This all weather (indoor/outdoor) filtration system is capable and efficient in filtering large quantity of pollutants at high speeds. As the dusts are drawn in great volume and great velocity, the coarse particles will drop into the hopper. The finer dusts will stick around the walls of the filters very quickly. A highly charged of compress air is reverse blown inside the filters which will dislodge it into the hopper before it chokes the filers. The compressed air is connected to a series of solenoid-diaphram valves which operates at fraction of seconds by an electronic or pnuematic programmed timer. It has a built-in noise diffuser and precision built for long non-stop and enviroment friendly operations. It is economical to operate on compressed air and easy to maintain.