Air Supply is not a filtration device, and no parts need to be replaced or serviced. The same technological principles have only recently been miniaturized to allow for personal, portable use. Air Supply is a corona discharge device. An ionizer uses electrostatic precipitation to negatively charge particles. Although a corona discharge device has an ionization effect internally, it uses an electronic plasma incineration, similar to a lightning strike, to destroy airborne contaminants.
Corona discharge is able to destroy many more airborne contaminants than traditional ionization.
The negative ions which are generated internally are neutralized by the neutral grid of the Air Supply before the purified air is emitted to the users face. Although the Air Supply does emit low levels of ozone, it is not classified as an Ozone Generator. I feel a slight breeze of air coming from my unit. No, there is not a fan. Air Supply's negative corona discharge sets up a powerful, electrodynamically driven airflow, drawing pollutants into it and ejecting purified air at a velocity of over 75 feet per minute.