XXV Exhaust Clearances Page

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XXV Installation and Operation Manual - PDF  (1785 kb)

Requirements for Terminating the Venting
WARNING: Venting terminals must not be recessed
into a wall or siding.
NOTE: Only the Harman Direct Vent Wall Pass through
(part # 1-00-677077) or PL listed vent pipe
wall pass-throughs and fire stops should be used
when venting through combustible materials.
NOTE: Always take into consideration the effects of the prevailing wind direction or other wind currents that may cause fly ash and/or smoke when placing the termination vent.
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" to the side, 48" below the window/door, and 12" above the window / door.
( 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 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.
(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 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
NOTE: Where passage through a wall, or
partition of combustible construction is desired,
the installation shall conform to CAN/CSA-B365.
(if in Canada)