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Simple Heating System Size: Washington State This heating system sizing calculator is based on the Prescriptive Requirements of the 2012 Washington State Enemy Code(WSEC)and ACCA Manuals J and S.This calculator will calculate heating loads only.ACCA procedures for sizing cooling systems should be used to determine cooling loads. The glazing(window)and door portion of this calculator assumes the installed glazing and door products have an area weighted average U-factor of 0.30. The incorporated insulation requirements are the minimum prescriptive amounts specified by the 2012 WSEC. 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, 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 Program at(360)956-2042 for assistance. Project Information Contact Information Unit El Townhome Polygon Northwest Eclipse Jamie Aubrey Everett,Washington (425)586-7700 Heating System Type: ()Forced Air Furnace 0 Heat Pump To see detailed instructions for each section,place your cursor on the word instructions". Design Temperature Instructions '-" Design Temperature Difference(ST) 47 Everett JC . AT--Indoor(70 degrees)-Outdoor Design Temp Area of Building Conditioned Floor Area Instruction: Conditioned Floor Area(sq ft) 1,344 Average Ceiling Height Conditioned Volume Instructions Average Ceiling Height(ft) 8.5 11,424 Glazing and Doors U-Factor X Area = UA instructions 0.30 183 54.78 Insulation Attic U-Factor X Area = UA R,19 w igjj 0.026 591 15.37 Single Rafter or Joist Vaulted Ceilings U-Factor Area UA No Vaulted Ceilings in this project_ w --- Above Grade Walls(see Figure 1) U-Factor Area UA instructlor,. _ 0.056 413 23.13 R 21 Floors U-Factor Area UA instructions 0.029 345 10.01 R-30 w ---,-.44111111111111.11111111111W- ' Below Grade Walls(see Figure 1) U-Factor Area UA ._„,— I nstructions No Below Grade Walls ro this project w .._iim. Slab Below Grade(see Figure 1) F-Factor Length UA Instructions ___ No SIA Below Unite III ihls project w Slab on Grade(see Figure 1) F-Factor Length UA Instructions I 0.540 34 18.36 hits R 10 Perhneter Location of Ducts Instructions Duct Leakage Coefficient Conditioned Space 1.00 Sum of UA 121.64 Envelope Heat Load 5,717 Btu/Hour Figure 1. Sum of IJAXAT ..41111111111111111e.. Volume Leakage Heat Load 5,799 Btu/Hour VolumeX 0.6 XAT X.018 Above Grade Building Design Heat Load 11,516 Btu/Hour Air Leakage+Envelope Heat Loss Building and Duct Heat Load 11,516 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 16,122 Btu/Hour Building and Duct Heat Loss X 1.40 for Forced Air Fumace Building and Duct Heat Loss X 1.25 for Heat Pump (07/01/13)