(Electrostatic Precipitator): Basically, air is drawn through an electrical field. As the particles in the air pass through the electrical field, an electronic charge is given to them. The charged particles are then attracted to a series of flat plates with an opposite electrical charge. Effectively removes many particles from the air, such as allergens, fine dust particles, some bacteria and viruses, chemical fumes and other ultra-fine particles. This process usually causes a small amount of ozone to be created.