We bought the Fans ( 2 - 60" & 4 - 56" ) to resolve a Smoke Issue within our Community Center. The Professional Smoke Reducing System installed many years ago was woefully inadequate. The Fans have succeeded where the older system failed, it removes the smoke from the patrons table area which allows the separate exhaust fans in the ceiling to remove it from the Hall altogether. The 6 fans handle about a 6,000 Sq. Ft. Room.