Tjernlund LB2 Commercial Capacity Dryer Duct Booster Fan

LB2 Commercial Capacity Dryer Duct Booster Fan - 230 CFM Incorporating dryer booster fans in clothes dryer ducts has increased substantially with the placement of laundry rooms not adjacent to outside walls. Duct runs often exceed 25 equivalent feet (90 degree elbows equal 5 additional feet of duct length, 45 degree elbows equal 2.5 feet) that many clothing dryer manufacturers set as a maximum duct length. The LB2XL booster fan is rated for duct lengths up to 120 equivalent feet.