Napoleon BGD42CFN Installation And Operating Instructions Manual

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Napoleon BGD42CFN Installation And Operating Instructions Manual Manual pdf 15 page image

15W415-0779 / D / 08.13.123.9 VERTICAL TERMINATION(H T) < (VT)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 more than one 45° and one 90° elbow, the following formulas apply:Formula 1: HT < VTFormula 2: HT + VT < 40 feetExample:V1 = 5 FTV2 = 10 FTVT = V1 + V2 = 5 + 10 = 15 FTH 1 = 3 FTH2 = 2.5 FTHR = H1 + H2 = 3 + 2.5 = 5.5 FTH O = .03 (one 45° + three 90° elbows - 135°)= .03 (45 + 270 - 135°) = 5.4 FTH T = HR + HO = 5.5 + 5.4 = 10.9 FTH T + VT = 10.9 + 15 = 25.9 FTFormula 1: HT < VT10.9 < 15Formula 2: HT + VT < 40 FT25.9 < 40Since both formulas are met, this vent configuration is acceptable.The shaded area within the lines represents acceptablevalues for H T and V T0 5 10 15 2040102030390°V 1H 1H 290°90°18.345°V 2