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Simple Heating System Size: Wasnington State This heating system sizing calculator is based on the Prescriptive Requirements of the 2015 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 2015 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 Krevskiy Residence Douglas Almond-NuttyCAD Drafting and Design 7-77th Place S.W. doug.almond@nuttycad.com Everett,Washington 98203 (206)225-0068 Heating System Type: ®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(AT) 49 Everett Paine AFB ..,, AT=Indoor(70 degrees)-Outdoor Design Temp Area of Building Conditioned Floor Area insiruct1ons Conditioned Floor Area(sq ft) 244 Average Ceiling Height Conditioned Volume instructions Average Ceiling Height(ft) 8.0 1,952 Glazing and Doors U-Factor X Area = UA instructions 0.30 57 17.19 Skylights U-Factor X Area = UA Instructions 0.50 --- Insulation Attic U-Factor X Area = UA Instructions 1E38 Advanced 0.026 244 _ 6.34 Single Rafter or Joist Vaulted Ceilings U-Factor X Area UA Instructions — No selection Select R-Value v --- Above Grade Walls(see Figure 1) U-Factor X Area UA Instructions R-21 Intermediate 0.056 355 19.86 Floors U-Factor X Area UA instructions — 0.025 244 6.10 R-38 ► Below Grade Walls(see Figure 1) U-Factor X _ Area UA insirUCiione - - lection Select R-value No se '-- Slab Below Grade(see g FiI�1 gure 1) F-Factor X Len UA Instructions —' No selection Selectconditioning � --- Slab on Grade(see Figure 1) F-FactorcX Le UA Instructions -- No selection SelectR-Value --- Location of Ducts insiructi"ns Duct Leakage Coefficient Unconditioned Space t s" 1.10 Sum of UA 49.50 Envelope Heat Load 2,425 Btu/Hour Figure 1. Sum ofuAXAT Air Leakage Heat Load 1,033 Btu/Hour Volume X 0.6 X AT X.016 Above Grade Building Design Heat Load 3,458 Btu/Hour Air Leakage+Envelope Heat Loss Building and Duct Heat Load 3,804 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 5,326 Btu/Hour Building and Duct Heat Loss X 1.40 for Forced Air Furnace Building and Duct Heat Loss X 1.25 for Heat Pump (07/01/13)