If your clothes dryer seems to be taking longer than usual to dry a load of laundry, or if you’re concerned about the efficiency and safety of it because of an excessively long dryer duct run, the solution might be simpler than you think. What Is a Dryer Duct Booster? A dryer duct booster is a type of in-line fan or fan kit that is installed in the dryer ductwork between the clothes dryer and the exterior exhaust outlet. It’s designed to help move the air that comes from the dryer and exhaust it outside more efficiently when your dryer duct run is especially long or has numerous elbows or bends. Why Would You Need One? Here are a few reasons why a booster fan would be necessary: 1. Extra-long Duct Runs Most dryers are designed to exhaust air effectively over a fairly short distance, which is typically 25 feet or less. If your dryer vent duct is longer than that, or if it has multiple elbows or “turns”, the airflow can be restricted. A booster fan will compensate for this by providing the extra boost needed to move air efficiently through the duct and exhaust it outside. 2. Reduce Drying Time When airflow is restricted because of ductwork length or excessive bends, your dryer has to work much harder and can take longer to dry clothes. A booster fan helps maintain proper airflow, which can significantly reduce drying time and improve efficiency, ultimately saving energy. 3. Preventing Moisture and Lint Build-Up The possibility of build-up of moisture and lint inside the dryer ductwork is high when there’s inadequate ventilation. This not only reduces performance but also increases the risk of mold and even fire. A booster fan helps keep air and lint moving, reducing the risk of this. Do They Require Maintenance? Like any part of your HVAC system or some other appliances, they do require occasional maintenance, mainly cleaning lint from the fan blades, housing and ductwork. All Dryer Duct Boosters Are Not Created Equal Though all dryer duct boosters may be intended for