Conventional HEPA filter
Xiaomi's High Efficiency Filter
![Xiaomi Smart Air Purifier 4 Pro Filter]()
Less clean air
![Xiaomi Smart Air Purifier 4 Pro Filter]()
More clean air
HEPA filter is made of dense fiberglass to trap particles, which means that less clean air gets through the filter.
Xiaomi's filter integrated melt-blown PP fibers with electrostatics technology equipped with bigger fibers space, which enables a large volume of clean air to get through the filter.
![Xiaomi Smart Air Purifier 4 Pro Filter]()
Noisy
![Xiaomi Smart Air Purifier 4 Pro Filter]()
Low noise
Large volume air is forced to get through a dense HEPA filter, requires higher fan speed, which will generate higher noise.
Less dense filter allows air to easily pass even at high speeds, which results in much less noise.
![Xiaomi Smart Air Purifier 4 Pro Filter]()
Higher energy consumption
![Xiaomi Smart Air Purifier 4 Pro Filter]()
Lower energy consumption
In order to get more clean air, HEPA filter requires the motor to run at a higher speed, which causes higher energy consumption.
Thanks to less dense fibers, Xiaomi's filter consumes less energy to achieve the same volume of clean air.