The Ac-2102 features a Four-Stage filter assembly: Activated Carbon filter, Hepa filter, Voc filter and TiO2 filter with Uv Light . Targeted to effectively remove smoke, dust, pollen, PM2.5, bacteria, mold and virus in a 1,000 cu.ft. space. Both Hepa and Voc filters are designed to operate continuously for up to 2,000 hours.