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• <br /> 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 /> 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 /> Seahurst Remodel American Home Planners <br /> (425)258-6400 <br /> Heating System Type: ®All Other Systems 0 Heat Pump <br /> To see detailed instructions for each section,place your cursor on the word"Instructions". <br /> Design Temperature <br /> instructions --- — ---------- Design Temperature Difference(AT) 47 <br /> Everett JC -_-_ ® <br /> AT=Indoor(70 degrees)-OutdoorDesign Temp <br /> Area of Building <br /> Conditioned Floor Area <br /> instructions Conditioned Floor Area(sq ft) 2,484 <br /> Average Ceiling Height Conditioned Volume <br /> instructions Average Ceiling Height(ft) 8.0 19,872 <br /> Glazing and Doors U-Factor X Area = UA <br /> Instructions <br /> 0.30 334 _ 100.20 <br /> Skylights U-Factor X Area = UA <br /> Instructions 0.50 <br /> Insulation <br /> Attic U-Factor X Area = UA <br /> !n=_tructian 1R-38 Advanced--------- ----�� 0.026 1,104 28.70 <br /> Single Rafter or Joist Vaulted Ceilings U-Factor X Area UA <br /> :,structi;n' 1R-38Vented — - irj 0.027 <br /> Above Grade Walls(see Figurer) U-Factor X Area UA <br /> :n.tructions R z1 Intermediate — v 0.056 1,636 91.62 <br /> Floors U-Factor X Area UA <br /> Instructions -----'--'-- <br /> C Floors above unconditioned spaces. t --- <br /> Below Grade Walls(see Figure 1) U-Factor X Area UA <br /> Instructions R-21 Interior t 0.042 924 38.81 <br /> Slab Below Grade(see Figure 1) F-Factor X Len s th UA <br /> Instructions 0.570 132 75.24 <br /> R-5 Thermal Break at slab edge V <br /> Slab on Grade(see Figure 1) F-Factor X Length UA <br /> Instructions No Slab on Grade In this project. --- I <br /> Location of Ducts <br /> Instructions Duct Leakage Coefficient <br /> LUnconditioned Space <br /> — — — -- — —� 1.10 <br /> Sum of UA 334.57 <br /> Envelope Heat Load 15,725 Btu/Hour <br /> Figure 1. Sum ofUAXeT <br /> Air Leakage Heat Load 10,087 Btu I Hour <br /> VolumeX 0.6 X AT X.018 <br /> Above Grade Building Design Heat Load 25,812 Btu/Hour <br /> t Air Leakage+Envelope Heat Loss <br /> Building and Duct Heat Load 28,393 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 39,750 Btu I Hour (31; <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 /> (07/01/13) <br />