4
Sidewall direct
venting
Vent/air termination – sidewall
TO BOILER
INTAKE AIR
CONNECTION
FROM BOILER
VENT PIPE
CONNECTION
TERMINATION
PLATE
BIRD SCREEN
GRADE OR
SNOW LINE
12”
MIN
BIRD SCREEN
12” MIN
15” MAX
Do not exceed the maximum lengths of the
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 boiler
shutdown.
Figure 4-1B Alternate PVC/CPVC/ Polypropylene Sidewall
Termination of Air and Vent w/Field Supplied Fittings
WARNING
If using the alternate sidewall termination:
3. The air piping must terminate in a down-turned elbow
as shown in FIG. 4-1B. This arrangement avoids
recirculation of flue products into the combustion air
stream.
4. The vent piping must terminate in an elbow pointed
outward or away from the air inlet, as shown in FIG. 4-1B.
TO BOILER
INTAKE AIR
CONNECTION
FROM BOILER
VENT PIPE
CONNECTION
VENT / AIR
TERMINATION
GRADE OR
SNOW LINE
12"
MIN
12"
MIN
TO
OVER-
HANG
POSSIBLE ORIENTATIONS
Model
Kit Number
Vent Size
55 - 110
KIT30044
2 inch vent
110 - 285
KIT30045
3 inch vent
399
KIT30046
4 inch vent
Table 4A Sidewall Vent Kit
Installation & Operation Manual
22
Follow instructions below when
determining vent location to avoid
possibility of severe personal injury,
death, or substantial property damage.
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.
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 on page 16
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 shrubs, plants or air
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 could cause freezing of
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.
WARNING
WARNING
WARNING
Sidewall vent and air inlet terminations
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.
Figure 4-1A PVC/CPVC/Polypropylene Sidewall
Termination of Air and Vent
