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TOP VENT - HORIZONTAL TERMINATION
One 90° Elbow
A
TO BOTTOM
OF UNIT
B
INSTALLED
VERTICALLY
1’
MINIMUM
EXAMPLE VENT RUNS
INITIAL PIPE
LENGTH
A (Vertical)
B (Horizontal)
MAXIMUM
(Dimensions in inches)
12
55
Natural - 24
Propane - 12
24
67
42
36
79
108 (9ft)
48
91
168 (14ft)
Figure 45
NOTE:
Pipe straps must be used every 2 feet to secure venting.
Two 45° Elbows
Installation requirements to replace the first 90° elbow with two
45° elbows:
B
A
EXAMPLE VENT RUNS
INITIAL PIPE
LENGTH
A (Vertical)
B (Horizontal)
MAXIMUM
(Dimensions in inches)
12
66
72
24
80
132 (11ft)
36
91
204 (17ft)
48
103
240 (20ft)
Figure 46
Two 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)
B (Horizontal)
MAXIMUM
(Dimensions in inches)
12
55
0’
24
67
6
36
79
72 (6ft)
48
91
132 (11ft)
Figure 47
Three 90° Elbows
1’
MININUM
B
INSTALLED
VERTICALLY
INSTALLED
VERTICALLY
A
TO BOTTOM
OF UNIT
EXAMPLE VENT RUNS
INITIAL PIPE
LENGTH
A (Vertical)
B (Horizontal)
MAXIMUM
(Dimensions in inches)
12
55
18
24
67
24 (2ft)
36
79
90 (7ft, 6in)
48
91
114 (9ft, 6in)
Figure 48
