auto air filter with 24 hours timer is a manless air filter system that on running, suction nozzle's inlet runs from top, bottom, right and left and inhales dusts on filter of the main body and transfer dusts to the collector automatically 3~4 times a day.

for ventilation at Subway station, underg- round shopping centers, departments, usual buildings.
ventilation apparatus air filter at plants (steel plants ,chemical plants).
Wood, textile, paper manufacturer, foundry having the first collecting filters or collecting filters with high dust density.
air filter for ventilation at semiconductors plants and electronic plants