3-Speed Fan Control Help create a cool and comfortable environment in your home, garage, warehouse, gym or other large space with this Comfort Zone 20" box fan. It’s designed with an easy-to-use rotary dial for 3-speed fan control that lets users optimize air circulation and airflow for improved ventilation. Saves Money and Energy This high-performance industrial fan can help users save money while reducing energy consumption in their homes and offices. The addition of a box fan helps lessen the strain on an air-conditioning unit by aiding full-force air circulation and helping the air to circulate more quickly. When you place this 3-speed box fan in or near a window with the blades facing away from the window screen, it can help draw in cool air to keep you comfortable. Turn the industrial fan so the blades are facing towards the window screen instead, and they will help to pull the hot air out of the room. Lightweight Convenience Whether you’re using this industrial fan for garage, workshop, gym or home use, you’ll appreciate the lightweight construction and convenient carrying handle that make it easy to transport as needed. Despite the lightweight construction, this fan features high performance blades designed for smooth operation and lasting durability.