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f <br /> S <br /> Simple Heating System Size:Washington State <br /> This heating system sizing calculator is based on the Prescriptive Requirements of the 2018 Washington State Energy Code(WSEC)and <br /> ,:: <br /> ACCA Manuals J and S.This tool will calculate heating loads only.ACCA procedures for sizing cooling systems should be used to determine <br /> cooling loads. <br /> Please complete the green drop-downs and boxes that are applicable to your project.As you make selections in the drop-downs for each <br /> section,some values will be calculated for you.If you do not see the selection you need in the drop-down options,please contact the WSU <br /> Energy Program at energycode@energy.wsu.edu or(360)956-2042 for assistance. <br /> Project Information Contact Information <br /> Gathered House LLC <br /> 425-8914154 <br /> aI +" 'v` i {� chaj1ie®gather�dho e.com <br /> z <br /> Heating System Type: <br /> To see detailed instructions for each section,place your cursor on the word'Instructions" <br /> Design Temperature <br /> Instructions Design Temperature Difference(AT) 49 <br /> nT=Indoor(70 degrees)-Outdoor Design Temp <br /> Area of Building <br /> Conditioned Floor Area <br /> Conditioned Floor Area(sq ft) 860 <br /> Average Ceiling Height Conditioned Volume <br /> structrons Average Ceiling Height(ft) 7.3 6,304 <br /> Glazing and Doors U-Factor X Area = UA <br /> Instructions <br /> .28 119 33.32 <br /> Skylights U-Factor X Area = UA <br /> Instructions 0.50 <br /> Insulation <br /> Attic R-19 U-Factor X Area = UA <br /> Instructions <br /> Single Rafter or Joist Vaulted Ceilings U-Factor X Area UA <br /> Instructions � .049 860 42.14 <br /> Above Grade Walls(see Flgure 1) U-Factor X Area UA <br /> insu actions R 21 .057 865 49.31 <br /> Floors U-Factor X Area UA <br /> Instructions R-38 <br /> Below Grade Walls(see Figure 1) U-Factor X Area UA <br /> ■- .057 157 8.95 <br /> Slab Below Grade(see Figu►e 1) F-Factor X Length UA <br /> Instructions L r r''," No selection <br /> Slab on Grade(see Figure 1) F-Factor X Length UA <br /> R-10 .36 144 51.84 <br /> Location of Ducts <br /> Instructions Duct Leakage Coefficient <br /> Ductless heat pump-inside <br /> 1.00 <br /> Sum of UA 185.55 <br /> Envelope Heat Load 9,092 Btu/Hour <br /> Figure 1. Sum of UA x AT <br /> Air Leakage Heat Load 3,336 Btu/Hour <br /> _ Volumex 0.6xATx0.018 <br /> Above Grade Building Design Heat Load 12,428 Btu/Hour <br /> Air leakage+envelope heat loss <br /> Building and Duct Heat Load 12,428 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 15,535 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 /> (07/01/13) <br />