JH01 filter has an outstanding purification performance for it consists of 3 layers – (from outside to inside) fine pre-filter, antibacterial cloth and effective HEPA filter. It can filter particles as small as 0.3 microns and air pollution of PM 2.5, eliminating 99.97% tiny objects in an indoor environment of 215 square feet. One filter can be used for up to 2000 hours, and with easy steps, the replacement process only takes you a few minutes .