3-90-00674R20_08/12
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.
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.
(
)
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.
Certain Canadian and or Local codes or regulations
may require different clearances.
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.
Only permitted if veranda, porch, deck, or balcony is
fully open on a minimum of 2 sides beneath the oor.
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" to the side and
48" below the window/door, and 12" above the
window/door.
(
)
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".
= Vent terminal = Air Supply Inlet = Area where termination is not permitted
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