EN
W415-1710 / B / 08.17.18
21
minimum venting requirements - natural gas
10’
10’
15’
15’
20’
20’
30’
40’
5’
5’
1-3 elbow zone
H
V
V
1
V
2
H
2
H
1
V
=
V
1
+
V
2
= 8 ft
H
=
H
1
+
H
2
= 10 ft
90°
90°
V
1
V
2
H
1
H
2
V and H are measured from the center of the vent elbows
This example represents a vent that has a maximum of three 90º elbows, a combined horizontal vent length (H ) of
10 feet and a combined vertical vent length (V) of 8 feet.
0’
0’
Base of
air collar
Base of
air collar
Since the vent is located in the dark shaded area, it is within the acceptable vent configuration
4 3/4”
(57”)
(NATURAL GAS ONLY)
