Industrial Purpose Air Curtain is designed to prevent the loss of cool or conditioned air and the entry of hot contaminated air. The Air Curtain prevent warm air infiltration in cold shops and door less reach-in refrigerated cases and keeps out fumes, dust, harmful insects, maintaining a clean environment. The Industrial Purpose Air Curtain comes in sizes from 600 X 225 X 225 to 1200 X 250 X 250 mm.