ECR International Utica Boilers MAC-115, Installation, Operation & Maintenance Manual, Page: 32 / 138

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FIGURE 5-25 - Flue Terminal Location
All vent pipe and combustion air pipe and fittings shall comply with the following:
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
Vertical Clearance to ventilated soffit located above the terminal within a
horizontal distance of 2 feet (610 mm) from the center line of the terminal
18" (457 mm) 18" (457 mm)
E
Clearance to unventilated soffit 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.
*For clearances not specified in ANSI Z223.1/NFPA 54 or
CSA B149.1, clearance will be in accordance with local
installation codes and the requirements of the gas supplier
and these installation instructions.
Note: Local Codes or Regulations may require different clearances. Flue terminal must be exposed to external air and position must
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
240013354 REV A [07/01/2021]