It uses a new patented airfoil system—a system that combines patented airfoils and winglets with patent-pending AirFence technology to increase overall coverage by 28%. The winglet improves airfoil effectiveness by eliminating efficiency-robbing turbulence at the tip, while the AirFence captures air that would otherwise slip off the end of the airfoil. The 8- to 24-ft. diameter Powerfoil X2.0 was developed by a team of engineers in the Big Ass Fan Co.’s custom-built R&D facility. This thorough testing and a host of durability enhancements led the company to offer a nonprorated 15-year warranty on the new Powerfoil X2.0. www.BigAssFans.com