Bionaire  Permanent HEPA Type Air Purifier with Germ-Fighting UV UV technology, proven to help reduce germs viruses, bacteria, mold and fungi from the air Helps remove up to 99% of airborne allergens and pollutants including: household dust, ragweed pollen, Grass & tree pollen, dust mite debris, mold spores, and pet dander. Includes three cleaning speeds to help keep the air fresh and pure. Optional Ionizer helps negative ions bind with airborne smoke, dust, pollen, to form larger particles that are more easily captured to be removed from your indoor air. Recommended for Medium Rooms up to 236 square feet. Smoke CADR152