Napoleon BGD36CFNTR Installation And Operating Instructions Manual page 17

BGD36CF TOP OR REAR EXIT VERTICAL TERMINATION
when (H ) < (V )
T T
Simple venting confi gurations
FIGURE 33
REQUIRED
VERTICAL RISE
IN FEET
V
T
HORIZONTAL VENT RUN PLUS OFFSET IN FEET
The shaded area within the lines represents acceptable
values for H and V .
T T
See graph to determine the required vertical rise V
required horizontal run H .
T
For vent confi gurations requiring more than zero 90° elbow
(top exit) or one 90° elbow (rear exit), the following formulas
apply:
Formula 1: H < V
T
Formula 2: H + V
T T
for the
T
T
< 40 feet
Example 6:
FIGURE 34
V = 5 ft
1
V = 10 ft
2
V = V + V
T 1 2
H = 3 ft
1
H = 2.5 ft
2
H = H + H
R 1 2
H = .03(three 90° elbows - 90°)
O
= .03(90 + 90 + 90 - 90) = 5.4 ft
H = H + H
T R O
H + V = 10.9 + 15 = 25.9 ft
T T
Formula 1: H < V
T
10.9 < 15
Formula 2: H + V
H
T
T
25.9 < 40
Since both formulas are met, this vent confi guration is
acceptable.
90°
H
2
V
1
H
1
90°
= 5 + 10 = 15 ft
= 3 + 2.5 = 5.5 ft
= 5.5 + 5.4 = 10.9 ft
T
< 40 feet
T
W415-0566 / D / 08.30.07
17
V
2
90°