It's 110 degrees in the shade and there's no relief in sight. At only about 9 inches wide, the 540B creates a hurricane like effect to vent an area of stale, stagnant air. It's due to the patented Vortex action indicative of Vornado's grill design. It's more than for mere appearance. It twirls the air that passes through with up to 65 feet displacement. This AC powered, 2-speed fan is just what you need to deliver finely focused freshness while working or living anywhere. Saves Energy All Year - Evens room temperature, eliminating hot and cold spots. Can turn the thermostat up 5 degrees with the same level of comfort Easy To Clean - Patented removable grill for easy and convenient cleaning. Fully Directable Air Flow - Clip & twist in any direction. 360-degree rotation.