Big Ass Fans specializes in their name, Big Ass Fans. Introducing the Powerfoil® X, the strongest industrial fan on the planet. The fan is up to 24ft. in length and can efficiently move air in spaces up to 30,000 square feet. This sucker blows hard. Not only does the Powerfoil deliver a windstorm, it has an optional built-in camera so you can record what goes on below. I have the urge to buy one of these just so I can start chucking things at it. Get one at Big Ass Fans.