Xiaomi Smart Air Purifier 4
Smart control | OLED display
Able to purify a 20m² room in approx*10min
All-round air intake3600
Effective coverage area of28-48m2
Pet hair and dander filtration
Your purifier releases negative ions to keep the air fresh, helping you stay
refreshed after a hard day's work.
The 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.
Sensitive high-precision laser sensors monitor changes in air quality.
High-efficiency purification in Auto Mode — your purifier monitors
real-time air quality and automatically adjusts purification speed.
for timely feedback
of purification speed
With support for smart control, ensure that you always return to a home filled with
clean, fresh air. Use the Mi Home/Xiaomi Home app from your smartphone to enable
purification when away from home.
Fresh and clean
Switch 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
Unscrew 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.
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.
*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.
* 400m³/h Particle CADR: Data from China Testing & Inspection Institute for Household Electric Appliances Inspection. Tested based on GB/T 18801-2015 standard. Report No. WCk-21-50475.
*6660L of purified air per minute: Refers to the clean air output when the product is operating at maximum output. Calculated based on the PM CADR of Xiaomi Smart Air Purifier 4.
*10min purification for a living room of approx. 20m²: In a bedroom of 20m², with a ceiling height of 3m when the device is running at maximum output, a single-cycle purification time is calculated by: room area x room height ÷ PM CADR.
*Effective coverage area of 28-48m²: Data from China Testing & Inspection Institute for Household Electric Appliances Inspection Report (No. Wck-21-50475).
* 99.97% elimination of 0.3μm particles: Data from China Testing & Inspection Institute for Household Electric Appliances Inspection. Tested based on GB/T 6165-2021 standard. Report No. WCv-21-40115.
*High-efficiency filter with a larger surface area of 22,000cm²: The surface area of filter used on the high-efficiency filter of Xiaomi Smart Air Purifier 4 was 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.
*Low-noise 32.1dB(A) Night Mode: Refers to the noise value generated when the product is in Night Mode. Data from the China Testing & Inspection Institute for Household Electric Appliances Inspection Report (No. WCk-21-50475).
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