AC Infinity AIRLIFT S20, Shutter Exhaust Fan 20" with 10-Speed Controller, EC Motor - Wall Mount Ventilation and Cooling for Sheds, Attics, Workshops, and Greenhouses

Large high-airflow shutter fan designed to remove stale air and ventilate greenhouses, garages, and more. Features a 10-level fan speed controller that utilizes PWM technology to generate precise airflow. Innovative EC motor with PWM control maximizes airflow whi