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FIGURE 9 - PERISCOPED VENT DETAIL
RECOMMENDED
*
MOISTURE IN THE FLUE GASES CONDENSES AS IT LEAVES THE TERMINAL. THIS MOISTURE
CAN FREEZE ON EXTERIOR WALLS, ON SOFFITS, AND OTHER NEARBY OBJECTS. SOME
DISCOLORATION IS TO BE EXPECTED; HOWEVER, IMPROPER LOCATION OR INSTALLATION CAN
Caulk all cracks, seams or joints within a 6 foot radius of the termination.
Do not terminate under a deck unless there is adequate clearance to prevent damage from the fl ue gases.
A termination may be located at the end of a patio deck. Piping running beneath the deck must be suitably
insulated and suspended in a manner to prevent condensate from collecting and freezing.
Do not locate the terminal on the side of the building facing the prevailing winter winds.
9.2
IN CANADA
In addition to the general guidelines, in Canada, the non-direct vent exhaust shall not terminate:
•
Directly above a paved sidewalk or paved driveway which is located between two single-family dwellings and
serves both dwellings;
•
Less than 7 feet above a paved sidewalk or paved driveway located on public property;
•
Within 6 feet of a mechanical air supply inlet to any building;
•
Above a meter/regulator assembly within 3 feet horizontally of the center line of the regulator;
•
Within 6 feet of any service regulator vent outlet;
•
Less than 12" above grade level or anticipated snow level;
•
Within 12" of any door, window, or non-mechanical air supply inlet to any building;
•
Within 12" of the combustion air inlet of any other appliance;
•
Underneath a veranda, porch or deck, unless (a) the veranda, porch or deck is fully open on a minimum of
two sides beneath the fl oor, and (b) the distance between the top of the vent termination and the underside
of the veranda, porch or deck is greater than 12".
9.3
IN UNITED STATES
In addition to the general guidelines, in the United States, the non-direct vent exhaust shall be installed in
accordance with the following:
•
The clearance from the bottom of the terminal to grade shall be 12".
•
The vent shall not terminate over public walkways or over an area where condensate or vapor could
create a nuisance or hazard.
•
The vent terminal shall be installed 4 feet below, 4 feet horizontally from, or 1 foot above any door, window,
soffi t, under eave vent or gravity air inlet to the building.
•
The vent terminal shall have a minimum horizontal clearance of 4 feet from electric meters, gas meters,
regulators and relief equipment.
*18" MIN. FOR COLD CLIMATES
(SUSTAINED 0°F (-17°C) FOR
24 OR MORE CONSECUTIVE
CAUSE STRUCTURAL OR EXTERIOR FINISH DAMAGE TO THE BUILDING.
FIGURE 10 - VERTICAL VENTING
HOURS
CAUTION
!
!
23
W415-1064 / 11.11.11
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