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• Simple Heating System Size: Washington 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. 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 Reykdal 1380-2 Heating System Type: 0411 Other Systems CHeat Pump To see detailed instructions for each section,place your cursor on the word"instructions". Design Temperature j Design Temperature Difference(AT) 49 Everett AI`B AT=Indoor(70 degrees)-Outdoor Design Temp Area of Building Conditioned Floor Area Conditioned Floor Area(sq ft) 1,380 Average Ceiling Height Conditioned Volume Average Ceiling Height(ft) 8.7 12,006 Glazing and Doors U-Factor X Area = UA 11-0 30 . 0.300 257 76.98 Skylights U-Factor X Area = UA 0.50 4 2.00 Insulation Attic U-Factor X Area = UA R49_ 0.026 694 18-04 Single Rafter or Joist Vaulted Ceilings U-Factor X Area UA Select R Value v} No selection Above Grade Walls(see Figure 1) U-Factor X Area UA �R 21 Intermediate v 0.056 2,190 122.63 Floors U-Factor X Area 0-30 V 0.029 548 15.89 is Below Grade Walls(see Figure 1) U-Factor X Area UA Select R-value . No selection --- Slab Below Grade(see Figure 1) F-Factor X Len UA Select condiU r in ••• No selection � Slab on Grade(see Figure 1) F-Factor X Len r th UA CR-10 Perimeter v l J 0.540 50 27.00 Location of Ducts Duct Leakage Coefficient Unconrll tinned Space v lI 1.10 Sum of UA 262.54 Envelope Heat Load 12,865 Btu 1 Hour Figure 1. sum of uAX AT •. Air Leakage Heat Load 6,354 Btu/Hour Volume X 0.6 X AT X.018 Above Grade l Building Design Heat Load 19,218 Btu/Hour Air Leakage+Envelope Heat Loss Building and Duct Heat Load 21,140 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 29,596 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)