Fantech dryer booster fans are specially designed to solve the problems caused by long duct runs on clothes dryers. Long duct runs with multiple elbows can cause extended drying time as well as lint and moisture build-up within the dryer duct.
When is a dryer booster necessary?
According to some dryer installation instructions and local building codes, booster fans should be added in the dryer duct run when the length of the duct exceeds 25 feet with no bends, 20 feet with one bend or 15 feet with two bends. Dryers were designed to be located on an outer wall and directly vented out of the building. In today's home, condo and apartment designs the laundry has been moved to interior locations causing the use of extensive lengths of duct. Most typical dryers cannot operate efficiently against the resistance created by the necessary duct work. In these applications a Fantech dryer booster fan is the perfect solution.
How does it work?
When the dryer is on, Fantech's patented pressure sensing switch automatically turns the booster fan on. The warm, moist air in the dryer duct is exhausted quickly.
Calculating duct run
To calculate the length of your planned duct run, measure from the dryer to the external venting point in roof or wall. For each bend or elbow add 5-7 feet to your total duct run calculations. All of Fantech's Dryer Boosters can be used on runs up to 130 feet except the DBF110 which is effective up to 108 feet.