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Placing an air curtain above or to the side of the entrance , covering the full door that maximizes performance by stopping heated air escaping in winter and cooled air escaping in summertime, as well as reducing energy losses, creating a comfortable indoor climate and preventing cold draughts
In some stores, fans which are placed above the doors, with low heater capacity and airflow rate, called
" door heater " can only heat that area. But thanks to powerful air flow, air curtains can prevent heat loss and provide energy efficiency. To get maximum efficiency from air curtain, air should be balanced in place. If the place has negative or positive pressure, air curtain can not prevent air loss from indoor, but can heat the air that comes from outside and cover indoor comfort conditions.