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E. EXHAUST REQUIREMENTS
Exhaust ductwork should be designed and installed by a qualified professional. Improperly sized ductwork will
create excessive back pressure, which results in slow drying, increased use of energy, overheating of the dryer,
and shut down of the burner by the airflow (sail) switches, burner hi-limits, or basket (tumbler) hi-heat thermostats.
The dryer must be installed with a proper exhaust duct connection to the outside.
CAUTION: This dryer produces combustible lint and must be exhausted to the outdoors.
CAUTION: IMPROPERLY SIZED OR INSTALLED EXHAUST DUCTWORK CAN
CREATE A POTENTIAL FIRE HAZARD.
The exhaust ductwork should be laid out in such a way that the ductwork travels as directly as possible to the
outdoors with as few turns as possible. When single dryer 10-inches (25.4 cm) vertical venting is used, the
ductwork from the dryer to the outside exhaust outlet must not exceed 35 feet (10.67 meters) or for 10-inches
(25.4 cm) horizontal 10 feet (3.05 meters). In the case of multiple (common) dryer venting, the distance from
the last dryer to the outside exhaust outlet must not exceed 15 feet (4.57 meters). The shape of the exhaust
ductwork is not critical so long as the minimum cross-sectional area is provided.
It is suggested that the use of 90º turns in ducting be avoided; use 30º or 45º angles instead. Excluding basket
(tumbler)/dryer elbow connections or elbows used for outside protection from the weather, no more than two (2)
elbows should be used in the exhaust duct run. If more than two (2) elbows are used the cross section area of
the ductwork must be increased in proportion to the number of elbows added.
1. Exhaust Connections of Top and Bottom Baskets (Tumblers)
There is no common venting connection provided with the dryer. Each basket (tumbler) exhaust duct is
provided with its own back draft damper. Each basket (tumbler) can be exhausted directly outdoors
independently or connected to a common duct. Both single or common ductwork can be rigid ducting or
flexible ducting. For common connections, a kit (ADC Part No. 882035) is available from the factory and
includes the necessary flex ducting, elbows, and “Y” assembly, etc., to join the top and bottom exhausts
together.
ALL ductwork joints must be taped to prevent moisture and lint from escaping into the building.
IMPORTANT: Exhaust back pressure measured by a manometer at each basket (tumbler) exhaust
duct area must be no less than 0 and must not exceed 0.3 inches (0.74 mb) water
column (W.C.) when both baskets (tumblers) are operating.
NOTE: Common exhaust connections of top and bottom baskets (tumblers) should be installed in
such a manner that the back guards can be removed easily for servicing.
2. Single Dryer Venting
Where possible, it is suggested to provide a separate exhaust duct for each dryer. The exhaust ductwork
should be laid out in such a way that the ductwork travels as directly as possible to the outdoors with as
few turns as possible. It is suggested that the use of 90º turns in ducting be avoided; use 30º or 45º angles
instead. The shape of the exhaust ductwork is not critical so long as the minimum cross-sectional area is
provided.