Napoleon BGD36CFNTR Installation And Operating Instructions Manual page 13
Napoleon fireplaces gas fireplace installation and operating instructions
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BGD36CF(G) REAR EXIT / HORIZONTAL TERMINATION
when (H
) < (V
)
T
T
Simple venting confi guration (only two 90° elbows)
FIGURE 25
See graph to determine the required vertical rise V
horizontal run H
T
REQUIRED VER-
TICAL RISE IN
FEET
V
T
HORIZONTAL VENT RUN PLUS OFF-
The shaded area within the lines represents acceptable values
for H
and V
.
T
T
For vent confi gurations requiring more than two 90° elbows the fol-
lowing formulas apply:
Formula 1: H
< V
T
T
Formula 2: H
+ V
< 40 feet
T
T
H
1
Example 4:
V
= 9 ft
1
V
= 6 ft
2
V
= V
+ V
= 9 + 6 = 15 ft
T
1
2
H
= 3 ft
1
H
= 2 ft
2
H
= 1.5 ft
3
H
= H
+ H
+ H
= 3 + 2 + 1.5 = 6.5 ft
R
1
2
3
H
= .03 (four 90° elbows - 90°)
O
= .03(90 + 90 + 90 + 90 - 90) = 8.1 ft
H
= H
+ H
= 6.5 + 8.1 = 14.6 ft
T
R
O
H
+ V
= 14.6 + 15 = 29.6 ft
T
T
Formula 1:
H
< V
T
T
14.6 < 15
Formula 2:
H
+ V
< 40 feet
T
T
29.6 < 40
Since both formulas are met, this vent confi guration is ac-
ceptable.
for the required
T
SETS IN FEET H
T
90°
H
3
V
90°
2
FIGURE 26
H
2
90°
V
1
90°
when (H
) > (V
)
T
T
Simple venting
confi guration (only
two 90° elbows)
FIGURE 27
See graph to determine the required vertical rise V
horizontal run H
T
REQUIRED VERTICAL
V
RISE IN INCHES
T
The shaded area within the lines represents acceptable
values for H
and V
.
T
T
For vent confi gurations requiring more than two 90° elbows the fol-
lowing formulas apply:
Formula 1: H
< 3.5V
T
T
Formula 2: H
+ V
< 24.75 feet
T
T
Example 5:
H
1
V
=4 ft
1
V
=1.5 ft
2
V
=V
+ V
= 4 + 1.5 = 5.5 ft
T
1
2
H
=2 ft
1
H
=1 ft
2
H
=1 ft
3
H
=1.5 ft
4
H
=H
+ H
+ H
+ H
= 2 + 1 + 1 + 1.5 = 5.5 ft
R
1
2
3
4
H
=.03 (four 90° elbows + one 45° elbow - 90°)
O
=.03(90 + 90 + 90 + 90 + 45 - 90) = 9.45 ft
H
=H
+ H
= 5.5 + 9.45 = 14.95 ft
T
R
O
H
+ V
= 14.95 + 5.5 = 20.45 ft
T
T
Formula 1:
H
< 3.5V
T
T
3.5V
T
14.95 < 19.25
Formula 2:
H
+ V
< 24.75 feet
T
T
20.45 < 24.75
Since both formulas are met, this vent confi guration is ac-
ceptable.
for the required
T
HORIZONTAL VENT RUN
PLUS OFFSETS IN FEET H
90°
H
4
90°
V
2
45°
H
90°
2
H
V
3
1
FIGURE 28
90°
= 3.5 x 5.5 = 19.25 ft
W415-0661 / C / 02.20.08
13
T
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