Oreck XL Electrostatic Air Purifier / Sterilizer/ Ionizer Perfect for home or office use, this purifier can handle a variety of conditions. This unit incorporates a Permanent Filter that Never Needs Replacing and will completely regenerate the air in a 30'x 30' room every hour. Simply wipe down the metal with a cloth and reuse. The unit has a powerful fan which utilizes Oreck's silence technology to stay relatively quiet to other air purifiers of its class. The fan also aids by helping to quickly and effectively disperse aromas when used with the fragrance adapter. This unit will capture and destroy pollutants such as bacteria, mold, viruses, and fungi, as well as remove pet hair, pet dander, dust mites, and common household dust and pollen.