Holmes LifeLong Filter HEPA Type Air Purifier, HAP1200-U PERMANENT HEPA type filter removes up to 99% of airborne particles Air purifier with space saving tower design for rooms up to 170 square feet Traps smoke, dust, pollen, mold spores, and pet dander; CADR of 110 3 speed settings; optional ionizer; washable pre-filter Measures 11-1/5 by 8-1/2 by 28-8/9 inches