An air curtain is a fan-powered device that creates an invisible air barrier over the doorway to separate efficiently two different environments, without limiting the access of the people or vehicles.

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The energy-saving air screen reduces heating and cooling costs up to 80% while protecting the internal climate and increasing people's comfort. It keeps the atmosphere clean from pests and insects, dust, airborne pollution, smell, odour and stops cold or hot air entrances. The functioning of an air curtain is based on high-velocity jets.