FYI Thermotech Enterprises: Energy Recovery Wheel Solutions: Since 1985 Thermotech has specialized in the manufacturing and replacement (retrofit) of energy recovery wheels. TR SERIES THERMOWHEEL tm.* is a direct replacement for: Berner, Cargocaire, Semco, Regenerative Heat Corp., Enreco, Governair, Flakt, Wing, Carnes, Heat Recovery Corp., Munters and others. TF SERIES THERMOWHEEL tm.* is designed for new air-handler applications from 20,000 to 100,00 CFM. Features: a welded steel or aluminum frame, variable or constant speed drive and available sensors and control systems. Units can be shipped in one piece or field assembled. Rotor sizes up to 16&＃039; in diameter are available. Our TC SERIES THERMOWHEEL tm.* is designed for new air-handler applications from 5,000 to 20,000 CFM. Features: a welded aluminum frame, variable or constant speed drive and available sensors and control systems. For more information on Thermotech, please visit our website. http://xxxxx/index.html Thanks,