Product details:

The Fantech FADE 20-6 Side Wall Exhaust Fan is a 3,693 CFM commercial axial fan without its assembled housing or damper designed to quietly ventilate large commercial areas while minimizing space requirements. FADE Series impellers are wall mounted and are constructed of heavy gauge galvanized steel with a baked powder coat finish. The FADE 20-6 are statically and dynamically balanced for vibration-free operation. It features permanently lubricated sealed ball bearings, 100% controllable airflow, and is suitable for airstream temperatures up to 100 degrees Fahrenheit. Permanently Lubricated Sealed Ball Bearings Permanently lubricated sealed ball bearings extend the service life of your fan. 100% Speed Controllable On-demand ventilation and precision balancing of systems is controllable through voltage reduction. External Rotor Motor