CEPA* FILTER (Clair Embossed HEPA filter - H13 True HEPA): Embossed HEPA technology outperforms traditional HEPA with 13% more surface area for capturing pollutants. The PRE-FILTER captures big pollutants like hair and large dusts. The Activated CARBON filter removes the odors from pets, smoking and cooking. The built-in UV LED Sterilizer effectively reduces and cleans harmful trapped pollutants on the filters, increasing filter performance and lifespan.