TOP VENT - VERTICAL TERMINATION
NO ELBOWS
Minimum
(Dimensions In Inches)
120 (10ft)
TWO 90° ELBOWS
EXAMPLE VENT RUNS
Initial Pipe
A (Vertical)
Length
(Dimensions In Inches)
12
24
36
48
*Maximum horizontal run is 100% of vertical, but cannot exceed
20 feet.
41978-1-1220
Maximum
480 (40ft)
Figure 49
B (Horizontal)
Minimum
Maximum
120 (10ft)
222 (18ft, 6in)
120 (10ft)
222 (18ft, 6in)
120 (10ft)
222 (18ft, 6in)
120 (10ft)
222 (18ft, 6in)
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
A (Vertical)
Length
(Dimensions In Inches)
12
24
36
48
*Maximum horizontal run is 100% of vertical, but cannot exceed
17 feet.
B (Horizontal)
Minimum
Maximum
120 (10ft)
186 (15ft, 6in)
120 (10ft)
186 (15ft, 6in)
120 (10ft)
186 (15ft, 6in)
120 (10ft)
186 (15ft, 6in)
Figure 51
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