The Honeywell QuietClean Tower Air Purifier features high efficiency air cleaning with permanent, washable filters, saving you money on expensive replacement filter costs. The HFD-120-Q distances itself substantially by properly utilizing IFD filters that trap particles without interrupting and disrupting the flow of air. In terms of performance, this air purifier has outstanding value and is capable of circulating the air up to 5 times every hour. This sleek and highly portable tower air purifier effectively and quietly entraps a variety of harmful indoor particles such as dust, pollen, pet dander and tobacco smoke from the air passing through the filter. Energy Star rated and certified, this product features patented washable filters that can be easily rinsed. A boosted oscillation allows for extended coverage and is capable of servicing large rooms. The overall particle reduction is dependent on many factors. These include the amount of air processed, pollutant type and pollutants introduction rate.