Envion Therapure TPP440 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 POWERFUL UV GERMICIDAL LIGHT kills airborne bacteria, germs, and viruses, and helps reduce fumes and chemicals, including VOC's found in paint and carpet fumesCLEANS the air in medium to large size rooms (about 400 square feet) up to 3x in one hour CADR Rating: 158/141/158 FEATURES a 3 speed fan, UC/VOC on-off and LED Display/dimmer CLEANABLE filter eliminates needs for costly filter replacement.