AROVEC Apex300 Replacement Filter[Genuine Filters] It is highly recommended to use the original Arovec replacement filter (Apex300 RF) to keep your Apex300 air purifier at its best working efficiency and capacity, breathe clean & fresh air all the time. [Efficient Filtration] The 3 stage filtration system, including an H13 True HEPA filter, activated carbon filter, and pre filter removes up to 99. 97% of airborne pollutants, including PM2. 5, allergens, dust, bacteria, pollen, pet