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11.11 - Sidewall
termination - Two
pipes
11.11.1 - Vent/air
termination
WARNING!!!
A gas vent
extending through an exterior
wall shall not terminate
adjacent to a wall or below
building extensions such as
eaves, parapets, balconies, or
decks. Failure to comply could
result in severe personal injury,
death, or substantial property
damage.
WARNING!!!
Do not
connect any other appliance
to the vent pipe or multiple
heaters to a common vent
pipe. Failure to comply could
result in severe personal injury,
death, or substantial property
damage.
NOTICE Installation must comply
with local requirements and with the
National Fuel Gas Code, ANSI Z223.1
for U.S. installations or CSA B149.1
for Canadian installations.
11.11.2 - Determine
location
Locate the vent/air terminations using
the following guidelines:
1. The total length of piping for vent or
air must not exceed the limits given
in the Section 11.4.
2. You must consider the surroundings
when terminating the vent and air:
a. Position the vent termination
where vapors will not damage
nearby shrubs, plants or air
conditioning equipment or be
objectionable.
b. The fl ue products will form
a noticeable plume as they
condense in cold air. Avoid areas
where the plume could obstruct
window views.
c. Prevailing winds could cause
freezing of condensate and
water/ice buildup where fl ue
products impinge on building
surfaces or plants.
d. Avoid possibility of accidental
contact of fl ue products with
people or animals.
e. Do not locate the terminations
where wind eddies could
affect performance or cause
recirculation, such as inside
building corners, near adjacent
buildings or surfaces, window
wells, stairwells, alcoves,
courtyards, or other recessed
areas.
f. Do not terminate above any door
or window. Condensate can
freeze, causing ice formations.
g. Locate or guard vent to prevent
condensate damage to exterior
fi nishes.
11 - INSTALLATION - Vent and combustion air
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