Vornado 6803DC Energy Smart Medium Pedestal Air Circulator Fan with Variable Speed Control More-powerful brushless DC motor uses up to 80 percent less energy and moves air up to 85 feet True variable speed via 99 unique airflow settings for precise airflow control Signature Vortex action provides complete air circulation throughout a room Touch-sensitive and electronic push-button controls, energy-saving timer and remote control Adjustable height from 31 to 39 inches and backed by a 10-year satisfaction guarantee Built to meet U.S. voltage requirements. Certified, safety-tested, and warrantied for use only in the U.S.