The Oreck OptiMax™ 94 HEPA-type Small Room Air Purifier provides cleaning power and filtration in a compact, easy-to-use, durable system. The HEPA-type filter captures 99% of dust, allergens, pet dander, pollen and smoke at 1 micron from the air that passes through its filter. Additionally, the odor filter reduces many household odors from the air that passes through its filter. Perfect for rooms up to 155 sq. ft.