Xiaomi Smart Air Purifier 4

Xiaomi Smart Air Purifier 4

Breathe clean, breathe healthy

20m² large room purification in approx.

Smart control | OLED display

32.1dB(A)
low
noise*

Filter replacement reminders

48m² large*
effective coverage
area

99.97% filtration
of 0.3μm particles*

Filter replacement reminders

Negative Air Ionization

Air is filled with invisible
pollutants
that pose a risk to your health

Able to purify a 20m² room in approx*

10^min

All-round air intake

360°

Effective coverage area of

28-48m²

Three-in-one filtration
99.97% elimination of 0.3μm
particles*

All-day protection for those who suffer from rhinitis and allergies. Xiaomi Smart Air Purifier 4 protects your respiratory health by keeping the air in your home clean and safe to breathe.

Pet hair

Pollen

Dust

Smoke

Dander

Cotton fibre

Protection for those prone to allergies

Pollen filtration

A hero for animal lovers

Pet hair and dander filtration

High-quality activated carbon
Odour elimination for lasting
 freshness

Activated carbon has a high adsorption rate and effectively removes common harmful gases such as VOC from your home, as well as eliminating odours to keep your air fresh.

Pet odours

Cooking fumes

VOC

Formaldehyde, toluene

Other odours

Negative Air Ionization helps keep your home fresh

Your 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 filter

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.

Expanded area of high-efficiency filter*







High-quality activated carbon content*

Filter replacement
reminders

Link to the Mi Home/Xiaomi Home app and simply change your filter when recommended

One-touch Auto Mode Effective, hands-free purification

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.

Real-time monitoring
for timely feedback

Automatic optimisation
of purification speed

High-precision
laser sensors

Detect particles as small as 0.3μm

Smart control Keep your home fresh when on the move

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.

Real-time air quality with the OLED display

Intuitive indoor air-quality data with the real-time PM2.5 display and colour-coded indicator. Adjust your purification settings with the simple touch control buttons, one light touch to fulfil your air-quality needs.

Favourite mode

Night mode

Auto mode

Low

Medium

High

Fresh and clean

Low pollution

Moderate pollution

High pollution

Low-noise 32.1dB(A)* Night
Mode
For a good night’s sleep

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 for some undisturbed shut-eye.

Easy-clean air ducts Clean your purifier from the inside out

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.

Step 1

Unscrew and remove the grille

Step 2

Using a soft cloth, clean the air ducts and the fan blades

Step 3

Screw the grille back into place

Pick it up, put it down Compact and portable

Easy open and close

Magnetic-door design

Durable

Weather-resistant ABS body

The difference between Xiaomi's High
Efficiency Filter and conventional HEPA Filter

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.

Conventional HEPA filter

Less clean air

HEPA filter is made of dense fiberglass to trap particles, which means that less clean air get through the filter.

Noisy

Large volume air is forced to get through a dense HEPA filter, requires higher fan speed, which will generate higher noise.

Higher 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.

Xiaomi's High Efficiency Filter

More clean air

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.

Low noise

Less dense fibers filter is easy to have the air passed even in a high speed, which results in much lower noise.

Lower 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.

* 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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