and Doors <br />U-Factor <br />X Area = <br />UA <br />Instructions <br />J <br />No selection <br />819 <br />Skylights <br />U-Factor <br />X Area = <br />UA <br />instructions <br />0.50 <br />--- <br />Insulation <br />Attic <br />U-Factor <br />X Area = <br />UA <br />ructions I Rae <br />0.026 <br />1,266 <br />32.92 <br />Single Rafter or Joist Vaulted Ceilings <br />U-Factor <br />X Area <br />UA <br />SO- R Uu <br />-RUu <br />. ) <br />No selection <br />--- <br />Above Grade Walls (see Figure 1) <br />U-Factor <br />X Area <br />UA <br />Sele,R-,,Ue <br />No selection <br />2,880 <br />Floors <br />No Floors above uncond,bonee spies. <br />I <br />� <br />U-Factor <br />X Area <br />UA <br />Below Grade Walls (see Figure 1) <br />- - J <br />U-Factor <br />X Area <br />UA <br />0.042 <br />840 <br />35.28 <br />Slab Below Grade (see Figure t)N^ <br />F-Factor <br />X Length <br />UA <br />me�.l Break at slab edge <br />L.L <br />. I <br />0.570 <br />140 <br />79.80 <br />Slab on Grade (see Figure 1) <br />F-Factor <br />X Length <br />UA <br />„-RVA-., <br />No selection <br />� <br />Location of Ducts <br />Duct Leakage Coefficient <br />Vmmd ,oned Space <br />1.10 <br />Figure 1. <br />Above Grade <br />47 <br />Sum of UA <br />148.00 <br />Envelope Heat Load <br />6,956 <br />Btu / Hour <br />Sum of UA X 4T <br />Air Leakage Heat Load <br />8,055 <br />Btu / Hour <br />VolumeX 0.6XATX.018 <br />Building Design Heat Load <br />15,011 <br />Btu / Hour <br />Air Leakage + Envelope Heat Loss <br />Building and Duct Heat Load <br />16,512 <br />Btu / Hour <br />Ducts in unconditioned spaces Sum of Building Heat Loss X <br />1.10 <br />Ducts in conditioned space Sum of Building Heat Loss X 1 <br />Maximum Heat Equipment Output <br />23,117 <br />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 />(01111113) If 1 I <br />