e)Terminate vent at least six (6) feet away from adja- cent walls.
f)DO NOT terminate vent closer than five (5) feet below roof overhang.
Canadian Installations
Refer to the latest edition of CSA B149 Installation Code.
A vent shall not terminate:
a)Directly above a paved sidewalk or driveway which is located between two single family dwellings and serves both dwellings.
b)Less than 7 ft. (2.13m) above a paved sidewalk or paved driveway located on public property.
c)Within 6 ft. (1.8m) of a mechanical air supply inlet to any building.
d)Above a meter/regulator assembly within 3 ft. (900mm) horizontally of the vertical
e)Within 6 ft. (1.8m) if any gas service regulator vent outlet.
f)Less than 1 ft. (300mm) above grade level.
g)Within 3 ft (1m) of a window or door which can be opened in any building, any
h)Underneath a verandah, porch or deck, unless:
(i)the verandah, porch or deck is fully open on a minimum of two sides beneath the floor, and
(ii)the distance between the top of the vent termi- nation and the underside of the verandah, porch or deck is greater than 1 ft (30cm).
Venting Installation Tips
Support piping:
·horizontal runs- at least every five (5) feet.
·vertical runs - use braces:
·under or near elbows
Follow items listed below to avoid personal injury or property damage.
·Cut nonmetallic vent pipe with
·Do not use nonmetallic vent pipe or fittings that are cracked or damaged.
·Do not use nonmetallic vent fittings if they are cut or altered.
·Do not drill holes, or use screws or rivets, in non- metallic vent pipe or fittings.
To make metallic vent joints:
·Do not install seams of vent pipe on bottom of runs.
·Completely seal all joints and seams with silicone sealant.
NOTE: For direct vent installations where the air is piped in from outside, the protective screen on the combustion air blower may be relocated to the air inlet termination elbow to act as an inlet screen.
WARNING: Examine the venting system at least once a year. Check all joints and vent pipe connections for tightness, corrosion or deterioration.
NOTE: The words "Flue Exhaust", "Flue" and "Exhaust Vent" are used interchangeably.
Venting Configurations
The following is a detailed explanation of each venting system WITHOUT and WITH
For boilers connected to gas vents or chimneys, vent installations shall be in accordance with Part 7, Venting of Equipment, of the latest edition of National Fuel Gas Code, or in Canada, the latest edition of CSA B149 Installation Code for Gas Burning Appliances and Equipment, or applicable provisions of local build- ing codes.
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