8
U.S. Installations
1
Canadian Installations
2
A
Clearance above grade, veranda, porch, deck, or
balcony
1' (30 cm)
1' (30 cm)
B
Clearance to window or door that may be opened
4' (1.2 m) below or to side of
opening
3' (91 cm)
C
Clearance to permanently closed window
*
*
D
Vertical clearance to ventilated soffit located above the
terminal within a horizontal distance of 2' (61 cm) from
the centerline of the terminal
5' (1.5 m)
*
E
Clearance to unventilated soffit
*
*
F
Clearance to outside corner
*
*
G
Clearance to inside corner
6' (1.83 m)
*
H
Clearance to each side of center line extended above
meter/regulator assembly
*
3' (91 cm) within a height
15' (4.5 m) above the meter/
regulator assembly
I
Clearance to service regulator vent outlet
*
6' (1.83 m)
J
Clearance to non-mechanical air supply inlet to
building or the combustion air inlet to any other
appliance
4' (1.2 m) below or to side of
opening; 1' (30 cm) above
opening
3' (91 cm)
K
Clearance to mechanical air supply inlet
3' (91 cm) above if within
10' (3 m) horizontally
6' (1.83 m)
L
Do not terminate above paved sidewalk or paved
driveway
Slip hazard due to frozen
condensate
Slip hazard due to frozen
condensate
M
Clearance under veranda, porch, deck or balcony
*
1' (30 cm)
t
1
In accordance with the current ANSI Z223.1/NFPA 54 National Fuel Gas Code.
2
In accordance with the current CAN/CSA-B149 Installation Codes.
t
Permitted only if veranda, porch, deck, or balcony is fully open on a minimum of two sides beneath the floor and top of terminal, and underside
of veranda, porch, deck or balcony is greater than 1' (30 cm).
*
Clearances in accordance with local installation codes and the requirements of the gas supplier.
A
INSIDE
CORNER DET
AIL
V = VENT
X = AIR INLET
F10692
V
G
H
A
B
B
V
V
B
B
V
A
J
X
I
M
V
X
K
V
V
B
F
C
OPERABLE
FIXED
CLOSED
FIXED
CLOSED
OPERABLE
Table C. Vent/Air Inlet Termination Clearances
Figure 3. Minimum Clearances from Vent/Air Inlet Terminations – Indoor and Outdoor Installations
Summary of Contents for AVIA 264A
Page 67: ...67 2 H 1 R 1 H 7 S 2 C 3 C 5 S...
Page 68: ...68 1 F 2 F 2 G 1 M 4 M 5 M 6 M 7 M 8 M 10 M 6 G 3 G 4 G...
Page 69: ...69 1 B 2 B 2 F 1 P 3 P 2 P...
Page 70: ...70 1 V 2 V 3 V 11C 11 M OPTIONAL...
Page 71: ...71 14 H 15 H 4 H 12 M 7 H 9 H 7 C 8 C 12 H 13 H 16 H 11 H 10 H 10 C 9 C 8 H 6 H 5 H 3 H...
Page 146: ...67 2 H 1 R 1 H 7 S 2 C 3 C 5 S...
Page 147: ...68 1 F 2 F 2 G 1 M 4 M 5 M 6 M 7 M 8 M 10 M 6 G 3 G 4 G...
Page 148: ...69 1 B 2 B 2 F 1 P 3 P 2 P...
Page 149: ...70 1 V 2 V 3 V 11C 11 M OPTIONAL...
Page 150: ...71 14 H 15 H 4 H 12 M 7 H 9 H 7 C 8 C 12 H 13 H 16 H 11 H 10 H 10 C 9 C 8 H 6 H 5 H 3 H...
