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. This AV-P152-RF4PACK True HEPA Replacement Filter is designed for use in AV-P152 Arovec True HEPA Air Purifier. Using high efficient air cleaner filters and replacing the filters regularly will help optimize air cleaning performance. Replace your True HEAP Filter every 6 months depending on your environment. This True HEPA Filter traps 99.97% of airborne irritants that pass through the filter including Pollen, dust, mold spores, pet dander, smoke, odors and more.