Combining our classic style with a more-powerful airflow (up to 100a2) the brushless DC motor of the 783DC uses up to 80% less energy bringing modern efficiency to the home. A return to variable speed puts you in precise control of your environment and our signature Vortex Action creates whole-room circulation keeping the entire room cool and comfortable. And when adjustability is needed its sturdy stand adjusts to 25aor 38a. Weare proud that the 783DC is designed engineered and assembled in the USA. And with our 10-year satisfaction these DC circulators will keep you comfortable for years (and years) to come.