Ideal for Homes with Pets: HEPA + Pet Pure™ Treatment Filter: HEPA filter captures 99.97% of allergens including pet dander, dust mites and pollen. The Pet Pure™ is an antimicrobial agent added to the filter to inhibit the growth of mold, mildew and odor-causing bacteria on the surface of the filter.Reduces Odors: Charcoal filter reduces common odors from pets, smoking and cooking.Fights Germs: Optional UV-C light technology works with Titanium Dioxide to reduce airborne bacteria, viruses, germs and mold spores.AHAM Verified and Energy Star Certified: 22 inch 3 speed tower is best used for rooms up to 153 Sq. Ft. Filters and circulates room air over 4x per hour. The higher the CADR the faster the unit filters the air. CADR Dust (107), Pollen (116) and Smoke (99).Filter Replacement Indicator: Only one single filter needs to be replaced every 6-8 months depending on the use of the product; Replacement filter is filter B Pet (model FLT4850PT). To lengthen the life of your filter, a 4 pack of the carbon filters is also available (model FLT22CB4). UV-C Replacement Bulb LB4000. IMPORTANT: Use genuine Guardian Technologies replacement parts to maintain product performance. 3 year limited manufacturer warranty.