Napoleon BGD48N Installation And Operation Instructions Manual page 11

HORIZONTAL TERMINATION
when (H ) > (V )
T T
Simple venting confi guration (only one 45º and 90° elbow)
See graph to determine the required
vertical rise V for the required hori-
T
zontal run H .
T
REQUIRED
VERTICAL
RISE IN
INCHES (V )
T
HORIZONTAL VENT RUN PLUS OFFSETS IN FEET
The shaded area within the lines represents acceptable values
for H and V .
T T
For vent confi gurations requiring more than one 45º and 90° elbow
the following formulas apply:
Formula 1: H < 4.2 V
T T
Formula 2: H + V < 24.75 feet
T T
Example 2:
FIGURE 9
FIGURE 8
V
1
V
2
V
T
H
1
H
2
H
3
H
4
H
R
H
O
H
T
H + V
T
Formula 1:
Formula 2:
Since both formulas are met, this vent confi guration is ac-
ceptable.
90°
90°
H
1
90°
V
1
45°
= 4 ft
= 1.5 ft
= V + V = 4 ft + 1.5 ft = 5.5 ft
1 2
= 2 ft
= 1 ft
= 1 ft
= 1.5 ft
= H + H + H + H = 2 + 1 + 1 + 1. 5 = 5.5 ft
1 2 3 4
= .03 (one 45º elbow + four 90º elbows -135º)
=.03 (405-135)=8.1ft
= H + H = 5.5 + 8.1 = 13.6ft
R O
= 13.6 + 5.5 = 19.1 ft
T
H < 4.2 V
T T
4.2 V = 4.2 x 5.5 = 23.1 ft
T
13.6 < 23.1
H + V < 24.75 feet
T T
19.1 < 24.75
11
90°
H
4
H
V
3
2
H
2
W415-0326 / C / 11.23.07