This Active Air ACFB8 8 inch in-line booster fan is an energy efficient way to help improve the chill inside your grow room, kitchen, or other warm areas. It can work as a standalone fan or may be mounted in-line with your existing 8 inch duct work to increase airflow. Rated at 471 cubic feet per minute (CFM), this fan moves free air gentle enough that it won't knock over or harm planters and pots. Portable with quiet operation, it is made from heavy duty construction and UL-recognized components. Includes a pre-wired junction box and 8 foot power cord.