AIR CURTAINS are intended for installation in shops, office structures, lodgings and restaurants doorway. They discharge a curtain of air, which adequately shut out external air. Use them to keep out creepy crawlies, unpleasant scents, and residue from indoor where countless individuals pass in and out. These air curtains also forestall air escaping from an air-adapted room.CONDITIONS OF USE:Please Don't install the nuit under after conditions: