Vent Termination
Minimum Venting Requirements
Allowable Vent Configurations for Horizontal Vent Termination
40'
38 ½'
(462")
35'
30'
25'
V
20'
15'
10'
5'
4'
(48")
0°
Base of
1 ½'
air collar
4 ⁄ '
(18")
(24")
0°
31
1-6 elbow zone
1-5 elbow zone
5'
10'
H
Horizontal Run (H)
1-4 elbow zone
1-3 elbow zone
1-2 elbow zone
1 elbow zone
15'
20'
V+H ≤ 40 ft.
H ≤ 20 ft.
V + H are measured from
the centre of the vent elbows.
Elbows are considered as 90°.
Two 45° elbows = One 90° elbow.
25'
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