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10 Maytag Co. 113413-11
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Outside Ductwork Protection
To protect the outside end of the horizontal ductwork from the
weather, a 90° elbow bent downward should be installed
where the exhaust exits the building. If the ductwork travels
vertically up through the roof, it should be protected from the
weather by using a 180° turn to point the opening downward.
In either case, allow at least twice the diameter of the duct
between the duct opening and the nearest obstruction (refer
to the diagram).
Important
Do not use screens, louvers, or caps on the
outside opening of the exhaust ductwork.
Single Dryer Venting
Important
For extended ductwork runs, the cross-sectional
area of the ductwork can only be increased to an
extent. When the ductwork approaches the maximum
limits as noted in this manual, a professional HVAC firm
should be consulted for proper venting information.
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NOTE 1 Opening from combustible materials must be 2-inches (5.08 cm)
larger than the duct (all the way around). The duct must be centered
within this opening.
NOTE 2 Distance should be 2 times the diameter of the duct to the nearest
obstruction.
The length of the ductwork from the dryer to the outside exhaust
outlet, must not exceed 12 feet (3.66 meters). The minimum
diameter of this ductwork must be at least 8-inches (20.32
cm) even though the dryer exhaust duct connection is
smaller. Including tumbler/dryer elbow connections or
elbows used for outside protection from the weather, no more
than four 90° elbows should be used in the exhaust duct run.
If more than the equivalent of four 90° elbows are used, the
cross-sectional area of the ductwork must be increased.
Multiple Dryer (Common) Venting
Important
For extended ductwork runs, the cross-sectional
area of the ductwork can only be increased to an
extent. When the ductwork approaches the maximum
limits as noted in this manual, a professional HVAC firm
should be consulted for proper venting information.
If it is not feasible to provide separate exhaust ducts for each
dryer, ducts from individual dryers may be channeled into a
“common main duct.” The individual ducts should enter the
bottom or side of the main duct at an angle not more than 45º
in the direction of airflow. The main duct should be tapered,
with the diameter increasing before each individual duct is
added. The minimum diameter of the individual ductwork
must be at least 8-inches (20.32 cm).
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A = 12 feet (3.66 meters) B = 8-inches (20.32 cm)