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.r . . <br /> . <br /> outside air film .17 <br /> stucco .20 <br /> felt .� <br /> 6" fibergiass 19.00 <br /> air space .87 <br /> Sheet rock .45 <br /> inside air film .68 <br /> total 21.43 r value <br /> perimeter walls .047 u value <br /> buried foundation walls <br /> concrete .88 <br /> fiberglass 11.00 <br /> air space .87 <br /> sheetrock .45 <br /> inside air film .68 <br /> total 13.88 r value <br /> buried foundation .072 u value <br /> gross wall area 3422 sq ft <br /> gross window area 524 sq ft <br /> gross door area 97 sq ft <br /> net wall area 2801 sq ft x (u) .047 x 100 Deg = 13,164 <br /> window area 524 sq ft x (u) .35 x 100 Deg = 18,340 <br /> door area 97 sq ft x (u) .49 x 100 Deg = 4,753 <br /> roof area 2215 sq ft x (u) .026 x 100 Deg = 5,759 <br /> basement floor area 2164 sq ft x (u) 2.27 x 15 Deg = 73,684 <br /> buried foundation 1856 sq ft x (u) .072 x 40 Deg = 5,348 <br /> window infiltration 245 lin ft x .09 cfm x 60 x .018 x100 = 2,381 <br /> door ir�filtration 57 lin ft x .25 x 60 x .018 x 100 = 1,539 <br /> ventilation make up 200 cfm x .018 x 100 x .65 = 234 <br /> total heat loss 125,202 BTUH <br />