Smart Air Purifier 4 FilterThree-layer high-efficiency filtration to protect your health
PM2.5 and pollen filtration|Pet hair filtration|Odour elimination
Only compatible with Xiaomi Smart Air Purifier 4
It is recommended to replace the filter every 6–12 months.
All-in-one powerful filter
Layers of purification for clean air outputA primary filter, Xiaomi's High Efficiency Filter and a high-quality activated carbon filter work together to purify your air and keep you healthy.
High-quality activated carbonXiaomi's High Efficiency FilterPrimary filter
Primary Filter
360° blocking of large particlesThe 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 0.3μm particles*The 22000cm² high-efficiency filter * removes PM2.5, pollen etc. for consistent clean-air output.
0.1μm
0.3μmPM2.5
Pollen
Pet dander
High-quality impregnated activated carbon
Powerful odour adsorptionThe 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 FilterCombining 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.
Conventional HEPA filter
Xiaomi's High-Efficiency Filter
Less clean air
More clean air
The HEPA filter is made of dense fibreglass to trap particles, which means that less clean air gets through the filter.
Xiaomi's filter uses melt-blown PP fibres with electrostatic technology. With greater space between fibres, larger volumes of air are able to pass through the filter.
Noisy
Low noise
Large volumes of air are forced through the dense HEPA filter, meaning a higher fan speed is required, which generates more noise.
With a lower fibre density, the filter allows air to pass through at high speeds, resulting in less noise.
Higher energy consumption
Lower energy consumption
In order for the HEPA filter to release more clean air, the motor must run at a higher speed, which translates into a higher energy consumption.
With a lower fibre density, Xiaomi's filter is able to release the same volume of clean air as a conventional filter, but with a much lower energy consumption.
Just one filter for up to one year's usage
Everyday freshness with a long-lasting filterThe all-in-one filter element is durable, though performance will gradually decrease over time. It is recommended to replace the filter element every 6–12 months.
Mi Home/Xiaomi Home app connectivity
Filter replacement reminders on smart devicesYou can check filter usage at any time via the Mi Home/Xiaomi Home app. The app even estimates filter replacement times based on your usage.
*The filter media performance is tested by China Testing & Inspection Institute for Household Electric Appliances (Report Number: WCv-21-40115). Due to the technical specifications of the filter media, the test environment and parameters may differ.
* 22,000cm² high-efficiency filter paper: The surface area of filter paper used on the Xiaomi Smart Air Purifier 4 high-efficiency filter is 22,000cm². Data from Smart Mi Lab, and may vary slightly due to differences between individual products.* High-quality activated carbon content of 500,000mg: The activated carbon content of the filter used on Xiaomi Smart Air Purifier 4 is 500,000mg. Data from Smart Mi Lab, and may vary slightly due to differences between individual products.