"Micro Cooling Fan" using a special motor with die-cast aluminum housing, protection class highest level IP12. The motor can be used continuously 2400 / hour uninterrupted power. Shell is made of FRP (FRP) material, light weight, insulation, no rust, no aging, moisture, acid, durable, long service life. "Micro Cooling Fan" shape using unique channel flow technology, water, rain. Special motor, direct-type structure maintenance (change the traditional belt drive) improve the functionality, simplify the structure, reduce maintenance costs. Air downstream principle shutters, no power, no switch, and can effectively prevent the intrusion of rain. "Micro Cooling Fan" Planning installation takes up no space, no duct can be installed in any place. Exhaust ventilation in work areas: installed outside shop window, usually selected downwind, to the external louver suction fan ventilation, extraction smell, hot air; general factories used more often.