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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 ACCA <br /> Manuals J and S.This tool will calculate heating loads only.ACCA procedures for sizing cooling systems should be used to determine 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 section,some <br /> values will be calculated for you.If you do not see the selection you need in the drop-down options,please contact the WSU Energy Program at <br /> energycode@energy.wsu.edu or(360)956-2042 for assistance. <br /> Project Information Contact Information <br /> Richard Sullivan Basement Dwelling Unit Addtion <br /> QQ 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 /> Instructions —EverettlC Design Temperature Difference(a 47 <br /> AT=Indoor(7O degrees)-Outdoor Design Temp <br /> Area of Sui!d!ne <br /> Conditioned Floor Area <br /> Conditioned Floor Area(sq ft) 720 <br /> Average Ceiling Height Conditioned Volume <br /> "`' ""i5 Average Ceiling Height(ft) 8.0 5,760 <br /> Glazing and Doors U-Factor X Area = UA <br /> Instructions <br /> I u-0.30 — 0.300 77 23.10 <br /> Skylights --- �— U-Factor X Area = UA <br /> Instructions <br /> 0.50 — <br /> Insulation <br /> 'fie U-Factor X Area = UA <br /> Instructions — <br /> Select R-Value No selection — <br /> Single Rafter or Joist Vaulted Ceilings — Y� U-Factor X Area UA <br /> Instructions - <br /> Select R-value . No selection — <br /> Above Grade Walls rseeFnure 1)— l U-Factor X Area UA <br /> InstrucGoi.; R-21 intermediate 0.056 298 16.69 <br /> Floors U-Factor X Area UA <br /> Instructions - <br /> select R-value No selection — <br /> Below Grade Walls(see Figure1) l U-factor X Area UA <br /> Instructions I R 2 interior 0.042 297 12.47 <br /> Slab Below Grade(see Figure 1) - J F-Factor X Length UA <br /> R-5 Thermal Break at slab edge 0.570 54 30.78 <br /> Slab on Grade(see Figure 1) f F-Factor X Length UA <br /> Instructions R_to Pe meter 0.540 29.16 <br /> Location of Ducts <br /> Instructions - -- Duct Leakage Coefficient <br /> Conditioned Space 1.00 <br /> Sum of UA 112.20 <br /> Envelope Heat Load 5,273 Btu/Hour <br /> Figure 1. Sum of UA x AT <br /> Air Leakage Heat Load 2,924 Btu/Hour <br /> Volume x 0.6 x oT x 0.018 <br /> A Building Design Heat Load 8,197 Btu/Hour <br /> Air leakage+envelope heat loss <br /> Building and Duct Heat Load 8,197 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 11.476 Btu I Hour <br /> Buildino and duct heat loss x 1.40 for forced air furnace <br /> Buildincr and duct heat loss x 1.25 for heat Dump <br /> (07/011131 <br />