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Simple Heating System Size: Washington State _ This heating system sizing calculator is based on the Prescriptive Requirements of the 2018 Washington State Energy Code (W SEC) and ACCA Manuals J and S. This tool will calculate heating loads only ACCA procedures for sizing cooling systems should be used to determine cooling loads. 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 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 energycode@energy. wsu edu or (360) 956-2042 for assistance Project Information Contact information A & P Holding Mark Anderson ® Nash & Asso Architects 79th Pl. NF, Granite Falls (425) 242-7491 0413 1. marle ash-ArchtteaL m Heating System Type: O All other Symms O Meat Pump To see detailed instructions for each section, place your cursor on the word "Instructions" Design feml,crahme Design Temperature Difference (AT) 47 AT =Indoor (70 degrees) - Outdoor Design Temp Are, _, c.l:ii;Iluv Conditioned Floor Area Conditioned Floor Area (sq ft) 1.744 Average Ceiling Height Conditioned Volume Average Ceiling Height (ft) 8.41 14,702 Glazing and Doors U-Factor X Area = UA U-0.2e . y j 0 280 315 88.14 Skylights U-Factor X Area = UA 0.50 Insulation Attic U-Factor X Area = UA 0.026 926 24.08 Single Rafter or Joist Vaulted Ceilings U-Factor X Area UA 0.020 216 4.32 Above Grade Walls (see Figure 1) U-Factor X Area UA R-21 Intermediate . 0.056 1.934 108.32 b Floors U-Factor X Area UA R 36 . 0.025 1,142 28.55 Below Grade Walls (see Figure 1) U-Factor X Area UA Select R-value .. No selection L—� --- Slab Below Grade (s"Foure 11 F-Factor X Len th UA select conddionim . No selection !f_—�� ... Slab on Grade (see Fioure 1) F-Factor X Length UA selecc R-vawe . No selection I�'l --- Location of Ducts I i Duct Leakage Coefficient UnconditionedSpace .ena�rawtt�wrae;vw—� �_ _ 1.10 Sum of UA 253-41 Envelope Heat Load 11,910 Btu/Hour Figure 1 Sum of UA x AT Air Leakage Heat Load 7,463 Btu / Hour Volume x 0.6 x dT x 0.018 Building Design Heat Load 19,373 Btu / Hour 1*+ Air leakage + envelope heat loss Building and Duct Heat Load 21,310 Btu/Hour _ Ducts in unconditioned space: sum of building heat loss x 1.10 Ducts in conditioned space: sum of building heat loss x 1 Maximum Heat Equipment Output 26,638 Btu I Hour Buildinq and duct heat loss x 1.40 for forced air furnace Buldinq and duct heat loss x 1.25 for heat pump ( P (07101113)