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9
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
re stops should be used when venting through com-
bustible materials.
NOTE: Always take into consideration the effect
the prevailing wind direction or other wind currents
will cause with yash 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”.
1
B. The clearance to a window or door that may be
opened must be a minimum of 48” to the side, 48”
below the window/door, and 12” above the window/
door.
1
C. A 12” clearance to a permanently closed window is
recommended to prevent condensation on the window.
D. The vertical clearance to a ventilated soft 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 soft 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”. If you see
deposits developing on the wall, you may need to extend
this distance to accomodate your installation conditions.
H. A vent must not be installed within 3 feet (90 cm)
above a gas meter/regulator assembly when measured
from the horizontal center-line of the regulator.
1
I. The clearance to service regulator vent outlet must be
a minimum of 6 feet.
1
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”.
1
K. The clearance to a mechanical air supply inlet must
be a minimum of 10 feet.
1
L. The clearance above a paved sidewalk or a paved
driveway located on public property must be a minimum
of 7 feet.
1,2
M. The clearance under a veranda, porch, deck or
balcony must be a minimum of 12 inches.
1,3
(See B. also)
NOTE: The clearance to vegetation and other exte-
rior 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.
1
Certain Canadian and or Local codes or regulations
may require different clearances.
2
A vent shall not terminate directly above a sidewalk
or paved driveway which is located between two
single family dwellings and serves both dwellings.
3
Only permitted if veranda, porch, deck, or balcony is
fully open on a minimum of 2 sides beneath the oor.
= Vent terminal
= Air supply inlet
= Area where terminal is not permitted
Fig. 2
NOTE: Where passage through a wall, or partition of
combustible construction is desired, the installation
shall conform to CAN/CSA-B365. (if in Canada)