Napoleon BGD36PTR Installation And Operation Instructions Manual page 12

12
REAR EXIT / HORIZONTAL TERMINATION
when (H ) > (V )
T T
Simple venting configuration (only two 90° elbows)
FIGURE 13
See graph to determine the required vertical rise V
required horizontal run H
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 configurations requiring more than two 90° elbows
the following formulas apply:
Formula 1: H < 3.5V
T
Formula 2: H + V
T
W415-0210 / E / 06.25.03
T
.
T
< 24.75 feet
T
Example 5:
for the
T
V
= 4 ft
1
V
= 1.5 ft
2
V = V + V
T 1
H
= 2 ft
1
H = 1 ft
2
H
= 1 ft
3
H
= 1.5 ft
4
H = H + H
R 1
H
= .03(four 90° elbows + one 45° elbow - 90°)
O
= .03(90 + 90 + 90 + 90 + 45 - 90) = 9.45 ft
H = H
T R
H + V
= 14.95 + 5.5 = 20.45 ft
T T
H
Formula 1:
H
14.95 < 19.25
H
Formula 2:
20.45 < 24.75
Since both formulas are met, this vent configuration is ac-
ceptable.
FIGURE 14
= 4 + 1.5 = 5.5 ft
2
+ H + H = 2 + 1 + 1 + 1.5 = 5.5 ft
2 3 4
+ H
= 5.5 + 9.45 = 14.95 ft
O
< 3.5V
T T
3.5V = 3.5 x 5.5 = 19.25 ft
T
+ V < 24.75 feet
T T