InvisiClean True HEPA Replacement Filter - IC-7028-Filter - Compatible IC-7028 Genuine InvisiClean TRUE HEPA Replacement Filter Compatible with InvisiClean IC-7028, Germ Guardian AC5000E, AC5250PT, AC5300B, AC5350W, AC5350B, PureGuardian Model AP2800CA, Black & Decker BXAP250, and Lowe's Idylis Model IAP-GG-125 True HEPA Filter with Charcoal Pre-Filter Included Reduces 99.97% of Dust, Pet Dander, Mold Spores, Odors, Smoking Odors and More Filter Usually Needs to be Replaced Every 6-12 Months Depending on Use