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IMPORTANT VENTING REMINDERS
1. Ductwork sizing and installation should be done by a qualified professional.
2. The dryer must be vented to the outdoors.
3. The ductwork should be routed as short as possible to the outdoors with as few turns as possible.
4. Avoid 90º turns, use 30º or 45º turns instead.
5. The size (cross-sectional area) of the ductwork will depend on the application (i.e., single dryer venting,
common venting, etc.), as well as the length of the duct and the amount of elbows. DO NOT exceed the
specifications noted in this manual.
IMPORTANT: UNDER NO CIRCUMSTANCES can the dryer be vented to the outdoors using a
6-inch (15.24 cm) diameter exhaust duct!!!
6. The inside of the ductwork should be as smooth as possible with no projections from the sheet metal
screws.
7. ALL ducts should be taped to prevent moisture and lint from escaping into the building.
8. Inspection/clean out doors should be installed throughout strategic points in the ductwork for periodic
inspection and cleaning.
9. Whenever the duct passes through combustible materials, the opening must be 2-inches (5.08 cm) larger
than the duct (all the way around). The duct must be centered within this opening.
10. The outside of the ductwork must be protected from the weather. A 90º elbow must be used for a
horizontal run and when going vertically through the roof by using a 180º turn to point the opening downward.
The distance between the exhaust duct and the nearest obstruction (i.e., roof or ground) must be twice the
diameter of the duct.
11. DO NOT use screens, louvers, or caps on the outside opening of the exhaust ductwork.
12. The ductwork exhaust outlets should not be located near make-up air openings. If make-up air openings
are located too close to the exhaust outlet, lint and fumes may be drawn back into the dryer area
through these openings.
13. Exhaust back pressure measured by a manometer at each basket (tumbler) exhaust duct must be no less
than 0 and must not exceed 0.3 inches (0.74 mb) of water column (W.C.) when both baskets (tumblers)
are operating.
IMPORTANT: It is recommended that exhaust or booster fans not be used in the exhaust ductwork
system.