Name: Xiaomi Smart Air Purifier 4
Brand: Xiaomi
SKU: 16921
Availability: InStock

Powerful Purification & Advanced Air Quality Features

2.1dB(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

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

Smoke
Dust
Dander
Pollen
Pet hair
Cooking fumes
Pet odours

Fast & Efficient Air Purification

Purification Speed: Purify a large 20m² room in approximately 10 minutes*
High Particle CADR: Up to 400m³/h, delivering 6660L of purified air per minute*
All-Round Air Intake: 360° design ensures whole-room air purification effortlessly
Effective Coverage Area: 28–48m²

Three-in-One High-Efficiency Filtration

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

Premium Filter & Certified Allergen Protection

Primary Filter: Xiaomi’s High Efficiency Filter with high-quality activated carbon
Certified Protection: TÜV Rheinland Allergy Care Certification ensures strict allergen filtration
Proven Performance: Effectively filters out allergens to keep your indoor air healthy and safe

Advanced Air Purification System:

Protection for those prone to allergiesPollen filtration

A hero for animal loversPet hair and dander filtration
Powerful Airborne Pathogen Protection

Xiaomi Smart Air Purifier 4 can effectively reduce H1N1 virus in the air۔
Xiaomi Smart Air Purifier 4 can effectively reduce Escherichia coli, Staphylococcus aureus and Klebsiella pneumoniae subsp pneumoniae in the air

Fresh Air with High-Quality Activated Carbon

Activated carbon has a high absorption 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

2.5× Capability Of Formaldehyde Removal

Powerful filter eliminates harmful gases like formaldehyde and toluene from your home, bringing cleaner, fresher air. FCADR: 150 m³/h.

Negative Air Ionization

Your purifier releases negative ions to keep the air fresh, helping you stay refreshed after a hard day’s work.

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.

Expanded area of high-efficiency filter

22000cm²

High-quality activated carbon

500000mg

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 sensorsDetect particles as small as 0.3μm

Smart control 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 support

Activate your purifier with your voice.

How To Command?

Ok Google, Turn on the Air Purifier
Alexa,Turn off the Air Purifier

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.Precautions: Make sure the device is switched off before taking any of the following actions.

Steps For Cleaning:

Step 1: Unscrew and remove the grill.

Step 2: Using a soft cloth, clean the air ducts and the fan blades.

Screw the grill back into place.

Pick it up, put it down.

Compact and portable.

Easy open and close.

Magnetic-door design.

Durable Weather-resistant ABS body.

Difference Between Conventional HEPA filter and Xiaomi’s High Efficiency:

Feature	Conventional HEPA Filter	Xiaomi High Efficiency Filter
Filtration Technology	Mechanical filtration	Electrostatic + Mechanical filtration
Particle Removal	Up to 99.97% of 0.3 μm particles	Up to 99.97% of 0.3 μm particles
Captures	Dust, pollen, pet dander, smoke	Dust, PM2.5, pollen, pet dander, smoke, tiny particles
Airflow & Noise	Standard airflow, higher noise	More airflow, lower noise
Energy Consumption	Standard	Lower energy consumption

Air Quality:

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

Less clean air

Noise:

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

Noisy

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

Low noise

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.

Higher energy consumption

Thanks to a less dense fibers filter, Xiaomi’s filter consumes less energy to achieve the same volume clean air.

Lower energy consumption

Product Performance & Specifications

Filter Media Performance: Tested by China Testing & Inspection Institute for Household Electric Appliances (Report No. WCv-21-40119). Results may vary depending on test environment and parameters.
Particle CADR: 400 m³/h. Tested based on GB/T 18801-2015 standard (Report No. WCk-21-50475).
Purified Air Output: 6660 L/min at maximum output, calculated from PM CADR.
10-Minute Purification: Single-cycle purification for a 20 m² living room with 3 m ceiling height, at maximum output.
Effective Coverage Area: 28–48 m² (Report No. WCk-21-50475).
Particle Removal Efficiency: 99.97% of 0.3 μm particles, tested per GB/T 6165-2021 (Report No. WCv-21-40115).
High-Efficiency Filter Surface Area: 22,000 cm² (Smart Mi Lab; may vary slightly).
Activated Carbon Content: 500,000 mg (Smart Mi Lab; may vary slightly).
Low-Noise Night Mode: 32.1 dB(A) (Report No. WCk-21-50475).
Smart Features: Supports Alexa and Google Assistant voice control (requires compatible devices, sold separately).

FEATURE PRODUCTS

Xiaomi Smart Air Purifier 4

Price Summary