Napoleon BGD36CFNTR Installation And Operating Instructions Manual page 18

8
bGD36CF TOP OR REAR EXIT VERTICAL TERMINATION
when (H ) < (V )
T T
Simple venting configurations
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
For vent configurations requiring more than zero 90° elbow
(top exit) or one 90° elbow (rear exit), the following formulas
apply:
Formula 1: H
T
Formula 2: H + V
T
W45-0566 / A / 07..06
.
.
T
< V
T
< 40 feet
T
Example 6:
FIGURE 34
V
= 5 ft
1
V
= 0 ft
2
V = V + V
T 1
H
=  ft
1
H
= .5 ft
2
H = H + H
R 1
H
= .0(three 90° elbows - 90°)
O
= .0(90 + 90 + 90 - 90) = 5.4 ft
H = H + H
T R
H + V
= 0.9 + 5 = 5.9 ft
T T
H
Formula :
0.9 < 5
H
H
Formula :
T
5.9 < 40
Since both formulas are met, this vent configuration is
acceptable.
for the
T
90°
H
V
H 1
1
90°
= 5 + 0 = 5 ft
2
=  + .5 = 5.5 ft
2
= 5.5 + 5.4 = 0.9 ft
O
< V
T T
+ V < 40 feet
T T
V
2
2
90°