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DRYER VENTING REQUIREMENTS
If an Exhaust Hood Cannot be Used
The outside end of main vent should have a sweep elbow directed
downward.
*M,n,mumclearanceabove_--
a_c_mulation of snow ice ory
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 fl.
(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. 339191 O, 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.
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.
The maximum angle of each vent entering the main vent should be
no more than 30 °,
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