... 738050-6043 401416300600730. 1 Whats an Air Curtain? An air curtain is an invisible curtain formed by strong airflows generated by tubular ... the buildings. Mothproof and dustproof function 3 Available placesAn air curtain is mounted above a door of markets, theaters, ... conference rooms, cool houses, operating rooms and households for refrigeration, air conditioning, dust prevention and heat insulation.