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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
combustible materials.
NOTE: Always take into consideration the ef-
fect the prevailing wind direction or other wind cur-
rents will cause with flyash and lor smoke when plac-
ing the termination.
In addition, the following must be observed:
A. The clearance above grade must be a mirii-
mum of 18".l
6.
The clearance to a window or door that may
be opened must be a minimum of 48" to the side,
48" below the windowldoor, and 12" above the win-
d o ~ l d o o r . ~
( 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 dis-
tance 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. Avent must not be installed within 3feet (90
cm) above a gas meterlregulator assembly when
measured from the horizontal center-line of the regu-
1ator.I
I. The clearance to service regulator vent outlet
must be a minimum of 6 feet1
J. The clearance to a non-mechanical air sup-
ply inlet to the building or the combustion air inlet to
any other appliance must be a minimum of 48'l.l
K. The clearance to a mechanical air supply
inlet must be a minimum of 10 feet.I
(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.Iw2
M. The clearance under a veranda, porch, deck
or balcony must be a minimum of 12 i n c h e ~ . ~ . ~
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 3 6
radius continues to grade or a minimum of 7 feet
below the outlet.
ICertain Canadian and or Local codes or regu-
lations may require different clearances.
2Avent shall not terminate directly above a side-
walk or paved driveway which is located between
two single family dwellings and serves both dwell-
ings.
=Only permitted if veranda, porch, deck, or bal-
cony 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 CANICSA-B365.
(if in Canada)
=Vent terminal
7
0
= Air supply inlet
=
Area where terminal is not permitted
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