Xiaomi Smart Air Purifier 4 Filter

Three-layer high-efficiency filtration to protect your health
PM2.5 and pollen filtration| Pet hair filtration| Odour elimination

All-in-one powerful filter Layers of purification for clean air output
A primary filter, Xiaomi's High Efficiency Filter and a high-quality activated carbon filter work together to purify your air and keep you healthy.

Primary Filter 360¡ blocking of large particles

The primary filter provides an initial filtration by filtering dust, hair, fine crumbs among other large particles and is resistant to creases, oil, acids, alkalis and more to ensure a long service life.
Dust
Fine crumbs
Pet hair
Cotton fibers

Xiaomi's High Efficiency Filter 99.97% filtration of 0.3_m particles*

The 22000cm_ high-efficiency filter * removes PM2.5, pollen etc. for consistent clean-air output.
0.1_m
0.3_m
PM2.5
Pollen
Pet dander

High-quality impregnated activated carbon Powerful odour adsorption

The 500000mg high-quality activated carbon*, with the sophisticated pore structure and evenly distributed carbon, effectively removes air pollutants and odour that are harmful in your home.
Pet odours
Cigarette smoke
VOC
Cooking fumes
Other odours

The difference between Xiaomi's High-Efficiency Filter and a conventional HEPA Filter

Combining two filter technologies: Electrostatic charge and mechanical filtration, Xiaomi's High Efficiency Filter media can remove 99.97% of airborne particles of 0.3 micrometers in size and traps dust, PM 2.5, pollen, pet dander, smoke and tiny particles. Compared to a conventional HEPA filter, Xiaomi's High Efficiency Filter allows the air purifier to generate less noise and consume less energy by allowing more airflow to pass through the filter all the while keeping the same cleaning efficiency.