Horizontal Vent Run Plus Offset In Feet Ht; See Graph To Determine The Required Vertical Rise - Napoleon The Dream BGD90NT Installation And Operation Instructions Manual
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TOP EXIT / HORIZONTAL TERMINATION
when (H
) > (V
)
T
T
Simple venting confi guration (only one 90° elbow)
FIGURE 6
See graph to determine the
required vertical rise V
for the
T
required horizontal run H
.
T
REQUIRED
VERTICAL
RISE IN
INCHES
V
T
HORIZONTAL VENT RUN PLUS OFFSET 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 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:
V
1
V
= V
= 6 ft
1
T
H
= 3 ft
1
H
= 5 ft
2
H
= H
+ H
= 3 + 5 = 8 ft
R
1
2
H
= .03(two 90° elbows - 90°) = .03(180° - 90°) = 2.7 ft
O
H
= H
+ H
= 8 + 2.7 = 10.7 ft
T
R
O
H
+ V
= 10.7 + 6 =16.7
T
T
Formula 1:
H
< 4.2 V
T
4.2 V
10.7 < 25.2
Formula 2:
H
+ V
< 24.75 feet
T
T
16.7 < 24.75
Since both formulas are met, this vent confi guration is ac-
ceptable.
H
1
H
90°
FIGURE 7
T
= 4.2 x 6 = 25.2 ft
T
Example 3:
V
1
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 - 90°) = .03(360° - 90°) = 8.1 ft
O
H
= H
+ H
T
R
H
+ V
= 13.6 + 5.5 = 19.1 ft
T
T
Formula 1: H
H
T
T
13.6 < 23.1
Formula 2: H
T
19.1 < 24.75
Since both formulas are met, this vent confi guration is
acceptable.
2
90°
H
1
H
2
90°
FIGURE 8
= 4 + 1.5 = 5.5 ft
2
+ H
+ H
= 2 + 1 + 1 + 1. 5 = 5.5 ft
2
3
4
= 5.5 + 8.1 = 13.6 ft
O
< 4.2 V
T
4.2 V
= 4.2 x 5.5 = 23.1 ft
T
+ V
< 24.75 feet
T
W415-0614_05.15.07
7
H
4
V
2
H
3
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