Envion Therapure TPP240 Permanent HEPA Type Air Purifier REMOVES mold, smoke, germs, bacteria, viruses, common allergens, pet dander, odor &amp; chemical gases from the air in your home CLEANS the air in medium to large size rooms (about 350 square feet) up to 3x in one hour CADR : Pollen  155, Dust  132, Smoke  137 IONIZES the air in your home to help trap airborne particles &amp; more efficiently clean the air. CLEANABLE filter eliminates needs for costly filter replacement.