FanTech Dryer Booster Kits feature an inline fan and are designed to remove warm, moist air from the dryer. The backward blades allow the lint to pass through the fan. The control automatically operates the booster fan whenever the dryer is running. The handle up to 60 feet of duct and six elbows. The DBF Series Heavy-Duty Dryer Booster Kit features an FX series fan and has 220 CFM. The housing is made of galvanized steel with a baked enamel finish. The DBF Series Booster Kit has an FR series fan and features a quiet operation. Lint traps and dryer booster controls are available separately. Both dryer booster kits have a five-year factory warranty.