Big Ass Fans’ Yellow Jacket is a portable fan with durability that is guaranteed for life. Its heavy-gauge steel carriage is engineered to withstand harsh environments. Powerfoil-inspired blades allow maximum efficiency and airflow coverage. The acoustically designed fan, motor and carriage result in quiet operation. Oversized wheels and an ergonomic handle contribute to maneuverability. Multiple speeds and an easily operated locking position mechanism put the amount and direction of airflow at the operator’s control. Its high efficiency design can cut energy use by over 50%.