Top Or Rear Exit Vertical Termination - Napoleon Vittoria GD19N Installation And Operating Instructions Manual
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2.10 TOP OR REAR EXIT VERTICAL TERMINATION
Simple venting configurations.
For vent configurations requiring one or more 90° elbows (top exit) or one 90° elbow (rear exit),
the following formulas apply:
Formula 1: H
< V
T
Formula 2: H
+ V
T
Example 6:
V
= 3 FT
1
V
= 6 FT
2
V
= 8 FT
3
V
= V
+ V
+ V
= 3 + 6 + 8 = 17 FT
T
1
2
3
H
= 2 FT
1
H
= 2.5 FT
2
H
= H
+ H
= 2 + 2.5 = 4.5 FT
R
1
2
H
= .03 (four 90° elbows - 90°)
O
= .03 (360° - 90°) = 8.1 FT
H
= H
+ H
= 4.5 + 8.1 = 12.6 FT
T
R
O
H
+ V
= 12.6 + 17 = 29.6 FT
T
T
Formula 1:
Formula 2:
Since both formulas are met, this vent configuration is acceptable.
T
< 35 feet
T
H
< 3.5 V
T
T
12.6 < 17
H
+ V
< 35 FT
T
T
29.6 < 35
(H
) < (V
)
T
T
See graph to determine the required vertical rise V
required horizontal run H
40
35
30
REQUIRED
VERTICAL
20
17.5
RISE IN
FEET V
T
10
3
0
HORIZONTAL VENT RUN PLUS OFFSET IN FEET H
The shaded area within the lines represents acceptable
90°
V
1
.
T
5
10
15
17.5
values for H
and H
T
T
90°
H
2
V
H
2
1
90°
18.4
W415-0825 / 07.06.09
19
for the
T
20
T
V
3
90°
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