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M
K
I
A
V
G
G
H
A
J
V
G
A
B
C
A
V
V
A
V
B
F
B
L
V
E
V
V
V
D
FIXED
CLOSED
FIXED
CLOSED
OPEN-
ABLE
OPEN-
ABLE
AIR SUPPLY INLET
VENT TERMINAL
GAS METER
AREA WHERE TERMINAL
IS NOT PERMITTED
B
B
Vent Terminal Minimum Clearances
Key
Description
Canadian Installation ¹
US Installation ²
A
Clearances above grade, veranda, porch, deck, or
balcony
12 in (30 cm)
12 in (30 cm)
B
Clearance to window or door that may be opened
12 in (30 cm)
9 in (23 cm)
C
Clearance to permanently closed window
10 in (26 cm)
10 in (26 cm)
D
Vertical clearance to ventilated soffit located above
the terminal within a horizontal distance of 2 feet (61
cm) from the center line of the terminal
16 in. (41 cm)
16 in. (41 cm)
E
Clearance to unventilated soffit
16 in. (41 cm)
16 in. (41 cm)
F
Clearance to outside corner
10 in (26 cm)
10 in (26 cm)
G
Clearance to inside corner
10 in (26 cm)
10 in (26 cm)
H
Clearance to each side of center line extended above
meter/regulator assembly
3 ft (91 cm) within a
height of 15 ft (4.5
m) above the meter/
regulator assembly
3 ft (91 cm) within a
height of 15 ft (4.5
m) above the meter/
regulator assembly
I
Clearance to service regulator vent outlet
3 ft (91 cm)
3 ft (91 cm)
J
Clearance to non-mechanical air supply inlet to
building or the combustion air inlet to any other
appliance
12 in (30 cm)
9 in (23 cm)
K
Clearance to a mechanical air supply inlet
6 feet (1.83 m)
3 ft (91 cm) above
if within 10 ft (3 m)
horizontally
L
Clearance above paved sidewalk or paved driveway
located on public property
7 feet (2.13 m) †
7 feet (2.13 m) †
M
Clearance under veranda, porch, deck, or balcony
16 in. (41 cm) ‡
16 in. (41 cm) ‡
1 In accordance with the current CSA B149.1,Natural Gas and Propane Installation Code
2 In accordance with the current ANSI Z223.1/NFPA 54, National Fuel Gas Code
† A vent shall not terminate directly above a sidewalk or paved driveway that is located between two single family
dwellings and serves both dwellings
‡ Permitted only if veranda, porch, deck, or balcony is fully open on a minimum of two sides beneath the floor
28
100004937
Esprit L44
290421-60