Napoleon BGD36CFNTR Installation And Operating Instructions Manual page 15

BGD36CF(G) TOP OR REAR EXIT VERTICAL TERMINATION
Example 8:
90°
H
2
V
1
H
1
90°
45°
H
3
FIGURE 33
V = 1.5 ft
1
V = 5 ft
2
V = V + V = 1.5 + 5 = 6.5 ft
T 1 2
H = 1 ft
1
H = 1 ft
V
2
2
H = 10.75 ft
3
H = H + H + H = 1 + 1 + 10.75 = 12.75 ft
R 1 2 3
H = .03 (three 90° elbows + one 45° elbow - 90°)
O
= .03(90 + 90 + 90 + 45 - 90) = 6.75 ft
90°
H = H + H = 12.75 + 6.75 = 19.5 ft
T R O
H + V = 19.5 + 6.5 = 26 ft
T T
Formula 1: H < 3V
T
19.5 < 19.5
Formula 2: H + V
T
26 < 40
Since both formulas are met, this vent confi guration is accept-
able.
T
3V = 3 x 6.5 = 19.5 ft
T
< 40 feet
T
W415-0661 / C / 02.20.08
15