1)With HEPA,Anion,Healthy wind 2)Fan,4speed,nanometer activity ion 3) ... dust.For the room dust ,we select HEPA (high efficiency particulate air filter) as the best HEPA material which internationally accepted, it is ... clean place. It can clean 99.7% dust ,and can filter almost 100% for smoke and gasoline.2. active carbon deodorization ...