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TERMINATION LOCATION AND CLEARANCES
Table 2 - Horizontal vent termination clearances for buildings with combustible and noncombustible exteriors
Inside Corner Outside Corner
D
L
V
E
B
V
B
B
Openable Fixed
V
A
J X
B
V
X
AIR SUPPLY INLET
H
See
Table 3
G
V
V
F
Recessed Location
N
P
Q
V
O
F V
C
Fixed
Closed
Openable
B
V TERMINATION CAP
G
G GAS METER
I
M
V K X
RESTRICTED AREA
(TERMINATION PROHIBITED)
G
V
G
V
A
Balcony with No Side Wall
M
V
Balcony with Perpendicular Side Wall
M
V
A
B
Clearance above grade, veranda, porch, desk, or balcony
Clearance to window or door that may be opened
U.S. Installation **
12” (300 mm) **
6” (150 mm) for fireplaces < 10,000 Btu/h (3 kW),
9” (230 mm) for fireplaces > 10,000 Btu/h (3 kW), and < 50,000 Btu/h (15 kW),
12” (300 mm) for fireplaces > 50,000 Btu/h (15 kW) **
9” (229 mm) recommended to prevent window condensation
Canadian Installation *
12” (300 mm) *
6” (150 mm) for fireplaces < 10,000 Btu/h (3 kW),
12” (300 mm) for fireplaces > 10,000 Btu/h (3 kW)
C
Clearance to permanently closed window
D
Vertical clearance to ventilated soffit located above the termination within a horizontal distance of 18” (458 mm)
E
F
G
Clearance to inside corner
H
I
Clearance to unventilated soffit
Clearance to outside corner
Clearance to each inside of center line extended above meter / regulator assembly
Clearance to service regulator vent outlet
J
Clearance to nonmechanical air supply inlet to building or the combustion air inlet to any other fireplace
18” (458 mm)
12” (305 mm)
30” (760 mm) to vinyl soffit
5” (127 mm) minimum
2” (51 mm) minimum
36” (910 mm) within a height of 15 ft above the meter / regulator assembly **
36” (910 mm)**
6” (150 mm) for fireplaces < 10,000 Btu/h (3 kW),
9” (230 mm) for fireplaces > 10,000 Btu/h (3 kW) and < 50,000 Btu/h (15 kW),
12” (300 mm) for fireplaces > 50,000 Btu/h (15 kW)**
36” (910 mm) above if within 10 ft (3 m) horizontally **
84” (2130 mm) ‡
12” (305 mm) recommended to prevent window condensation
18” (458 mm)
12” (305 mm)
30” (760 mm) to vinyl soffit
5” (127 mm) minimum
2” (51 mm) minimum
36” (910 mm) within a height of 15 ft above the meter / regulator assembly *
36” (910 mm)*
6” (150 mm) for fireplaces < 10,000 Btu/h (3 kW),
12” (300 mm) for fireplaces > 10,000 Btu/h (3 kW)
K
Clearance to a mechanical air supply inlet
L
Clearance above paved sidewalk or paved driveway located on public property
M
N
O
Clearance under veranda, porch, deck or balcony
Depth of alcove (maximum)
Clearance to termination (alcove)
12” (300 mm) *‡
72” (1830 mm) **
6” (15.2 mm) **
72” (1830 mm) *
84” (2130 mm) ‡
12” (300 mm) *‡
72” (1830 mm) *
6” (15.2 mm)*
*
**
‡
*‡
P
Width of alcove (minimum)
Q
Clearance to combustible above (alcove)
36” (910 mm) **
18” (457 mm) **
36” (910 mm) *
18” (457 mm) *
In accordance with the current CAN/CGA-B149.1 National Gas And Propane Installation Code
In accordance with the current ANSI Z223.1/NFPA 54 National Fuel Gas Codes
A vent shall not terminate directly above a sidewalk or paved driveway which is located between two single family dwellings and serves both dwellings
Only permitted if veranda, porch, deck, or balcony is fully-open on a minimum two sides beneath the floor
901080-00B SuperiorFireplaces.us.com
17
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