Smart Air Purifier 4 Pro FilterThree-layer high-efficiency filtration to protect your health
PM2.5 and pollen filtration |Pet hair filtration |Odour elimination
Can only be used with Xiaomi Smart Air Purifier 4 Pro
*Recommended to replace the filter every 6–12 months.
All-in-one powerful filter
Clean air outputs after layers of purificationA 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° large particles blockingThe 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 24000cm² high-efficiency filter* removes PM2.5, pollen etc. to output consistent clean air.
0.1μm
0.3μmPM2.5
Pollen
Pet dander
High-quality activated carbonThe 650000mg high-quality activated carbon*, with the sophisticated porous structure and evenly distributed carbon, effectively removes air pollutants and odour that are harmful in your home.
Pet odours
Cigarette smell
VOC
Cooking fumes
Other odours
The difference between Xiaomi's High Efficiency Filter and 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
HEPA filter is made of dense fiberglass to trap particles, which means that less clean air get through the filter.
Xiaomi's filter integrated melt-blown PP fibers with electrostatics technology equipped with bigger fibers space, which enables a large volume clean air to get through the filter.
Noisy
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 fibers filter is easy to have the air passed even in a high speed, which results in much lower noise.
Higher energy consumption
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 a less dense fibers filter, Xiaomi's filter consumes less energy to achieve the same volume clean air.
Just one filter for up to one year's usage
Everyday freshness with a long-lasting filterAlthough the all-in-one filter is durable, the performance may gradually degrade over time. It is recommended to replace the filter every 6–12 months.
Mi Home/Xiaomi Home app connectivity
Filter replacement reminders on smart devicesYou can view the filter usage at any time on the Mi Home/Xiaomi Home app which estimates the filter replacement time based on your use.
*99.97% elimination of 0.3μm particles: According to China Testing & Inspection Institute for Household Electric Appliances Inspection Report (No. WCv-21-40115), the filter material used for this product achieved a filtration efficiency of 99.97% for particles ≥ 0.3μm.*24000cm² high-efficiency filter: The surface area of filter paper used on the Xiaomi Smart Air Purifier 4 Pro high-efficiency filter is 24000cm². Data from Smart Mi Lab, and may vary slightly due to differences between individual products.*High-quality activated carbon content of 650,000mg: The activated carbon content of the filter used on Xiaomi Smart Air Purifier 4 Pro is 650,000mg. Data from Smart Mi Lab, and may vary slightly due to differences between individual products.