Napoleon Park Avenue GD82NT Installation And Operation Instructions Manual

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8W415-0536 / D / 05.18.07REQUIRED VERTICALRISE IN FEETVTHORIZONTAL VENT RUN PLUS OFFSET INFEET H Twhen (H T ) < (V T )FIGURE 9For vent configurations requiring more than zero90° elbow (top exit) or one 90° elbow (rear exit), thefollowing formulas apply:Formula 1: H T < V TFormula 2: H T + V T < 40 feetSee graph todetermine therequired vertical riseVT for the requiredhorizontal run HT.TOP EXIT VERTICAL TERMINATIONThe shaded area within the lines represents ac-ceptable values for H T and VT .MAXIMUMVERTICALRISE INFEETVTHORIZONTAL VENT RUN PLUS OFFSET IN FEET HTThe shaded area within the lines represents acceptablevalues for H T and VT .See graph to determine the required vertical rise VT for therequired horizontal run HT.FIGURE 11V3 = 1.5 ftVT = V1 + V2 + V3 = 2 + 1 + 1.5 = 4.5 ftH 1 = 6 ftH 2 = 2 ftHR = H1 + H2 = 6 + 2 = 8 ftHO = .03 (four 90° elbows - 90°)= .03(90 + 90 + 90 + 90 - 90) = 8.1 ftH T = H R + HO = 8 + 8.1 = 16.1 ftH T + V T = 16.1 + 4.5 = 20.6 ftFormula 1: H T < 3V T3VT = 3 x 4.5 = 13.5 ft16.1 > 13.5Since this formula is not met, this vent configuration isunacceptable.Formula 2: H T + V T < 40 feet20.6 < 40Since only formula 2 is met, this vent configurationis unacceptable and a new fireplace location or ventconfiguration will need to be established to satisfy bothformulas.FIGURE 10H 1H 2V3V190° 90°90°V290°when (H T ) > (V T )Simple venting configurationsTOP VERTICAL TERMINATIONFor vent configurations requiring more than two 90° elbow(top exit) or one 90° elbow (rear exit), the following formulasapply:Formula 1: H T < 3V TFormula 2: H T + V T < 40 feetExample 7:V1 = 2 ftV2 = 1 ft