New look! HEPA filter continues to reduce allergens while the new yellow frame helps you identify that it's a GENUINE HEPA Guardian technologies replacement filter.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.Charcoal filter layer reduces common odors from pets, smoking and cooking. Acts as a pre-filter to capture large dust particles, helping to extend filter life.Replacement filter for GermGuardian Air Purifier Models AC5000E, AC5250PT, AC5300B, AC5350W, AC5350B, CDAP5500 PureGuardian Model AP2800CA, Black+Decker BXAP250.Only one single combination filter needs to be replaced every 6-8 months depending on the use of the product; Charcoal replacements can be purchased separately to extend the life of your filter (Model #FLT28CB4). IMPORTANT: Use genuine Guardian Technologies replacement parts to maintain product performance.FLT5000 can be used for the following 28" tower products:GermGuardian ModelsAC5000EAC5250PTAC5300BAC5350WAC5350BCDAP5500PureGuardian Model: AP2800CABlack + Decker Model: BXAP250