Napoleon BGD36CFGN Installation And Operating Instructions Manual page 14

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14
BGD36CF(G) TOP OR REAR EXIT VERTICAL TERMINATION
when (H
) < (V
)
T
T
Simple venting confi guration (only two
90° elbows)
FIGURE 29
REQUIRED
VERTICAL
RISE IN
FEET V
T
HORIZONTAL VENT RUN PLUS
OFFSET IN FEET H
The shaded area within the lines represents acceptable values
for H
and V
.
T
T
See graph to determine the required vertical rise V
horizontal run H
T
For vent confi gurations requiring more than zero 90° elbow (top exit)
or one 90° elbow (rear exit), the following formulas apply:
Formula 1: H
< V
T
T
Formula 2: H
+ V
< 40 feet
T
T
Example 6:
FIGURE 30
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 (three 90° elbows - 90°)
O
=.03(90 + 90 + 90 - 90) = 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.
W415-0661 / 12.07.07
NorthlineExpress.com
T
for the required
T
90°
H
H
V
1
1
90°
T
< 40 feet
T
http://www.northlineexpress.com
when (H
) > (V
)
T
T
Simple venting confi gurations
FIGURE 31
See graph to determine
the required vertical rise V
for the required horizontal
run H
.
T
MAXIMUM
VERTICAL
R I S E
I N
FEET
V
T
HORIZONTAL VENT RUN PLUS OFFSET IN
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 (top exit)
or one 90° elbow (rear exit), the following formulas apply:
Formula 1: H
< 3V
T
Formula 2: H
+ V
T
Example 7:
90°
V
V
2
2
V
= 2 ft
90°
1
V
= 1 ft
2
V
= 1.5 ft
3
V
= V
+ V
+ V
= 2 + 1 + 1.5 = 4.5 ft
T
1
2
3
H
= 6 ft
1
H
= 2 ft
2
H
= H
+ H
= 6 + 2 = 8 ft
R
1
2
H
= .03 (four 90° elbows - 90°)
O
= .03(90 + 90 + 90 + 90 - 90) = 8.1 ft
H
= H
+ H
= 8 + 8.1 = 16.1 ft
T
R
O
H
+ V
= 16.1 + 4.5 = 20.6 ft
T
T
Formula 1:
H
< 3V
T
Since this formula is not met, this vent confi guration is unac-
ceptable.
Formula 2:
H
+ V
T
20.6 < 40
Since only formula 2 is met, this vent confi guration is unacceptable
and a new fi replace location or vent confi guration will need to be
established to satisfy both formulas.
T
FEET H
T
T
< 40 feet
T
90°
H
V
1
2
2
H
1
90°
FIGURE 32
T
3V
= 3 x 4.5 = 13.5 ft
T
< 40 feet
T
Toll-Free 1-866-667-8454
V
3
90°

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