The Holmes® aer1 Tower Air Purifier with HEPA-Type filter captures particles as small as 2 microns and operates quietly to remove up to 99% of airborne particles such as pollen, dust, mold, pet dander, and smoke, providing relief from odor and irritants in the air so you can breathe comfortably. The optional ionizer ensures particles are more easily captured while also tackling odors. The Holmes® aer1 Tower Air Purifier also offers 30% better dust elimination than before, and you can see the particles being accumulated through the Visipure filter window. The space-saving design easily fits in any corner of the room leaving clean and crisp air all around your home.