Small Office Air Purifier Works to reduce odors, dust, smoke, pollen, germs, mold, bacteria, viruses, pet dander, dust mites and much more Area Model runs super quiet and requires no filter replacement Area Model purifies air in an area up to 800 sq. ft. Unlike typical air purifiers that offer 1 or 2 mechanisms of reducing pollution, this area model has 4 mechanisms to reduce indoor air pollution. The majority of air pollution comes from contaminated surfaces and fabrics. The efficient area model not only reduces pollution from the air, but also helps decrease pollution embedded in walls, ceilings, floors, carpets, furniture, clothing, and on countertops and other surfaces.