MEROSS | Smart Air Purifier Filter Element | MHF1003 Stage H13 True HEPA Filter: With the activated carbon filter, meross air purifier captures catches 99. 97% of particles at 0. 3 microns, removing pet dander, hair, pollen, odors, smoke, VOCs and other hazardous substances in air. Filters Lifetime: The replacement filter should be replaced every 3 6 months depending on the environment and usage frequency. Meross app will send you notifications when the filter life cycle comes to under 20%,10% and