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W415-0434 / C / 03.24.05
REQUIRED
VERTICAL RISE
IN FEET
V
T
HORIZONTAL VENT RUN PLUS OFFSET IN FEET
H
T
The shaded area within the lines represents acceptable
values for H
T
and V
T
.
when (H
T
) < (V
T
)
Simple venting configurations
FIGURE 9
For vent configurations requiring more than zero 90° elbow
(top exit) or one 90° elbow (rear exit), the following formu-
las apply:
Formula 1: H
T
< V
T
Formula 2: H
T
+ V
T
< 40 feet
See graph to determine the required vertical rise V
T
for the
required horizontal run H
T
.
0
5101520
40
10
20
30
3
VERTICAL TERMINATION