ideal.’s replacement filter for the AP30/AP40 Pro air purifier is a single, easy-to-install novel smart 360° filter cartridge which locks in place. The cartridge contains a pre-filter, a true HEPA filter, and a high capacity carbon filter. The filters provide 99.97% filtration efficiency for particles as small as 0.3 microns, and removes 99.9% of pathogens, including bacteria, viruses, and mold spores, through a five-layer filtration system. Cartridges should be replaced every 12 months with average use, and the pre-filter should be wiped away of hair and dust every 2 weeks to maximize the life of all filters.