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Simple Heating System Size: Washington State <br /> This heating system sizing calculator is based on the Prescriptive Requirements of the 2012 Washington State Energy Code(WSEC)and ACCA <br /> Manuals J and S This calculator will calculate heating loads only.ACCA procedures for sizing cooling systems should be used to determine cooling <br /> loads. <br /> The glazing(window)and door portion of this calculator assumes the installed glazing and door products have an area weighted average U-factor of <br /> 0.30. The incorporated insulation requirements are the minimum prescriptive amounts specified by the 2012 WSEC. <br /> 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, <br /> 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 <br /> Program at(360)956-2042 for assistance. <br /> Project Information Contact Information <br /> Plari T816 <br /> Heating System Type: <br /> To see detailed instructions for each section,place your cursor on the word"Instructions" <br /> Design Temperature <br /> Instructions <br /> Lynnwood Design Temperature Difference(4T) 46 <br /> AT=Indoor(70 degrees)-Outdoor Design Temp <br /> Area of Building <br /> Conditioned Floor Area <br /> Instructions Conditioned Floor Area(sq ft) 1,816 <br /> Average Ceiling Height Conditioned Volume <br /> Instructions Average Ceiling Height(ft) ,,; `„ 15,436 <br /> Glazing and Doors U-Factor X Area = UA <br /> Instructions 0.30 F`7' 7,___7 73.50 <br /> Insulation <br /> Attic U-Factor X Area = UA <br /> _ <br /> .. <br /> Instruction's f _. 0.026 L 94 f 24.47 <br /> Single Rafter or Joist Vaulted Ceilings U-Factor Area UA <br /> Instructions <br /> No Vaulted Ceilings in this project <br /> Above Grade Walls(see Figure l) U-Factor Area UA <br /> Instructions <br /> 0.056a j(:(3. �'; 117.60 <br /> R-21 <br /> Floors U-Factor Area UA <br /> :. <br /> Instructions 0.029 F,7. 200:` ' 5.80 <br /> R-30 <br /> Below Grade Walls(see Figure 1) U-Factor Area UA <br /> instrar..tionsNo Below Grade Walls in thispr <br /> protect iw. --' <br /> Slab Below Grade(see Figure 1) F-Factor Length UA <br /> LInstructions <br /> JLN.Slab Below Grade in this project <br /> Slab on Grade(see Figure 1) F-Factor Length UA <br /> .i�.am��,.......,._4xe.vsrr�b'.�: ...... e.�..: byz, -- <br /> Instructions 0.540 F 41771 22.14 <br /> R-10 Perimeter ° <br /> Location of Ducts <br /> Instructions - Duct Leakage Coefficient <br /> 91 Unconditioned Space <br /> 1.10 <br /> Sum of UA 243.51 <br /> Envelope Heat Load 11,201 Btu I Hour <br /> Figure 1. SumofUAXAT <br /> Air Leakage Heat Load 7,669 Btu I Hour <br /> VolumeX 0.6XATX.018 <br /> Above Grade Building Design Heat Load 18,870 Btu I Hour <br /> '""`�•�.,.,,, Air Leakage+Envelope Heat Loss <br /> Building and Duct Heat Load 20,757 Btu I Hour <br /> Ducts in unconditioned space:Sum of Building Heat Loss X 1.10 <br /> Ducts in conditioned space:Sum of Building Heat Loss X 1 <br /> Maximum Heat Equipment Output 29,060 Btu I Hour <br /> Building and Duct Heat Loss X 1.40 for Forced Air Furnace <br /> Building and Duct Heat Loss X 1.25 for Heat Pump <br /> /� / (07/01/13) <br />