Low maintenance, effective air cleaning with a long-life vacuum-able HEPA-Type filter. The 3-stage filtration system first helps clean the air by using a washable pre-filter to capture larger airborne particles. It then passes through the long-life HEPA-Type filter, capturing up to 99% of microscopic particles such as mold spores, pollen, pet dander, smoke and dust. The filtered air then enters an ionizer field providing extra cleaning and air freshening. ARB Certified to comply with the federal ozone emissions limit. AHAM certified for use in rooms up to 85 sq. ft.