Xiaomi Smart Air Purifier 4 Pro – Large-Room Air Purifier

The Xiaomi Smart Air Purifier 4 Pro is a large-room air purifier with a particle CADR of up to 500 m³/h, designed to clean the air in living rooms, big bedrooms and offices quickly and quietly. It combines a three-stage filter, a PM2.5/PM10 laser sensor and an OLED display in a tall floor-standing body.

It suits families in dusty or high-pollution cities, allergy-conscious households and pet owners who want clean air without constant noise. See more devices in our Xiaomi & Redmi range.

Key Features of Xiaomi Smart Air Purifier 4 Pro

500 m³/h Particle CADR

The 4 Pro outputs up to 8,330 litres of clean air per minute at maximum output and covers an effective area of 35–60 m². Based on Xiaomi's formula (room area × room height ÷ CADR, assuming a 3 m ceiling), a 30 m² bedroom is purified in about 11 minutes and a 40 m² living room in about 15 minutes.

Three-Stage Filtration

A primary filter, Xiaomi's High Efficiency Filter and an activated carbon filter work together to remove 99.97% of 0.3 μm particles. The High Efficiency Filter paper has an area of 24,000 cm² and the carbon stage contains 650,000 mg of activated carbon. It targets pet hair, dander and odours, pollen, dust, smoke, cooking fumes, VOCs, formaldehyde and toluene, and also airborne bacteria and H1N1 virus.

Why Not Conventional HEPA?

The High Efficiency Filter uses electrostatic and mechanical filtration with melt-blown PP fibres. Xiaomi states it delivers more airflow, less noise and lower energy use than conventional HEPA at the same cleaning efficiency. Filter life is 6–12 months, with replacement reminders.

Dual Laser Sensor and Auto Mode

A PM2.5/PM10 dual laser sensor detects coarse particles such as pollen, ash and pet dander as well as fine PM2.5. In Auto mode the fan speed follows real-time air quality, shown on the OLED display and a colour-coded light strip.

Quiet Night Mode

Night mode runs as low as 33.7 dB(A) with the display off, making it suitable for bedrooms. Maximum noise is rated at ≤65 dB(A).

Smart and Easy to Maintain

Control it from the Xiaomi Home app with timers, adjustable settings and a child lock. Negative air ionisation is included. Alexa and Google Assistant need separately sold smart voice devices. A magnetic door makes filter changes easy, and a removable screwed-in top grille lets you clean the air ducts and fan blades. The body is weather-resistant ABS and the intake is 360°. It carries TUV Rheinland Allergy Care Certification.

Build routines with a Xiaomi Smart Plug 2 or keep an eye on the room with a Xiaomi Smart Camera C500 Pro.

Xiaomi Smart Air Purifier 4 Pro Specifications

Xiaomi Smart Air Purifier 4 Pro vs 4 Compact vs 4 Lite

For smaller rooms see the Xiaomi Smart Air Purifier 4 Compact.

Why Buy Xiaomi Smart Air Purifier 4 Pro from Dynsol.pk?

• 100% genuine Xiaomi products
• Competitive prices in Pakistan
• Fast nationwide delivery with Cash on Delivery options
• Trusted electronics retailer since 2016
• Physical store at LG 54, Hafeez Centre, Gulberg III, Lahore
• Secure checkout and reliable customer support
• Original accessories and warranty handling

Pair it with the Xiaomi Robot Vacuum H50 for cleaner floors and cleaner air.

Frequently Asked Questions

What room size is the 4 Pro suitable for?

The effective coverage is 35–60 m², which suits large bedrooms, living rooms and offices.

How often should I change the filter?

Typically every 6 to 12 months, and the app sends replacement reminders.

Is it quiet enough for a bedroom?

Yes. Night mode runs as low as 33.7 dB(A) with the display off.

Does it remove smoke and cooking odours?

Yes. The activated carbon stage targets cooking fumes, odours, VOCs and formaldehyde, and the filter captures smoke particles, dust and pollen.

Can I control it by voice?

Through the Xiaomi Home app, and Alexa or Google Assistant with separately sold smart voice devices.