Maytag MDG30MNV, MDG30PNH installation manual Multiple Dryer Common Venting

MULTIPLE DRYER (COMMON) VENTING

IMPORTANT: For extended ductwork runs, the cross section 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 heating, ventilating, and air-conditioning (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 (Dimension A) must be at least 8-inches (20.32 cm).

IMPORTANT: No more than four (4) dryers should be connected to one (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 Dimension B or has more than one (1) elbow in it.

For gas models Dimension B is 20 feet (6.096 meters).

Multiple Dryer Venting (Gas) with 8-Inch (20.32 cm) Diameter 460 cfm (13 cmm) Exhaust Connections at Common Duct

NUMBER OF DRYERS		4	3	2	1
MINIMUM CROSS-	SQ IN	164	120	80	54
SECTIONAL AREA	SQ CM	1058	774	516	348
MINIMUM ROUND	IN	14	12	10	8
DUCT DIAMETER	CM	35.56	30.48	25.4	20.32

NOTE 1 Opening 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.

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