100304526_2000545240 _Rev. 01
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27
SIDE WALL VENT OPTION FOR COLD CLIMATES
Some winter weather conditions present a risk of ice
accumulation at the intake termination screen. Such
accumulation will restrict intake air flow. If local conditions
present this risk, the termination configuration shown in
Figure 24 is recommended. This will reduce the possibility
of exhaust gas recirculation as well as reduce the chance
of ice accumulation.
If necessary to avoid snow accumulation, the intake vent
terminal may be fitted with a riser similar to that on the
exhaust vent terminal. Both the intake and exhaust vent
terminations may be 90° elbows if specified by local
requirements.
Note:
The vertical centerline of the air intake termination
and the vertical centerline of the exhaust vent termination
must not be closer than 8” .
Important:
Elbows (excluding the termination elbow) and
risers must be considered when calculating total equivalent
vent length (see Table 5).
WALL
MOUNTED
SUPPORT
BRACKET
8” MIN.
24” MAX.
INTAKE
TERMINAL
EXHAUST
TERMINAL
VENT
SCREEN
INSIDE
12” ABOVE
GRADE OR
12” ABOVE
ANTICIPATED
SNOW LEVEL
VENT
SCREEN
Figure 24.
Debris screens may be removed while there is a risk of ice
accumulation but this can make the air intake susceptible
to debris buildup, the entry of birds, other small animals or
rodents. If the debris screens are removed to prevent ice
accumulation, it is recommended that they be re-installed
when the risk of ice accumulation has passed.
