Each EPIC HVLS fan is the result of careful engineering. And the inspiration for such well thought out engineering comes from a variety of sources.
For example, EPIC HVLS fans have a lot in common with the Sikorsky (Lockheed Martin) UH-60 Black Hawk helicopter. In fact, the design for the fan blade downturned winglets (blade tips) is a derivation from the famous helo itself.
Rather than reinvent the wheel (or blades, in this case), EPIC has carefully examined how winglets were being used on rotary helicopters manufactured by top industry manufacturers Sikorsky as well as Bell Helicopter (Textron).