FILTER-ON units & equipments work on the principle of two-stage electrostatic precipitation. It consists of plate type electrodes across which high voltage electric field is applied. Also it has two sections i.e. Ionization Section & Collection Section. When the air stream passes through ionization section, the particles in air are ionized and are charged positively, due to high voltage electric field.

When positively charged particles enter collection section, these are repelled by positive electrode and are attracted to negative electrode. These particles get neutralized on negative electrode and remain deposited on the negative electrode plate. Thus the particles are separated from air stream and air filtration is achieved.