32.1dB(A) low noise*
Filter replacement reminders
48m² large* effective coverage area
99.97% filtration of 0.3μm particles*
Dust and pollen filtration
Negative Air Ionization
Effectively reduce H1N1 virus in the air
150m³/hFCADR
Impressive CADR Purify a large 20m² room in approx. 10 minutesXiaomi Smart Air Purifier 4 has a Particle CADR of up to 400m³/h*, able to deliver 6660L of purified air per minute*, and with 360° all-round air intake, whole-room air purification is effortless.
Able to purify a 20m² room in approx*
10min
Effective coverage area of
28-48m²
Just one filter for up to one year’s usage Everyday freshness with a long-lasting filterThe filter is highly efficient with a large surface area and high content of high-quality activated carbon. Long-lasting filter performance means less replacements, with one filter lasting 6-12 months.
Expanded area of high-efficiency filter*
22000cm²
High-quality activated carbon content*
500000mg
Filter replacement remindersLink to the Mi Home/Xiaomi Home app and simply change your filter when recommended
Voice-control supportActivate your purifier with your voice*
Ok Google, Turn on the Air Purifier
Alexa,Turn off the Air Purifier
Fresh and clean
Low pollution
Moderate pollution
High pollutionLow-noise 32.1dB(A)* Night Mode For a good night’s sleepSwitch to Night Mode to turn off display luminance for no-glare, no-noise purification. Your purifier will keep air circulating, providing you with the perfect environment for some undisturbed naps.
Easy-clean air ducts Clean your purifier from the inside outUnscrew and remove the grille for easy access to the fan blades and air ducts. Easy cleaning for the inside of your purifier to prevent secondary pollution.
*Make sure the device is switched off before taking any of the following actions.
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.
*The filter media performance is tested by China Testing & Inspection Institute for Household Electric Appliances (Report Number: WCv-21-40119). Due to the technical specifications of the filter media, the test environment and parameters may differ.
Pet hair
Pollen
Dust
Smoke
Dander
Cotton fibre
Protection for those prone to allergiesPollen filtration
A hero for animal loversPet hair and dander filtration
Xiaomi Smart Air Purifier 4 can effectively reduce Escherichia coli, Staphylococcus aureus and Klebsiella pneumoniae subsp pneumoniae in the air 
Pet odours
Cooking fumes
VOC
Formaldehyde, toluene
Other odours
Real-time monitoring for timely feedback
Automatic optimisation of purification speed
Remote control
Timed on/off
Adjustable settings
Air quality
Child lock
Filter-replacement monitoring
Favourite mode
Night mode
Auto mode
Low
Medium
High
Fresh and clean
Low pollution
Moderate pollution
High pollution
Step 1Unscrew and remove the grille
Step 2Using a soft cloth, clean the air ducts and the fan blades
Step 3Screw the grille back into place
