American Dryer Corp MLG-45PDB installation manual Single Dryer Venting without Transition Piece

Single Dryer Venting without Transition Piece

A= 20 feet (6.10 meters)

B= 8-inches (20.32 cm)

The length of the ductwork from the dryer to the outside exhaust outlet must not exceed 20 feet (6.09 meters). The minimum diameter of this ductwork must be at least 8-inches (20.32 cm) when each pocket/tumbler is vented individually and 10-inches (25.4 cm) when both pockets/tumblers are combined. Including tumbler/dryer elbow connections or elbows used for outside protection from the weather, no more than 2 90° elbows should be used in the exhaust duct run. If more than the equivalent of 2 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) for individual pockets/ tumblers or 10-inches (25.4 cm) for individual dryers.

IMPORTANT: To maintain proper performance, no more than 4 dryers should be connected to 1 main common duct.

The illustration below shows the minimum cross-sectional area for multiple dryer round or square venting. These figures must be increased if the main duct run from the last dryer to where it exhausts to the outdoors is longer than 20 feet (6.09 meters) or has more than 1 elbow in it.

Multiple Dryer Venting with 10-Inch (25.4 cm) Diameter

1,200 cfm (33.98 cmm) Exhaust Connections at Common Duct

NUMBER OF DRYERS		4	3	2	1
MINIMUM CROSS-	SQ IN	254	200	155	80
SECTIONAL AREA	SQ CM	1638	1290	999	516
MINIMUM ROUND	IN	18	16	14	10
DUCT DIAMETER	CM	45.72	40.64	35.56	25.4

A = 10-inches (25.4 cm) B = 20 feet (6.09 meters)

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.

Multiple Dryer Venting with 8-Inch (20.32 cm) Diameter

600 cfm (16.99 cmm) Exhaust Connections at Common Duct

NUMBER OF DRYERS		8	7	6	5	4	3	2	1
MINIMUM CROSS-	SQ IN	254		200		155		80
SECTIONAL AREA	SQ CM	1638		1290		999		516
MINIMUM ROUND	IN	18		16		14		10
DUCT DIAMETER	CM	45.72		40.64		35.56		25.4

A = 8-inches (20.32 cm)

B = 20 feet (6.09 meters)

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.

113489 - 5 (W10185535) Maytag Co. 9