* Electrostatically-charged dust collection grid traps particles & pollutants like a magnet. Simply wipe clean when dirty. * Long-lasting, high-efficiency HEPA filter - most effective way to capture dust and allergens. * Activated carbon filter traps chemicals, gases and odors. * Germicidal UV lamp destroys micro-organisms. * Air-cleaning negative ions are circulated throughout the room. Completely safe (virtually no ozone), and scientifically proven to be effective and to enhance filter efficiency. * The washable pre filter does not require replacement, and enhances the durability and performance of the other filters. * The photocatalytic (TiO2) filter help eliminate VOCs, gases and micro-organisms.