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4
Sidewall direct venting
Vent/air termination – sidewall
Follow instructions below when determining
WARNING
⚠
vent location to avoid possibility of severe
personal injury, death, or substantial
property damage.
A gas vent extending through an exterior
WARNING
⚠
wall shall not terminate adjacent to a wall
or below building extensions such as eaves,
parapets, balconies, or decks.
comply could result in severe personal injury,
death, or substantial property damage.
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 General Venting Section of this
manual.
2.
You must consider the surroundings when terminating
the vent and air:
a.
Position the vent termination where vapors will
not
damage
nearby
conditioning equipment or be objectionable.
b.
The flue products will form a noticeable plume as
they condense in cold air. Avoid areas where the
plume could obstruct window views.
c.
Prevailing
winds
condensate and water/ice buildup where flue
products impinge on building surfaces or plants.
d. Avoid possibility of accidental contact of flue
products with people or pets.
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.
Sidewall vent and air inlet terminations
WARNING
⚠
must terminate in the same pressure zone.
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 finishes.
h. Do not locate the terminations over public walkways.
i.
Do not locate the terminations near soffit vents, crawl
space vents, or other areas where condensate or vapor
could create a nuisance, hazard, or cause property
damage.
j.
Do not locate the terminations where condensate
vapor could cause damage or could be detrimental
to the operation of regulators, relief valves, or other
equipment.
k.
Terminations must be located a minimum of 12" above
grade or maximum snow line.
22
Failure to
shrubs,
plants,
or
could
cause
freezing
Installation & Operation Manual
Figure 4-1A PVC/CPVC/Polypropylene Sidewall Termination
of Air and Vent
Table 4A Sidewall Vent Kits
Model
Kit Number Air Intake Vent Size
400 - 500
100157611
650 - 800
100157613
1000
100157612
air
If using the alternate sidewall termination:
3. The air piping must terminate in a down-turned elbow
as shown in FIG. 4-1B.
recirculation of flue products into the combustion air
of
stream.
4. The vent piping must terminate in an elbow pointed
outward or away from the air inlet, as shown in FIG. 4-1B.
Do not exceed the maximum lengths of the
WARNING
⚠
outside vent piping shown in FIG. 4-1B.
Excessive length exposed to the outside
could cause freezing of condensate in the
vent pipe, resulting in potential water heater
shutdown.
Figure 4-1B Alternate PVC/CPVC Sidewall Termination
of Air and Vent w/Field Supplied Fittings
TO BOILER
INTAKE AIR
CONNECTION
FROM BOILER
VENT PIPE
CONNECTION
TERMINATION
PLATE
TO BOILER
INTAKE AIR
CONNECTION
FROM BOILER
VENT PIPE
CONNECTION
VENT / AIR
TERMINATION
GRADE OR
SNOW LINE
4"
4"
6"
This arrangement avoids
BIRD SCREEN
12" MIN
12"
MIN
BIRD
SCREEN
GRADE OR
SNOW LINE
12"
MIN
TO
OVER-
HANG
12"
MIN
4" vent
6" vent
6" vent
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