Initiative trio-ultrafiltration system: the deluxe filter group consists of 3 filters, including 2 in 1 H13 Dual Filter( Pre-filter & H13 HEPA Filter), 2 in 1 Nanois Filter(Nano Ionic Silver Filter & Premium Filter), and Honeycomb Activated Carbon Filter, which comprehensively remove nearly all harmful substances such as pollen,dust and absorb toxic gases like formaldehyde, benzene, TVOC boomingly.