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12
For vent systems not covered by the vent specication chart,
see your parts distributor.
If dryer is installed in a conned area, such as a bedroom,
bathroom, or closet, provision must be made for enough air
for combustion and ventilation. (Check governing codes and
ordinances.) See “Recessed Area and Closet Installation
Instructions” in the “Location Requirements” section.
A 4" (102 mm) outlet hood is preferred. However, a 2
1
⁄2" (64 mm)
outlet exhaust hood may be used. A 2
1
⁄2" (64 mm) outlet creates
greater back pressure than other hood types. For permanent
installation, a stationary vent system is required.
If An Exhaust Hood Cannot Be Used
The outside end of the main vent should have a sweep elbow
directed downward.
If the main vent travels
vertically through the roof,
rather than through the
wall, install a 180° sweep
elbow on the end of the
vent at least 2 ft. (610 mm)
above the highest part of
the building. The opening in
the wall or roof shall have a
diameter 1/2" (13 mm) larger
than the vent diameter. The
vent should be centered in
the opening.
Do not install screening or
cap over the end of the vent.
12" min.
(305 mm)*
24" min.
(610 mm)
* Minimum
clearance above
any accumulation
of snow, ice,
or debris such
as leaves
Multiple Dryer Venting
n 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 the main vent if checked and cleaned frequently. The
room where the dryers are located should have make-up air
equal to or greater than the CFM of all the dryers in the room.
n A back-draft damper kit is needed and is available from a
commercial laundry distributor; it should be installed in the
vent of each dryer to prevent exhausted air from returning into
the dryers and to keep the exhaust in balance within the main
vent. Unobstructed return air openings are required.
Each vent should enter the main vent at an angle pointing in the
direction of the airow. 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°.
Keep air openings free of dry cleaning uid fumes. Fumes create
acids which, when drawn through the dryer heating units, can
damage dryers and items being dried.
A clean-out cover should be located on the main vent for periodic
cleaning of the vent system.
30˚ max.
air ow
Air flow
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