Greenheck is America's leading manufacturer of ventilation equipment. Greenheck designs, manufactures, and ships fans and ventilators, centrifugal and vane axial units, make-up air units, energy recovery ventilators, dampers, louvers, kitchen ventilation systems, and laboratory exhaust systems around the world. No other company offers a wider selection of these products. The company has sales in excess of $475 million annually, employs more than 2,650 and has over 1.5 million square feet of manufacturing space. No matter how you measure it, Greenheck is number one in air movement and control.