VC Series Manual
2
7
[1]
A vent shall not terminate directly above a sidewalk or paved driveway that is
located between two single family dwellings and serves both dwellings.
[2]
Permitted only if veranda, porch, deck, or balcony is fully open on a minimum of
two sides beneath the floor.
For clearances not specified in
ANSI Z223.1/NFPA 54
, clearances are in
accordance with local installation codes and the requirements of the gas supplier.
Clearance to opposite wall is 24 inches (60 cm).
For indoor models, you must install a vent termination to bring in combustion air and expel exhaust.
Direct Vent (Indoor Unit)
Other than direct vent (Outdoor unit)
Ref
Description
Canadian Installations
(CSA B149.1)
US Installations
(ANSI Z223.1 / NFPA 54)
Canadian Installations
(CSA B149.1)
US Installations
(ANSI Z223.1 / NFPA 54)
A
Clearance above grade, veranda, porch, deck, or balcony
12 inches (30 cm)
12 inches (30 cm)
12 inches (30 cm)
12 inches (30 cm)
B
Clearance to window or door that may be opened
36 inches (91 cm)
12 inches (30 cm)
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)
4 ft (1.2 m) below or to
side of opening; 1 ft (300
mm) above opening
C
Clearance to permanently closed window
*
*
*
*
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
*
*
*
*
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
*
*
*
*
I
Clearance to service regulator vent outlet
Above a regulator
within 3 ft (91 cm)
horizontally of the
vertical center line of
the regulator vent
outlet to a maximum
vertical distance of 15
ft (4.5 m)
*
Above a regulator within 3 ft (91 cm)
horizontally of the vertical center line of the
regulator vent outlet to a maximum vertical
distance of 15 ft (4.5 m)
*
J
Clearance to nonmechanical air supply inlet to building or
the combustion air inlet to any other appliance
36 inches (91 cm)
12 inches (30 cm)
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)
4 ft (1.2 m) below or to
side of opening; 1 ft (300
mm) above opening
K
Clearance to a mechanical air supply inlet
6 ft (1.83 m)
3 ft (91 cm) above if
within 10 ft (3 m)
horizontally
6 ft (1.83 m)
3 ft (91 cm) above if within
10 feet (3 m) horizontally
L
Clearance above paved sidewalk or paved driveway
located on public property
7 ft (2.13 m)
*
7 ft (2.13 m) [1]
7 ft. (2.13 m)
M
Clearance under veranda, porch, deck, or balcony
12 inches (30 cm)
*
12 inches (30 cm) [2]
*
Terminal Clearances
AIR SUPPLY INLET
VENT TERMINAL
AREA WHERE TERMINAL IS
NOT PERMITTTED
X
V
SNOW
TERMINATION
Clearance in
Ref. A also
applies to
anticipated
snow line
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