Dunkirk DCBF-125 - Page 22

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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.
INSIDE CORNER
DETAIL
G
V
H
D
A
E
B
L
C
B
V
B
Fixed
Closed
V
I
V
F
V
Fixed
Closed
Operable
Operable
M
V
B
V
K
J
B
V
VENT TERMINAL
AIR SUPPLY INLET
AREA WHERE TERMINAL IS
NOT PERMITTED
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) †
M
Clearance under veranda, porch, deck or balcony *12" (305 mm) ‡ 12" (305 mm)‡
† 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

and these installation instructions.
‡ Permitted only if veranda, porch, deck or balcony is fully open on a

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
240012564 REV A, [05/15/2019]