Napoleon BGD36CFGN Installation And Operating Instructions Manual page 17
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when (H
) < (V
)
T
T
Simple venting confi gurations
See graph to determine the required vertical
rise V
for the required horizontal run H
T
MAXIMUM
VERTICAL
RISE IN FEET
V
T
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 one 90°
elbow the following formulas apply:
Formula 1: HT < VT
Formula 2: HT + VT < 40 feet
NorthlineExpress.com
BGD42CF VERTICAL TERMINATION
FIGURE 38
.
T
HORIZONTAL VENT
RUN PLUS OFFSET IN
FEET H
T
http://www.northlineexpress.com
Example 3:
FIGURE 39
45°
V
= 5 ft
1
V
= 10 ft
2
V
= V
+ V
= 5 + 10 = 15 ft
T
1
2
H
= 3 ft
1
H
= 2.5 ft
2
H
= H
+ H
= 3 + 2.5 = 5.5 ft
R
1
2
H
= .03 (one 45° elbow + three 90° elbows - 135°)
O
= .03 (45 + 90 + 90 +90 - 135) = 5.4 ft
H
= H
+ H
= 5.5 + 5.4 = 10.9 ft
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
T
25.9 < 40
Since both formulas are met, this vent confi guration is ac-
ceptable.
90°
H
2
V
1
45°
H
90°
1
T
< 40 feet
T
W415-0661 / 12.07.07
Toll-Free 1-866-667-8454
17
V
2
90°
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