The original Mi Air Purifier comes with dual-fans that’s capable of pushing 10,000 litres of purified air per minute with its 9 double blade design. Cleaning the air is a 3-layer HEPA filter which claims to remove 99.99% of PM2.5 particles. It has a CADR (Clean Air Delivery Rate) of 406 m3/h with an effective coverage of 48 m2.