Electronic Air Cleaner. A device that uses the principle of electrical attraction, like a magnet, to collect airborne pollutants. As particles in the air stream approach the unit, a pre-charging section on the EAC gives them a positive charge. The charged particles then pass between a series of alternating plates, or electrodes. One of the series of plates has a positive charge and the other has the opposite charge. The plates with the positive charge repel and deflect the particles to the oppositely charged plates, where they are attracted and collected.