Page 32
Installation Instructions and Owner’s Manual - L48
ENGLISH
v
X
A
J
B
B
C
B
L
B
B
B
I
A
K
G
VENT TERMINAL
V
AIR SUPPLY INLET
X
AREA WHERE TERMINAL IS NOT PERMITTED
V
V
V
V
V
V
V
V
F
v
D
E
FIXED
CLOSED
FIXED
CLOSED
OPERABLE
OPERABLE
M
H
X
DESCRIPTION
CANADA
2
UNITED STATES
3
A
Clearance above grade,
veranda, porch, deck, or
balcony
12 in (30 cm)
12 in (30 cm)
B
Clearance to window or door
that may be open
6 in (15 cm) for appliances ≤ 10,000 Btuh (3
kW), 12 in (30 cm) for appliances > 10,000
Btuh (3 kW) and ≤ 100,000 Btuh (30 kW), 36 in
(91 cm) for appliances > 100,000 Btuh (30 kW)
6 in (15 cm) for appliances ≤ 10,000 Btuh
(3 kW), 9 in (23 cm) for appliances > 10,000
Btuh (3 kW) and ≤ 50,000 Btuh (15 kW), 12 in
(30 cm) for appliances > 50,000 Btuh (15 kW)
C
Clearance to permanently
closed window
12 in (30 cm)
12 in (30 cm)
D
Vertical clearance ventilated
soffit located above the
terminal within a clearance to
permanently closed window
24 in (61 cm)
24 in (61 cm)
E
Clearances to unventilated soffit
12 in (30 cm)
12 in (30 cm)
F
Clearance to outside corner
6 in (15 cm)
6 in (15 cm)
G
Clearance to inside corner
9 in (23 cm)
9 in (23 cm)
H
Clearance to each side of
center line extended above
meter/regulator assembly
3 ft (91 cm) within a height 15 ft (4.5 m) above
the meter/regulator assembly
3 ft (91 cm)
I
Clearance to service regulator
vent outlet
3 ft (91 cm)
6 ft (1.83 m)
J
Clearance to nonmechanical air
supply inlet to building or the
combustion air inlet to any other
appliance
6 in (15 cm) for appliances ≤ 10,000 Btuh (3
kW), 12 in (30 cm) for appliances > 10,000
Btuh (3 kW) and ≤ 100,000 Btuh (30 kW), 36 in
(91 cm) for appliances > 100,000 Btuh (30 kW)
6 in (15 cm) for appliances ≤ 10,000 Btuh
(3 kW), 9 in (23 cm) for appliances > 10,000
Btuh (3 kW) and ≤ 50,000 Btuh (15 kW), 12 in
(30 cm) for appliances > 50,000 Btuh (15 kW)
K
Clearance to a mechanical air
supply inlet
6 ft (1.83 m)
3 ft (91 cm) above if within 10 ft (3 m) hori-
zontally
L
Clearance above paved
sidewalk or paved drive- way
located on public property
7 ft (2.13 m)
4
7 ft (2.13 m)
4
M
Clearance under veranda, porch
deck, or balcony
12 in (30 cm)
5
12 in (30 cm)
2
In accordance with the current CSA B149.1, Natural Gas and Propane Installation Code
3
In Accordance with the current ANSI Z223.1/NFPA 54, National Fuel Gas Code
4
A vent shall not terminate directly above a sidewalk or paved driveway that is located between two single family dwellings and serves both dwellings.
5
Permitted only if veranda, porch, deck, or balcony is fully open on a minimum of two sides beneath the floor.
