Requirements for Terminating the Venting
WARNING: Venting terminals must not be recessed
into a wall or siding.
NOTE: Only PL vent pipe wall pass-throughs
and fire stops should be used when venting through
combustible materials.
NOTE: Always take into consideration the effect the prevailing wind direction or
other wind currents will cause with fly ash and /or smoke when placing the
termination.
In addition, the following must be observed:
A. The clearance above grade must be a minimum of 18".
B. The clearance to a window or door that may be opened must be a minimum of
48". ( with outside air installed, 18" )
C. A 12" clearance to a permanently closed window is recommended to prevent
condensation on the window.
D. The vertical clearance to a ventilated soffit located above the terminal
within a horizontal distance of 2 feet (60 cm) from the center-line of the
terminal must be a minimum of 18".
E. The clearance to an unventilated soffit must be a minimum of 12".
F. The clearance to an outside corner is 11" from center of pipe.
G. The clearance to an inside corner is 12".
H. A vent must not be installed within 3 feet (90
cm) above a meter/regulator assembly when measured
from the horizontal center-line of the regulator.
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I. The clearance to service regulator vent outlet
must be a minimum of 6 feet.
J. The clearance to a non-mechanical air supply
inlet to the building or the combustion air inlet to
any other appliance must be a minimum of 48".
K. The clearance to a mechanical air supply
inlet must be a minimum of 10 feet.
(with outside air installed, 6 feet )
L. The clearance above a paved sidewalk or a paved driveway located on public
property must be a
minimum of 7 feet.
M. The clearance under a veranda, porch, deck
or balcony must be a minimum of 12 inches.
NOTE: The clearance to vegetation and other
exterior combustibles such as mulch is 36" as measured
from the center of the outlet or cap. This 36" radius continues to grade or a
minimum of 7 feet below the outlet.
Certain Canadian and or Local codes or regulations
may require different clearances.
A vent shall not terminate directly above a sidewalk
or paved driveway which is located between
two single family dwellings and serves both dwellings.
Only permitted if veranda, porch, deck, or balcony is fully open on a minimum of
2 sides beneath the floor.
NOTE: Where passage through a wall, or
partition of combustible construction is desired,
the installation shall conform to CAN/CSA-B365.
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