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Sidewall Venting Requirements
Confirm that Code-stipulated vent terminal positioning
restrictions for minimum clearance distances to grade
level below the rear of the wall sleeve, gas and electric
meters, regulators, and relief equipment or adjacent
public walkways, adjacent buildings, openable windows,
and other building openings are consistent with local
codes and/or ANSI-Z223.1 and/or CSA B149.1. The
ANSI Z223.1 specifications include the following:
The vent terminal shall terminate at least 3 feet above
any forced air inlet located within 10 feet. This provision
does not apply to the combustion air intake of a direct
vent appliance. See Figure 4 Sidewall Venting Require-
ments.
1. The vent terminal shall be at least 1 foot above
grade.
2. The vent system of a direct vent appliance with an
input of 50,000 BTU/H or less shall be located at least
9 inches from any openings through which flue gases
can enter.
3. Vent terminals shall not terminate over a public walk-
way or over an area where condensate or vapor cloud
could create a nuisance or hazard or could be detri-
mental to the operation of regulators, relief valves, or
other equipment.
CAUTION
Do not use this appliance if any part has been
under water. Immediately call a qualified
service technician to inspect the appliance and
to replace any part of the control system and
any gas control that has been under water.
EXCEpTIONS FOR INSTALLATION IN CANADA
1. The vent terminal shall be located at least 1 foot from
any window or door which can be opened in any
building, any non-mechanical air supply inlet to any
building, or the combustion air inlet to any other
appliance.
2. The vent terminal shall be located at least 6 feet from
any mechanical air supply to a building.
3. The vent terminal shall not terminate above a meter/
regulator assembly within 3 feet horizontally of the
vertical center line of the regulator and shall be at least
3 feet from any gas service regulator vent outlet or
electrical device.
4. The vent terminal shall not terminate less than 7 feet
above a paved sidewalk or a paved driveway located
on public property.
5. The vent terminal shall not terminate directly above a
paved sidewalk or a paved driveway, which is located
between two single-family dwellings.
6. The vent terminal shall not terminate underneath a
porch, veranda, or deck unless the veranda, porch,
or deck is open on a minimum of two sides beneath
the floor, and the distance between the top of the vent
terminal and the underside of the veranda, porch, or
deck is at least 1 foot.
The installer is to ensure that adequate
combustion and ventilation air is provided.
CAUTION
