Combining true HEPA filtration and unique and powerful engineering, the Allergy Pro™ Professional Air Purifier makes it easy and affordable to maintain an allergen-free environment. Allergy Pro™ true HEPA filtration captures 99.97% of pollen, dust, pet dander, mold and smoke down to 0.3 microns. Air Cleaner Machine Type: True HEPA; CADR: 156 (Dust); 197 (Pollen); 137 (Smoke); Maximum Room Size (Square Footage): 212 sq ft; Maximum Room Size: Medium to Large.