Small Workspace Air Purifier features a three-stage filter design that includes both Filtrete filter media and ionization for airborne particulate removal, and carbon for odor reduction. Filtrete filer media with ionization removes smoke, dust, pollen and other allergens from the air. Filter effectiveness lasts up to three months under normal conditions. Office air cleaner is designed for use with cubicles or other work spaces up 80 square feet (8' x 10'). Offers two fan speeds, filter change reminder and ionizer on/off switch.Small Workspace Air Purifier features a three-stage filter design that includes both Filtrete filter media and ionization for airborne particulate removal, and carbon for odor reduction. Filtrete filer media with ionization removes smoke, dust, pollen and other allergens from the air. Filter effectiveness lasts up to three months under normal conditions. Office air cleaner is designed for use with cubicles or other work spaces up 80 square feet (8' x 10'). Offers two fan speeds, filter change reminder and ionizer on/off switch.