One of the most advanced air purifiers on the market, the Neoair Enviro sets itself apart with a five-stage filtration structure featuring Neoair’s exclusive Advanced O.F.S. (organic fiber sterilization) Filter that traps and kills bacteria. In addition, a multi-function digital console keeps you informed of pollution levels in the room and informs you when your HEPA filter needs to be replaced. Another benefit of the Enviro is its energy-conserving design. This powerful air purifier uses only 25-39 watts, less than most standard light bulbs and less than any other air purifier in its class.