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TOP VENT - VERTICAL TERMINATION
No Elbows
DIMENSIONS (in inches)
MINIMUM
MAXIMUM
120 (10ft)
480 (40ft)
Figure 49
Two 90° Elbows
EXAMPLE VENT RUNS
INITIAL PIPE
LENGTH
A (Vertical)
MINIMUM
B (Horizontal)
MAXIMUM
(Dimensions in inches)
12
120 (10ft)
222 (18ft, 6in)
24
120 (10ft)
222 (18ft, 6in)
36
120 (10ft)
222 (18ft, 6in)
48
120 (10ft)
222 (18ft, 6in)
*Maximum horizontal run is 100% of vertical, but cannot exceed
20 feet.
Figure 50
Three 90° Elbows
NOTE:
Subtract 3 feet from the total horizontal measurement for
each 90° elbow installed horizontally. Subtract 1-1/2 feet from
the total horizontal measurement for each 45° elbow installed
horizontally.
EXAMPLE VENT RUNS
INITIAL PIPE
LENGTH
A (Vertical)
MINIMUM
B (Horizontal)
MAXIMUM
(Dimensions in inches)
12
120 (10ft)
186 (15ft, 6in)
24
120 (10ft)
186 (15ft, 6in)
36
120 (10ft)
186 (15ft, 6in)
48
120 (10ft)
186 (15ft, 6in)
*Maximum horizontal run is 100% of vertical, but cannot exceed
17 feet.
Figure 51