Air curtains while maintaining the quality of the air in the internal environment will also prevent the entry into the indoor air quality will come from the external environment. This process achieves this through my curtains that blow air a certain speed; hot air, cold air, exhaust air, enables penetration of unsru environment such as dust and fly. Mounting the horizontal and vertical air flow according to the form are specific speed airflow blower device.air curtains are used in cold storage, avoiding the unnecessary heat losses during loading and unloading, and allows you to work less cooling devices, as well as prevent unnecessary energy consumption.