28
FIGURE 5-25 - Flue Terminal Location
Use only manufacturer approved venting materials or venting materials primer and glue approved to: ULC S636 in Canada, or
UL 1738 in the U.S.
Materials used in the U.S. shall comply with Authority having jurisdiction and in absence of such with: ANSI/ASTM D1785, ANSI/
ASTM F441, ANSI/ASTM F493.
DETAIL
G
NOT
Vent Termination Minimum Clearances
US Installations Canadian Installations
A
Clearance above grade, veranda, porch, deck, or balcony 12" (305 mm) 12" (305 mm)
B
Clearance to window or door that may be opened 12" (305 mm) 3 ft. (0.9 m)
C
Clearance to permanently closed window *12" (305 mm) *12" (305 mm)
D
horizontal distance of 2 feet (610 mm) from the center line of the terminal
18" (457 mm) 18" (457 mm)
E
18" (457 mm) 18" (457 mm)
F
Clearance to outside corner 9" (229 mm) 9" (229 mm)
G
Clearance to inside corner 36" (456 mm) 36" (456 mm)
H
Clearance to each side of center line extended above meter/ regulator
assembly
3 ft. (0.9 m) within a height of
15 ft. (4.5 m) above the meter/
regulator assembly
3 ft. (0.9 m)
I
Clearance to service regulator vent outlet 3 ft. (0.9 m) 3 ft. (0.9 m)
J
Clearance to non-mechanical air supply inlet to building or the combustion
air inlet to any other appliance
12" (305 mm) 3 ft. (0.9 m)
K
Clearance to mechanical air supply inlet *3 ft. (0.9 m) 6 ft. (1.8 m)
L
Clearance above paved sidewalk or paved driveway located on public
property
*7 ft. (2.1 m) 7 ft. (2.1 m) †
† A vent shall not terminate directly above a sidewalk or paved driveway that is
located between two single family dwellings and serves both dwellings.
CSA B149.1, clearance will be in accordance with local
installation codes and the requirements of the gas supplier
and these installation instructions.
Note:
allow the free passage of air across it at all times. In certain weather conditions the terminal may emit a plume of steam. Avoid
positioning terminal where this may cause a nuisance.
5 - COMBUSTION AIR AND VENT PIPING
240013360
REV A [07/01/2021]
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