This filter set fits to your AROVEC AV-P152 True HEPA Air Purifier. To keep your air purifier at its best working condition, always use only original AROVEC replacement filters. Three-stage Filtration System: 1) Fine Preliminary Filter: helps to capture pet dander, dust, hair, mold, fungi, and larger particles. Fine preliminary filter captures large particles, dust, hair, pet dander, fiber, mold and fungi. 2) True HEPA Filter: effectively removes bacteria, pollen, allergens and 99.97% of PM2.5 and all harmful fine particles in the air as small as 0.3 microns in size. 3) Activated Carbon Filter: removes volatile organic compounds (VOCs), pet, cooking and other odours, cigarette smoke, formaldehyde, benzene and other harmful gaseous pollutants from the air. Filters are sealed in the packaging to protect their life-time. Remove the filters from packaging before placing them into the air purifier. It is recommended to replace the filters every 6-months.