https://www.dekut.com/Food-and-Recipes/dryer-vent-cleaning-guide-888-676-6142/ Dryer Vent Cleaning Guide - Dryer ducts that surpass 25 feet may call for a booster fan to help the dryer run safely and efficiently. The dryer service tech with Dryer Vent Wizard can add a booster fan to stimulate proper airflow. Tue, 19 Jan 2016 12:11:24 UTC en