The HepaClean Compact Air Purifier offers low maintenance, effective air cleaning with a permanent Hepa-Type filter. The 3-stage filtration system first helps clean the air by using a washable pre-filter to capture large airborne particles. It then passes through the permanent 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. This model is most effective in small size rooms and is ideal for the nursery, bedrooms, kitchen, office or den.