The HEPAClean UV Tower Air Purifier features an advanced air cleaning system that combines 3 powerful air cleaning technologies into one compact air purifier to deliver cleaner, fresher air to your home. Germ Fighting Ultraviolet Technology helps reduce viruses, bacteria, fungi and mold spores while the HEPAClean filters remove up to 99% of airborne particles such as dust, pet dander, smoke and pollen. In addition, the enhanced odor control carbon zeolite pre-filter helps reduce common household odors such as pet, cooking, nursery, and smoke odors. This air purifier will circulate and filter the air in your room up to 5 times every hour with whisper quiet performance. HEPA-Type filters help capture airborne particles that are 2 microns or larger in size from the air that passes through the filter. Based on AHAM CADR rating in recommended room size. Based on independent testing.