Traps Allergens: HEPA Filter captures 99.97% of dust and allergens as small as .3 microns such as household dust, pet dander, mold spores and plant pollens.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. Carb CompliantAHAM Verified and Energy Star Certified: 22 inch 3 speed tower is best used for rooms up to 167 sq. feet Filters and circulates room air over 4x per hour. The higher the CADR the faster the unit filters the air. CADR Dust (118), Pollen (125) and Smoke (108).Filter Replacement Reminder: Only one single filter needs to be replaced every 6-8 months depending on the use of the product; Replacement filter is filter B (model FLT4825). 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.