Featuring HEPA filtration, this air purifier has been engineered to help capture up to 99.97% of microscopic airborne allergens and particles such as dust, pollen, pet dander, dust mite debris and smoke. The activated carbon pre-filter helps capture large airborne particles and reduces odors and VOCs. The HPA5100's effective design and filtration can circulate and clean the air an amazing 4.8 times per hour in a medium-large 190-square foot room. Additional optional enhanced odor and VOC filters can be purchased separately, to help tackle specific household odors and VOCs from pets, kitchens, smoke or home renovation. Air Cleaner Machine Type: HEPA; CADR: 125; Maximum Room Size (Square Footage): 190 sq ft; Maximum Room Size: Medium.