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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 Energy 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 Plan 2407 Heating System Type: O All Other Systems 0 Heat Pump To see detailed instructions for each section,place your cursor on the word"Instructions". Design Temperature Instructions __._.__.. �.._ _ .__ Design Temperature Difference(4T) 49 IN Everett Paine AFB . AT=indoor(70 degrees)-Outdoor Design Temp Area of Building Conditioned Floor Area Instructions Conditioned Floor Area(sq ft) 2,407 Average Ceiling Height Conditioned Volume Instructions Average Ceiling Height(ft) 8.5 20,460 Glazing and Doors U-Factor X Area = UA Instructions 0.30 448 134.40 Skylights U-Factor X Area = UA Instructions 0.50 --- Insulation Attic U-Factor X Area = UA Instructions kgj R-49 .' 0.026 1,120 29.12 Single Rafter or Joist Vaulted Ceilings U-Factor X Area UA Instructions R..u..... __ m 38'Vented i' 0.027 Above Grade Walls(see Figure 1) U-Factor X Area UA Instructions ..._...__.Inter Intermediate- R-21 Intermediate - 0.056 2,700 151.20 Floors U-Factor X Area UA InstructionsR-30 0.029 0.029 590 17.11 Below Grade Walls(see Figure 1) U-Factor X Area UA Instructions No Below Grade walls in this project. Slab Below Grade(see Figure t) F-Factor X Length UA Instructions I "'� g"' """"-- „�''' No selection --- Select conditionin Slab on Grade(see Figure i) F-Factor X Len th UA Instructions R-io Penmeter 0.540 k36' 73.44 Location of Ducts Instructions Duct Leakage Coefficient No Ducts 'f' 1.00 Sum of UA 405.27 Envelope Heat Load 19,858 Btu/Hour Figure 1. Sum ofuAXAT Air Leakage Heat Load 10,827 Btu/Hour VolumeX 0.6XATX.018 Above Grads Building Design Heat Load 30,685 Btu/Hour Air Leakage-Envelope Heat Loss Building and Duct Heat Load 30,685 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 42,960 Btu/Hour Building and Duct Heat Loss X 1.40 for Forced Air Furnace BuildingandDuct H t Loss X 1.25 for Heat Pump / j (07/01/13)