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Heat Loss Calculation Worksheet For: <br /> Apex heating and cooling inc. <br /> City: Orono <br /> Contractor!Owner: John Horoashak <br /> Job Address: 890 Windjammer Ln. <br /> Calculated with Delta T of 90 <br /> Amount "U" Factor Factor BTUH Loss <br /> Square feet of exposed wall area above grade: 3010 0.05 13545 <br /> Square feet of exposed window area: 1800 0.55 89100 <br /> Square feet of ceiling area: 2350 0.03 6345 <br /> Square feet of basement/crawl space floor area: 1400 0.03 3780 <br /> Square feet of wall area below grade: 2080 0.09 16848 <br /> Linear feet of infiltration for windows: 1990 0.5 1.085 1080 <br /> Linear feet of infiltration for doors: 204 1.25 1.085 277 <br /> Linear feet of infiltration for sliding doors: 589 0.75 1.085 479 <br /> Allowance for kitchen and bath fans <br /> Kitchen fans @ 600 BTUH: 1 600 600 <br /> Bath fans @ 200 BTUH: 4 200 800 <br /> Allowance for fireplaces @ 1300 BTUH: 2 1300 2600 <br /> Total BTUH loss: 135454 <br /> Add for combustion air(.001 x net x 12.5 x.075 x 90): 11429 <br /> Total: 146882 <br /> Maximum allowable(Total x 115%) 168915 <br /> BTUH output of furnace must fall between: 146882 and 168915 <br /> Date: / / ! I Signature: a----11-A" <br /> -- Z ' <br />