Profile: Berner International Corporation offers a complete line of industrial air doors/air curtains available. Industrial air doors/air curtains provide a powerful uniform stream of air engineered to protect openings against the elements. Contaminants such as dust or fumes will be retarded, providing better working conditions. Our air doors/air curtains can be installed suspended from the ceiling, around door tracks, wall mounted or vertically mounted along the side of the opening. The discharge nozzle with directional vanes can be adjusted to achieve optimal performance.