Oreck AIRPCS Professional Permanent Filter Air Purifier with Optional Ionizer and Quiet Operation, Silver Effectively cleans the air in your home with stages of filtration to capture and destroy allergens, bacteria, viruses, molds, fungi, odor, pet dander, Vacs and other particles down to 1 microns The optional ionizer provides Extra freshness to your home by allowing smaller airborne particles to clump together and become easily trapped by the filter With no expensive filters to replace, maintenance is easy with a washable, Lifetime filter that alerts you when it's time to be cleaned The 3-speed, tabletop design is great for small rooms such as bedrooms, offices, and dens Combines the perfect balance of high performance, quiet operation, and energy efficiency requiring less energy than a standard light Bulb