The Hurricaneâ„¢ Wind-Driven Turbine Gravity Ventilator allows users to ventilate their commercial or industrial building without the need for a powered roof exhaust fan, the company says. The unit requires no electrical or maintenance costs to operate, providing a 2-3 year payback on investment, says the company. It also offers a lower first cost because wiring, starter, and associated electrical costs are eliminated. With its lightweight aluminum design, no framing is required, the manufacturer says.

Moffitt Corporation, 1351 13th Ave. South, Ste. 130, Jacksonville Beach, FL 32250; 904-241-9944; 904-246-8333 (fax);