Use & Care Manual

Horizontal Vent Terminal Location
A vent shall not terminate:
l where it may cause hazardous frost or ice accumulations on adjacent
property surfaces;
l less than 7 ft. (2.1 m) above a paved sidewalk or a paved driveway that is
located on public property;
l within 6 ft. (1.8 m) of a mechanical air-supply inlet to any building;
l above a regulator within 3 ft. (900 mm) horizontally of the vertical
centerline of the regulator vent outlet to a maximum vertical distance of 15
ft. (4.5 m);
l except as required by CAN/CSA B149.1 Natural gas and Propane
Installation Code , any distance less than that of any gas pressure regulator
vent outlet as detailed;
l less than 1 ft. (300 mm) above average snowfall or grade level, reference
CAN/CSA B149.1 Natural gas and Propane Installation Code;
l within 12 in. (300 mm) of a window or door that can be opened in any
building, of any nonmechanical air-supply inlet to any building, or of the
combustion air inlet of any other appliance;
l underneath a veranda, porch, or deck unless:
- the veranda, porch, or deck is fully open on a minimum of two
sides beneath the floor; and
- the distance between the top of the vent termination and the
underside of the veranda, porch, or deck is greater than 1 ft. (300
mm).
(30 cm)
Soffit vents
(
91 cm)
18 in. (45cm)
Electric/Gas
service meter
Minimum
6 ft. (1.8 m)
Inside
corner
Mechanical
Air Supply
1 ft. (30 cm)
Above grade
Non-Mechanical
Air Supply
1 ft.
3 ft.
1 ft. (30 cm)
(30 cm)
1 ft.
(30 cm)
1 ft.
1 ft. (30 cm)
Minimum
Vent Terminal
Combustion
Air-Inlet Terminal
(30 cm)
1 ft.
NOTICE: Follow the vent system manufacturer's installation instructions for proper installation of the
vent system and combustion air-inlet systems.
Vent Terminal Location Considerations
DO NOT install the vent terminal under any patio or deck.
To help prevent moisture from freezing on walls and under eaves, do not
locate the vent terminal on the side of a building with prevailing winter
winds.
When terminating the vent and combustion air-inlet pipes through brick
or masonry surfaces, the installation of a rust resistant sheet metal
backing plates behind the vent and combustion air-inlet terminals are
recommended.
DO NOT locate the vent terminal too close to shrubbery, as flue gasses
may damage them.
Caulk all cracks, seams and joints within 6 ft. (1.83 m) of the vent and
combustion air-inlet terminals.
Insulate vent pipe exposed to cold conditions (attics, crawl spaces, etc.)
with inflammable material to help prevent moisture from accumulating
in the vent pipe.
Support horizontal sections of the vent and combustion air-inlet
pipe every 4 ft. (1.22 m). DO NOT rigidly secure the vent system.
Provisions must be made to allow for expansion and contraction of the
vent system.
DO NOT install the vent and combustion air-inlet terminals less than
1 ft. (30 cm) above grade or average snowfall whichever is greater.
Permanently seal annular openings around the vent and combustion air-
inlet system penetrations using approved materials to prevent entry of
combustion products into the building.
If soffit vent is too close,
block off and install new vent
at another location
Inside
corner
Caulk
Caulk
12 in. (30.5 cm)
min. above grade or
anticipated snow level
6 ft. (1.8 m) Caulk zone
or to edge of window etc.,
starting within 6 ft. (1.8 m)
Rising moisture will
collect under eves
4 ft.'
(1.22 m)
Vent
Combustion
Air-Inlet
WARNING: Moisture in the flue gas will condense as it
leaves the vent terminal. In cold weather this condensate can
freeze on the exterior wall, under the eaves and on
surrounding objects. Some discoloration to the exterior of the
building is to be expected. However, improper location or
installation can result in severe damage to the structure or
exterior finish of the building
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