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If an Exhaust Hood Cannot Be Used
The outside end of main vent should have a sweep elbow
directed downward.
12" min.
(305 mm)*
* Minimum clearance above
any accumulation of snow,
ice, or debris such as leaves
If main vent travels vertically through the roof, rather than
through wall, install a 180° sweep elbow on end of vent at least
2 ft. (610 mm) above surface of roof.
The opening in wall or roof shall have a diameter 1⁄2" (13 mm)
larger than vent diameter. Vent should be centered in opening.
Do not install screening over end of vent for best performance.
Multiple Dryer Venting
A main vent can be used for venting a group of dryers. The
main vent should be sized to remove 200 CFM of air per dryer.
Large-capacity lint screens of proper design may be used in
main vent if checked and cleaned frequently. The room where
the dryers are located should have make-up air equal to or
greater than CFM of all the dryers in the room.
Back-draft Damper Kit, Part No. 3391910, is available from
your distributor and should be installed in the vent of each
dryer to keep exhausted air from returning into dryers and to
keep exhaust in balance within main vent. Unobstructed return
air openings are required.
24" min.
(610 mm)
DRYER VENTING REQUIREMENTS
Each vent should enter the main vent at an angle pointing in
the direction of the airflow. Vents entering from the opposite
side should be staggered to reduce the exhausted air from
interfering with the other vents.
air ow
The maximum angle of each vent entering the main vent should
be no more than 30. °
30˚ max.
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