The Honeywell QuietClean Tower Air Purifier captures up to 99% of ultra fine particles such as smoke, dust, pollen, mold spores and pet hair and dander. It also traps odors and VOC's. It comes with a Permanent Washabe ifD filter and an installed Washable Pre-Filter (which should be cleaned every 3 months). The permanent, washable filters offer lasting use and simple maintenance. It also includes another option for the Pre-Filter: an Odor Reducing Pre-Filter, which is not washable and needs to be replaced every 3 months. It's quiet operation enables use while others are sleeping, watching TV or working. It circulates room air 5 times every hour and has electronic push button controls, along with a dimmer feature to simplify operation. 1) Three air cleaning levels, 2) Optional oscillation helps circulate fresher, cleaner air through the room, 3) Electronic filter clean/change indicator, 4) The easy, reach-through handle makes it easy to move from room to room, 5) ENERGY STAR qualified, 6) AHAM Verifide CADR: Smoke -110, Dust - 100, Pollen - 132. Black.