Fantech’s DEDPV-705 dryer exhaust duct power ventilator is designed to provide safe laundry exhaust, reduce drying time, and save energy. The manufacturer claims that the UL-listed fan maintains exhaust velocity ideal for keeping lint entrained in the flow of air to minimize the risk of fires due to lint buildup. The ventilator continues to operate briefly after the dryer stops, cooling clothes and removing humid air. A panel informs users of problems such as a locked rotor or duct blockage. The DEDPV-705 costs $450.