Kool-it Max Performance 20" Super High Velocity 3 Speed Large Industrial Floor Fan Black - No Assembly Required Flagship Model Most Powerful motor with Extra large blades designed to move the most air out of any fan! ETL Certification listed for safety - Metal construction built tough to withstand the harsh environment Three speed settings for better air comfort. The third speed is super high velocity and is rated at the highest airflow among any fan! Tilt adjustable head allows you to focus airflow where you need it Comes with the Best Warranty backed by Kool-it TM, a Lavohome Company. Buy Now 100% Guaranteed satisfaction! 3 year warranty included