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.