The Ionic technology operates silently, starting with the generation of a stream of negative ions into the surrounding air. These negative ions attach and statically charge airborne allergens and particles. These charged particles are then attracted to the oppositely charged metal collection plates. As a result, a clean and fresh stream of air is reintroduced into the environment. The TA550 offers exceptional ease of cleaning and removes the necessity of regularly changing filters.Find the AIR PURIFIER BLACK 120V at Ace.