17
venting
requirements for Terminating the
venting
WARNING: Venting terminals must not be re
-
cessed into a wall or siding.
NOTE: Only PL vent pipe wall pass-throughs and
fire 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 flyash 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
(
with outside air installed, 18” below or beside,
and 9" above.)
C. A 12" clearance to a permanently closed win
-
dow is recommended to prevent condensation on the
window.
D. The vertical clearance to a ventilated soffit lo
-
cated 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 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
(
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.
1,2
M. The clearance under a veranda, porch, deck
or balcony must be a minimum of 12 inches.
1,3
NOTE: The clearance to vegetation and other
exterior combustibles such as mulch is 36” as mea-
sured 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 regula
-
tions may require different clearances.
2
A vent shall not terminate directly above a side-
walk or paved driveway which is located between two
single family dwellings and serves both dwellings.
3
Only permitted if veranda, porch, deck, or bal-
cony is fully open on a minimum of 2 sides beneath
the floor.
v
= Vent terminal
NOTE: where passage through a wall, or partition
of combustible construction is desired, the
installation shall conform to CAN/CSA-b365. (if
in Canada)
Summary of Contents for Advance
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