Napoleon GX70NT Installation And Operating Instructions Manual

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Napoleon GX70NT Installation And Operating Instructions Manual Manual pdf 17 page image

17W415-1519 / C / 11.06.15EN3.9 TOP EXIT VERTICAL TERMINATION(H T ) < (V T )Simple venting configurations. See graph to determine the required vertical rise V T for therequired horizontal run HT.REQUIREDVERTICALRISE IN FEET(METERS) VTHORIZONTAL VENT RUN PLUS OFFSET IN FEET (METERS) HTFor vent configurations requiring one or more 90° elbows the following formulas apply:Formula 1: HT < VTFormula 2: HT + VT < 40 feet (12.2m)Example:V1 = 5 FT (1.5m)V2 = 6 FT (1.8m)V3 = 10 FT (3.1m)VT = V1 + V2 + V3 = 5FT (1.5m) + 6FT (1.8m) + 10FT (3.1m) = 21FT (6.4m)H1 = 8 FT (2.4m)H2 = 2.5 FT (0.8m)HR = H1 + H2 = 8FT (2.4m) + 2.5FT (0.8m) = 10.5 FT (3.2m)H O = .03 (four 90° elbows - 90°)= .03 (360° - 90°) = 8.1 FT (2.5m)H T = HR + HO = 10.5FT (3.2m) + 8.1FT (2.5m) = 18.6FT (5.7m)H T + VT = 18.6FT (5.7m) + 21FT (6.4m) = 39.6FT (12.1m)Formula 1: HT < VT18.6FT (5.7m) < 21FT (6.4m)Formula 2: HT + VT < 40 FT (12.19m)39.6FT (12.1m) < 40FT (12.2m)Since both formulas are met, this vent configuration is acceptable.90°V 1V 2H 1H 2The shaded area within the lines represents acceptablevalues for H T and V T90°90°90°0 5(1.5)10(3.1)15(4.6)20(6.1)40 (12.2)10 (3.1)20 (6.1)30 (9.1)3 (0.9)V318.1A