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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 /> Holbrook Ave Mike Johnson @ Nash&Asso Architects <br /> (425)242-7490 <br /> michaelAaNash-Architects.com <br /> Heating System Type: 0 All Other Systems ®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(IT) 47 <br /> Everett.IC <br /> 4T=Indoor(70 degrees)-Outdoor Design Temp <br /> Area of Building <br /> Conditioned Floor Area <br /> 1rss1r2cbons Conditioned Floor Area(sq ft) 3,565 <br /> Average Ceiling Height Conditioned Volume <br /> d d i c>r}s Average Ceiling Height(ft) 9.0 32,085 <br /> Glazing and Doors U-Factor X Area = UA <br /> instructions <br /> U-0.28 . I 0.280 860 240.80 <br /> Skylights U-Factor X Area = UA <br /> instructions 0.50 <br /> Insulation <br /> Attic U-Factor X Area = UA <br /> i^struc3e<= s a-as . 0.026 1,308 34.01 <br /> Single Rafter or Joist Vaulted Ceilings U-Factor X Area UA <br /> No Vaulted Ceilings in this project <br /> Above Grade Walls(see Figure 1) U-Factor X Area UA <br /> R-21 Intermediate 0.056 2,340 131.04 <br /> Floors U-Factor X Area UA <br /> instructions R 38 0.025 1,931 48.28 <br /> Below Grade Walls(see Figure 1) U-Factor X Area UA <br /> instructions 0.042 325 13.65 <br /> s R 21 Interior <br /> Slab Below Grade(see Figure t) F-Factor X Length UA <br /> instructions 0.303 --- <br /> No Slab Below Grade in this project Nir <br /> Slab on Grade(see Figure 1) F-Factor X Length UA <br /> Instructions R-10 Fully Insulated . 0.360 135 48.60 <br /> Location of Ducts <br /> instructions - Duct Leakage Coefficient <br /> Conditioned Space se- <br /> 1.00 <br /> Sum of UA 516.37 <br /> Envelope Heat Load 24,270 Btu/Hour <br /> Figure 1. Sum of UA x AT <br /> Air Leakage Heat Load 16,286 Btu/Hour <br /> Volume x 0.6 x OT x 0.018 <br /> Above Grade Building Design Heat Load 40,556 Btu/Hour <br /> Air leakage+envelope heat loss <br /> Building and Duct Heat Load 40,556 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 50,695 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 />