minimum venting requirements - natural gas
EN
3.4
vertical termination
40'
30'
20'
15'
10'
6'
5'
0'
Base of
air collar
0'
22
W415-1710 / B / 08.17.18
ALL APPLIANCES
(NATURAL GAS ONLY)
V+H ≤ 40 ft. (For longer vent runs,
a power vent is required).
H ≤ 20 ft.
V + H are measured from the
0 elbow zone
centre of vent elbows. Elbows are
considered as 90º.
Two 45º elbows = One 90º elbow.
5'
10'
note:
A 6' (1.83m) minimum vertical rise is considered the minimum practical dimension for
the specific appliance enclosure and a minimal building structure. However, a greater
minimum vertical rise may be needed to suit the specific application constraints or
local codes and / or regulatory requirements.
2-7 elbow zone
2-6 elbow zone
2-5 elbow zone
2-4 elbow zone
2-3 elbow zone
15'
2 elbow zone
20'