13
Vent Termination Clearances
Canada U.S.A
Direct vent and other
than Direct Vent
Direct
vent
Other than
Direct Vent
A Clearance above grade, veranda, porch, deck, or balcony. 1 foot 1 foot 1 foot
B Clearance to window or door that may be opened 3 feet 1 foot
4 feet from below or
side opening. 1 foot
from above opening.
C Clearance to permanently closed window * * *
D
Vertical clearance to ventilated soffit located above the
vent terminator within a horizontal distance of 2 feet
(61cm) from the center line of the terminator.
***
E Clearance to unventilated soffit * * *
F Clearance to outside corner * * *
G Clearance to inside corner * * *
H
Clearance to each side of center line extended above
meter/regulator assembly
3 feet * *
I Clearance to service regulator vent outlet. 3 feet * *
J
Clearance to non-mechanical air supply inlet to building or
the combustion air inlet to any other application
3 feet 1 foot
4 feet from below or
side opening. 1 foot
from above opening.
K Clearance to mechanical air supply inlet. 6 feet 3 feet 3 feet
L
Clearance above paved sidewalk or paved driveway
located on public property.
7 feet * 7 feet
M Clearance under veranda, porch deck, or balcony. 1 foot * *
* For clearances not specified in CSA B149.1 Natural Gas and Propane Installation Code, please use clearances in
accordance with local installation codes and the requirement of the gas supplier.
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