The sharp plasma cluster ion air purifier with true HEPA filtration effectively reduces pollen, dust, pet dander, smoke, germs, bacteria, viruses, odors, mold, and fungus in your living space up to 280 square feet. It has a Three-Stage filter system including a back panel micro-mesh Pre-Filter, deodorizing non-washable active carbon filter and long-life true HEPA filter, which captures 99.97percent of particles as small as 0.3 microns from the air that passes through it. Patented plasma cluster ion technology disperses positively and Negatively charged ions throughout the room to safely break down microorganisms and odors (even those trapped in fabric, carpeting, and drapery!). this is the ideal solution for allergy sufferers, asthmatics, pet owners, and smokers, and is best used in a bedroom, living room, study, or exercise room. The unit has library quiet operation and is energy star rated, so you can run the unit continuously while saving money and energy.