Napoleon HD35NT, HD40NT Installation And Operating Instructions Manual

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Napoleon HD35NT, HD40NT Installation And Operating Instructions Manual Manual pdf 17 page image

17W415-0820 / D / 02.03.12(H T ) < (V T )Simple venting configurations. See graph to determine the required vertical rise VT for therequired horizontal run HT.REQUIREDVERTICALRISE INFEET VTHORIZONTAL VENT RUN PLUS OFFSET IN FEET H TFor vent configurations requiring one or more 90° elbows the following formulas apply:Formula 1: HT < VTFormula 2: HT + VT < 40 feetExample:V1 = 5 FTV2 = 6 FTV3 = 10 FTVT = V1 + V2 + V3 = 5 + 6 + 10 = 21 FTH1 = 8 FTH2 = 2.5 FTHR = H1 + H2 = 8 + 2.5 = 10.5 FTH O = .03 (four 90° elbows - 90°)= .03 (360° - 90°) = 8.1 FTH T = HR + HO = 10.5 + 8.1 = 18.6 FTH T + VT = 18.6 + 21 = 39.6 FTFormula 1: HT < VT18.6 < 21Formula 2: HT + VT < 40 FT39.6 < 40Since 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 10 15 20401020303V318.13.9 VERTICAL TERMINATION