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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 0.FarmEed AjF 0 Heat RUFAP Contact Information <br /> �laii24s5 <br /> Heating System Type: <br /> To see detailed instructions for each section,place your cursor on the word'Instructions". <br /> Design Temperature <br /> Instructions �• 4 � Design Temperature Difference(AT) 46 <br /> Lynnwood AT=Indoor(70 degrees)-Outdoor Design Temp <br /> Area of Buildinq <br /> Conditioned Floor Area <br /> Instructions Conditioned Floor Area(sq ft) 2;435 <br /> Average Ceiling Height Conditioned Volume <br /> Instructions Average Ceiling Height(ft) 815 20,698 <br /> Glazing and Doors U-Factor X Area = UA <br /> Instructions 0.30 4 131.40 <br /> Insulation <br /> Attic U-Factor X Area = UA <br /> Instructions R-49 Vv� ® 0.026 99G 25.90 <br /> Single Rafter or Joist Vaulted.Ceilings U-Factor Area UA <br /> _. � <br /> Instructions No Vaulted Ceilings in this project <br /> Above Grade Walls(see Figure l) U-Factor Area UA <br /> Instructions 0.056 2,500'` ` 140.00 <br /> R-21 <br /> Floors U-Factor Area UA <br /> Instrructions <br /> R-3o �r 0.029 47.0. 13.63 <br /> Below Grade Walls(see Figure 1) LI-Factor Area UA <br /> Instructions --- <br /> No Befow Grade Its In this project <br /> Slab Below Grade(see Figure 1) _„• F-Factor Length UA <br /> Instructions <br /> -- .. <br /> No Slab Below Grade In this project <br /> Slab on Grade(see Figure ) F-Factor Length UA <br /> instructions _._.. , <br /> R-10 Perimeter 0.540 88.' 44.28 <br /> Location of Ducts <br /> Instructions __ - Duct Leakage Coefficient <br /> Unconditioned Space 7 1.10 <br /> Sum of UA 355.21 <br /> Envelope Heat Load 16,339 Btu t Hour <br /> Figure 1. Sum of UAXAT <br /> Air Leakage Heat Load 10,283 Btu I Hour <br /> VolumeX 0.6XATX.018 <br /> Above�Grade Building Design Heat Load 26,622 Btu I Hour <br /> "'^.-._.. Air Leakage+Envelope Heat Loss <br /> Building and Duct Heat Load 29,284 Btu I Hour <br /> Ducts in unconditioned space:Sum of Building Heat Loss 1.10 <br /> Ducts in conditioned space:Sum of Building Heat Loss X i <br /> Maximum Heat Equipment Output 40,998 Btu!Hour <br /> Building and Duct Heat Loss X 1.40 for Forced Air Furnace <br /> Building and Duct Heat ss X 1.25 for Heat Pump <br /> V (07101113) <br /> L <br />