13
130112_Rev 2 GF 160 DV 2/22
Figure 6.10. 36” Snorkel termination and mantle clearance.
2 FT. MAX. HORIZONTAL RUN (A) TO SNORKEL TERMINATION
Figure 6.11. Vent Terminal Clearances, Canada and United States
Horizontal Termination Clearance Requirements
Figure 6.11.
Termination Clearance to
overhangs.
Canadian Installations
1
U.S. Installations
2
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 opened
12 in. (30 cm)
9 in. (23 cm) We recommend 12 in. to prevent
condensation on a window.
C
Clearance to permanently closed window
12 in. (30 cm)
9 in. (23 cm) We recommend 12 in. to prevent
condensation on a window.
D
Vertical clearance to ventilated soffit located
above the terminal within a horizontal distance of
2 ft (60 cm) from the center line of the terminal
18 in. (46 cm)
18 in. (46 cm)
E
Clearance to unventilated soffit
12 in. (46 cm)
12 in. (46 cm)
F
Clearance to outside corner
12 in. (46 cm)
9 in. (23 cm) We strongly recommend 12 in.
particularly where strong winds prevail.
G
Clearance to inside corner
12 in. (46 cm)
9 in. (23 cm) We strongly recommend 12 in.
particularly where strong winds prevail.
H
Clearance to each side of center line extended
above a gas meter or regulator
3 ft. (91 cm) within a height 15 ft. above the
meter/regulator assembly
*
I
Clearance to service regulator vent outlet
3 ft. (91 cm)
*
J
Clearance to nonmechanical 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 ft. (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 ft. (2.13 m)
3
*
M
Clearance under veranda, porch, deck, or balcony
12 in. (30 cm)
4
12 in. (30 cm)
4
N
Clearance to propane tank relief valve and filler
connection
5 ft. (1.52 m)
5
/ 10 ft. (3.05 m)
6
5 ft. (1.52 m)
5
/ 10 ft. (3.05 m)
6
1) In accordance with the current CSA B149.1, Natural Gas and Propane Installa-
tion Code.
2) In accordance with ANSI Z223.1/NFPA 54, National Fuel Gas Code
*
For clearances not specified in ANSI Z223.1/NFPA 54 or CSA B149.1, the
clearance will be in accordance with local installation codes and the require-
ments of the gas supplier.
3) A vent shall not terminate directly above a sidewalk or driveway which is located
between two single family dwellings and serves both dwellings.
4) Permitted only if veranda, porch, deck, or balcony is fully open on a minimum of
two sides beneath the floor.
5) Minimum clearance to tanks not filled on site.
6) Minimum clearance to tanks filled on site from bulk truck.
