Overview: This case study reviews the performance of Cambridge high velocity Thermal Air Curtains specifically designed for demanding car wash applications. The requirements that had to be addressed by the Cambridge heaters installed at the harsh, damp, and corrosive environment of a car wash tunnel in Chicago are listed, illustrating the various system components and their functions. The paper states how Cambridge heaters helped mechanical contractors to stay open for business in cold, belowfreezing winter days. System's capabilities in reducing the icing of floors, brushes, and equipment, as well as mold and mildew build-up during warm summer months are also highlighted.