Greenheck is known worldwide as the leading manufacturer of air-movement and control equipment, including fans, dampers, louvers, kitchen ventilation hoods, and energy recovery and make-up air units. Greenheck equipment is used in all types of commercial, institutional, and industrial buildings in applications from comfort ventilation to manufacturing processes. Its flagship ventilation products are typically found behind walls, in ductwork or on the roofs of hospitals, office buildings, hotels, shopping malls, restaurants, schools, industrial plants and other commercial buildings. Their function, basically, is to move air in, out and around a building — making life inside a lot more pleasant.

Greenheck is also a major, multi-brand corporation, representing a number of other affiliated entities (Accurex, Airolite, Innovent, Precision Coils, and Valent) offering architectural louvers and sunshades, specialized air-handling systems, heating and cooling coils and many related accessories and services. (See Other Greenheck Corporate Brands.)