Perfect for medium to large rooms. Air purifier effectively reduces allergens, pollution, smoke and odors, while the UV light helps reduce airborne germs & bacteria. Photocatalyst filter helps reduce fumes and chemicals. Permanent HEPA-type filter removes airborne particles as small as 0.1 micron. Ionizer with a separate on/off button to freshen the air. Air Cleaner Machine Type: HEPA Type; CADR: 151 (Dust); 159 (Pollen); 152 (Smoke); Maximum Room Size (Square Footage): 183 sq ft; Maximum Room Size: Medium to Large.