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General Installation Information
Vent termination location requirements (for installations in Canada)
The vent must be installed observing
local regulations in addition to National
Codes, CAN/CSA-B149.1 or 2.
A vent must NOT terminate...
1. ....directly above a paved sidewalk
or paved driveway which is located
between two single-family dwellings
and serves both dwellings.
2. ....less than 7 ft./2.13 m above a
paved sidewalk or a paved driveway
located on public property.
3. ....within 6 ft./1.83 m of a
mechanical air supply inlet
building (dryer vents, non-sealed
combustion furnace and hot water
heater vents are considered to be
mechanical air inlets).
4. ....above a meter/regulator assembly
within 3 ft./0.9 m horizontally of the
vertical centerline of the regulator
vent outlet and to a maximum
vertical distance of 15 ft./4.5 m.
5. ....within 3 ft./0.9 m of any gas
service regulator vent outlet.
*1
Including heat recovery units.
(continued)
6. ....less than 1 ft./0.3 m above grade
level or anticipated snow level
(consult local building authorities or
local weather office). Locate the
vent termination in such a way that
it cannot be blocked by snow.
7. ....within the following distances of
a window or door which can be
opened in any building, any
non-mechanical air supply inlet to
any building or the combustion air
inlet of any other appliance:
H 1 ft./0.3 m for inputs up to and
*1
to any
including 100 000 Btu/h/30 kW
(applicable only to boiler models
WB2-24C/24).
H 3 ft./0.9 m for input exceeding
100 000 Btu/h/30 kW (applicable to
boiler models WB2-32 and up).
8. ....underneath a veranda, porch or
deck, unless
H the veranda, porch, or deck is fully
open on a minimum of two sides
beneath the floor, and
H the distance between the top of
the vent termination and the
underside of the veranda, porch, or
deck is greater than 1 ft./0.3 m.
Single Wall Venting (Room Air Dependent)
9. ....in areas where condensation may
cause problems, such as above
planters, patios, or adjacent to
windows where flue gases may
cause fogging.
10. ....within 3 ft./0.9 m to the
property line (advisable, not
mandatory; please check with local
building authorities and municipal
bylaws).
11. ....at a location where ice
formation on the ground can present
a hazard.
12. ....so that the flue gases are
directed toward brickwork, siding, or
other construction, in such a manner
that may cause damage from heat or
condensate from the flue gases.
13. ....where discharging hot flue
gases may cause property damage
or personal injury.
14. ....within 3 ft./0.9 m from an
inside corner of outside walls.
61
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