Homedics Tower Air Cleaner Replacement Filters at-OFL | 2 HEPA Filters for AT-PET01, AT-PET02, and AR-45 | Removes Up to 99.97% of Contaminants, 0.3 Micron TRUE HEPA FILTRATION: Removes up to 99.97% of airborne particles as small as 0.3 microns such as allergens, pollen, dust germs, pet dander, odor, mold spores and smoke GENUINE REPLACEMENT: Genuine HoMedics replacement HEPA filters. This product is a direct replacement for the HEPA filters in your HoMedics Tower Air Purifier LONG LASTING: 12 months between filter changes HOW TO REPLACE: For optimal performance, replace every 12 months under normal usage conditions. Once the True HEPA filters have been replaced, press and hold the REPLACE HEPA FILTER button until it beeps to reset the indicator CONTENTS: 2 HEPA Filters