Environmental Air Barriers are widely accepted across North America and Europe as a standard fitment in public buildings, retail stores and industrial applications such as coolers, freezers and cold storage facilities. Air curtains are generally associated with retaining heat energy in cold climates, and the energy savings are substantial.
Air curtains for effective insect control has a nozzle that can angle the air stream away from the area to be protected. An angle of about 20 from the vertical is usually optimal. The unit should meet or exceed UK Department of Agriculture and US Federal Drug Administration standards, which call for an air stream of 50 mm to 120 mm wide at the nozzle, capable of producing a minimum velocity of 8 m/s of air 1 m above the floor and across the entire door opening to ensure there are no gaps for the insects to enter.