SHARP IG-A20E-W Air PurifierOverview Plasmacluster technology: Plasma discharge generates and emits the same positive and negative ions that occur in nature. Plasmacluster technology is Sharps original air disinfecting technology that inactivates suspended airborne mold and viruses. Sharps Plasmacluster is the only technology uses positive and negative ions to disinfect the air. High density and long lasting ions make a powerful attack on dirty air across the entire room.