As per the scientific definition, 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. The Air curtain was an invention that reduced heating and cooling costs by up to 80% while protecting the internal climate with energy-saving air screens. Also, It keeps the atmosphere clean from pests and insects, dust, airborne, pollution, smells, odors, and stops droughts and cold or hot air entrances.
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