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NOTICE
Exhaust transition from 2" pipe to 3" pipe must be
made in vertical run. (Transition pieces not included.)
General Installation Requirements:
6.
A. Position termination where vent vapors will not
damage plants/shrubs, air conditioning equipment,
or siding on the house.
B. Position termination so it will not be effected by
wind eddy, air born leaves, snow, or recirculated
flue gases. For high wind location termination tees
are required.
C. Position termination where it will not be subjected
to potential damage by foreign objects, such as
stones, balls, etc.
D. Position termination where vent vapors are not
objectionable.
E. Put vent on wall away from prevailing winter wind.
Locate or guard vent to prevent accidental contact
with people or pets.
F. Avoid locations where snow may drift and block
vent. Ice or snow may cause boiler to shut down if
vent becomes obstructed.
G. Under certain conditions, flue gas will condense,
forming moisture, and may be corrosive. In such
cases, take steps to prevent building materials at
vent from being damaged by exhaust of flue gas.
US Installation Requirements
• Venting system shall terminate at least 3 ft. (0.9m)
above any forced (mechanical) air inlet located within
10 ft. (3m) horizontally to any building.
• Venting system shall terminate minimum of 1 ft.
(0.3m) above grade or expected snow level in such a
way that it cannot be blocked by snow.
• Termination shall be not less than 7 ft. (2.1m) above
adjacent public walkway, paved driveway or sidewalk.
• Vent terminal shall not be installed closer than 3 ft.
from inside corner of L shaped structure.
• Venting system shall terminate at least 1 ft. from any
air opening (i.e. window, door, or non-mechanical inlet)
into any building.
• Vent termination should be kept at least 3 ft. away
from vegetation.
• Venting system shall terminate at least 4 ft.
horizontally from, and in no case above or below,
unless 4 ft. (1.22m) horizontal distance is maintained,
from electric meters, gas meters, regulators, and relief
equipment.
• Venting system shall not terminate where hot gases
can cause property damage, personal injury, or
where condensate may cause hazardous frost or ice
accumulations.
7 - COMBUSTION AIR AND VENT PIPE
19
• Every outside wall penetration shall be permanently
sealed to prevent entry of combustion products into
building.
• Venting that discharges flue gases perpendicular to
the adjacent wall shall be located not less than 10 ft.
(3m) horizontally or must be a minimum of 2 ft. (0.6m)
above or must be a minimum of 25 ft. (7.6m) below
from an operable opening in an adjacent building.
Canadian Installation Requirements
• Venting system shall terminate at least 6 ft. (1.8m)
away from any forced (mechanical) air inlet to any
building.
• Venting system shall terminate a minimum of 1 ft.
(0.3m) above grade or expected snow level such a way
that it cannot be blocked by snow.
• Termination shall be not less than 7 ft. (2.1m) above
adjacent public walkway, paved driveway or sidewalk
• Vent terminal shall not be installed closer than 3 ft.
from inside corner of L shaped structure.
• Vent shall not terminate within 1 ft. (0.3 m) for inputs
up to and including 100,000 Btu/hr (30kW) and 3 ft.
(0.9 m) for inputs exceeding 100,000 Btu/hr (30kW) of
window or door that can be opened in any building, of
any non-mechanical air-supply inlet to any building, or
of combustion air inlet of any other appliance.
• Venting system shall terminate at least 4 ft.
horizontally from, and in no case above or below,
unless 4 ft. (1.22m) horizontal distance is maintained,
from electric meters, gas meters, regulators, and relief
equipment.
• Venting system shall not terminate where hot gases
can cause property damage, personal injury, or
where condensate may cause hazardous frost or ice
accumulations.
• First 3 feet (900mm) of plastic venting must be readily
accessible for visual inspection.**
• Vent shall not terminate underneath veranda, porch or
deck unless,
a. The veranda, porch or deck is fully open on minimum
of two sides beneath floor, and
b. The distance between top of vent termination and the
underside of the veranda, porch or deck is greater
than 1 ft. (0.3 m).
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