17
Page
Installation
Installation Manual
-Vent termination clearances-
Canada
USA
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 ANSI Z2231 / NFPA 54 (US) or B1491 (Canada), please use clearances in accor-
dance with local installation codes and the requirements of the gas supplier
INSIDE CORNER DETAIL
V
Gas meter / regulator
V
V
V
V
V
V
V
V
V
X
X
X
Vent terminal
Air supply inlet
Area where is not permitted
G
A
E
D
B
L
C
F
B
B
B
B A
J
OPERABLE
FIXED
CLOSED
B
H
M
K
OPERABLE
FIXED
CLOSED
I
