Smart Air Purifier 4
Breathe clean, breathe healthy20m² large room purification in approx. 10 minutes
Smart control |OLED display
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
Air is filled with invisible pollutants
that pose a risk to your health
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*
Effective coverage area of
Negative Air Ionization
helps keep your home freshYour purifier releases negative ions to keep the air fresh, helping you stay refreshed after a hard day's work.
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*
22000cm²High-quality activated carbon content*
Filter replacement remindersLink to the Mi Home/Xiaomi Home app and simply change your filter when recommended
One-touch Auto Mode
Effective, hands-free purificationSensitive 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 Automatic optimisation
of purification speed
High-precision laser sensorsDetect particles as small as 0.3μm
Keep your home fresh when on the moveWith 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. Remote control Timed on/off Adjustable settings Air quality Child lock Filter-life monitoring
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 pollution
Low-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 shut-eye.
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.
Easy open and closeMagnetic-door design
DurableWeather-resistant ABS body
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.
*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.
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.
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.
* 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).*Alexa and Google Assistant voice control features require smart voice devices to function. Related connecting devices are sold separately.
* Google and its related logos are trademarks of Google LLC.
* Amazon, Alexa and all related logos are trademarks of Amazon.com, Inc. or its affiliates.
* Google Assistant and Amazon Alexa are not available in certain languages and countries. Availability of services varies by country and language.*Google is a trademark of Google LLC.*Google Assistant is not available in certain languages and countries. Please refer to official website for more information.*Amazon, Alexa and all related logos are trademarks of Amazon.com, Inc. or its affiliates.*Alexa is not available in all languages and countries. Alexa features and functionality may vary by location. Please refer to official website for more information.