Holmes True HEPA Allergen Remover Mini Tower Air Purifier for Small Spaces, White TRUE HEPA FILTRATION: Filter helps remove up to 99.97% of dust, smoke, pollen, odors, mold spores, and pet dander from the air passing through it, filtering particles as small as 0.3 microns to help provide cleaner air for your home or office; uses any HolmesAer1 Series Filter including Total Air, Allergen Remover, Odor Eliminator and Smoke Grabber; and includes one Aer1 filter CONVENIENT FEATURES: A low motor setting, advanced blade, and specially designed True HEPA filter allow continuous quiet operation without interruption; also includes a filter monitor to indicate when it's time to change your filter for optimum performance, and features 3 cleaning speeds OPTIONAL IONIZER: The optional ionizer naturally improves the performance of the air purifier while freshening the air SLIM TOWER DESIGN: This space-saving air purifier has a slim design and is recommended for rooms up to 80 square feet, so it's perfect for bedrooms, family rooms, living rooms or offices 3-YEAR LIMITED WARRANTY: This product comes with a 3-year limited warranty from Holmes Air purifier with space saving tower design for rooms up to 80 square feet True HEPA filter removes up to 99.97% of airborne particles Traps smoke, dust, pollen, mold spores, and pet dander; CADR of 55 3 speed settings; optional ionizer; washable pre-filter; quiet operation Measures 11-2/5 by 8-1/5 by 15-2/3 inches; 5-year limited warranty