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American Dryer Corporation
113549 - 8
The internal dimensions of the dryer’s rectangular exhaust vent ductwork are 8-inches x 20-inches (20.3 cm x
50.8 cm). A transition piece 20-inches (50.8 cm) in diameter round is supplied. The location’s exhaust duct must
be the minimum exhaust size requirement of (20-inches [50.8 cm] round duct or 315 square inches [2,032 square
centimeters] square duct) the ductwork from the dryer to the outside exhaust outlet for a horizontal run, with no
more than one (1) elbow must not exceed 30 feet (9.14 meters) for gas and 20 feet (6.09 meters) for steam
dryers. (Refer to the illustration below and on page 19.) For locations with more than one (1) elbow, the
minimum exhaust size for a gas or steam model dryer is 24-inches (60.96 cm) round duct (464 square inches
[2,993 square centimeters] duct) must be used. The horizontal or vertical duct total run on gas models must not
exceed 50 feet (15.24 meters) and steam models must not exceed 25 feet (7.62 meters), which includes the
use of no more than three (3) elbows (refer to the illustrations on page 20 and page 21). Should more than the
maximum number of elbows be used or if the run exceeds the maximum limits noted, a professional heating,
ventilating, and air-conditioning (HVAC) firm should be consulted for proper venting information.
IMPORTANT: For extended ductwork runs or where more than the specified number of elbows are used,
a professional HVAC firm should be contacted for proper venting information.
NOTE: For extended ductwork runs the cross-sectional area of a duct can only be increased to an extent.
In some cases the addition of a booster fan in the ductwork may be necessary.
210 GAS DRYER 5,300 CFM (150.08 CMM)
HORIZONTAL DRYER VENTING
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