The VENTS-US VK 125 PS Dryer Booster Fan System is engineered to boost dryer efficiency in ductwork up to 125 feet or containing multiple bends-conditions where airflow resistance can hinder dryer performance and safety. By improving exhaust airflow, this system ensures effective ventilation of heat, moisture, and lint. The fan features automatic pressure switch that detects when air is flowing through the ventilation duct, turning the fan on and off automatically. VENTS dryer booster fan saves energy by significantly reducing drying time and it reduces lint built up that is potential fire hazard. Mount the VK 125 PS booster fan to the wall or ceiling at least 15 ft. from the dryer and in the path of the existing vent. Connect the vent to the booster fan and plug it in. VENTS-US VK 125 PS booster fan enhances the efficiency of any residential, commercial or industrial dryer.