Xiaomi Smart Air Purifier 4

Xiaomi Smart Air Purifier 4

Xiaomi Smart Air Purifier 4 is an app-connected indoor purifier with a display for checking air quality and operating status. It draws air through its filter and returns filtered air to the room. Automatic operation and app controls let you manage it around your household routine.

Manage air care in the room you use most

A purifier is most useful when selected for a specific room and used consistently there. For a bedroom, consider sleeping hours, placement and acceptable fan noise. For a living room, consider the larger air volume and whether doors are usually open. The Smart Air Purifier 4 brings an air-quality display and app control together, making it easier to check operating status without repeatedly walking over to the appliance.

Read the cleaning capacity in context

Xiaomi specifies a particle Clean Air Delivery Rate, or CADR, of up to 400 m³/h for this model. CADR describes filtered-air delivery under test conditions; it is not a promise that every room will be cleaned in a fixed number of minutes. Ceiling height, open doors, outdoor air entering the room and the selected fan setting all affect practical performance. Use the room’s dimensions when assessing whether one unit is suitable.

Choose a routine that balances airflow and sound

The display offers a local view of air-quality information, while Xiaomi Home provides connected controls. Night-time operation is useful when quieter running matters, but a quieter setting should not be assumed to deliver the maximum published airflow. Choose an operating routine around actual room use and review it when conditions change. App features also depend on the supported account, network and regional configuration.

Plan filter replacement as part of ownership

A purifier’s filter is a consumable, so ongoing availability matters alongside the appliance itself. Follow the manufacturer’s replacement and cleaning guidance and avoid blocking the air intake or outlet with furniture. Keep the unit accessible for inspection and filter changes. This is the standard Smart Air Purifier 4: filters, specifications and accessories for the 4 Lite, Compact or Pro should not be assumed to be interchangeable.

Key features

• Manufacturer-rated particle CADR up to 400 m³/h
• OLED display with air-quality information
• Control through the Xiaomi Home app
• Replaceable filter and night-time operating mode

Compatibility and installation

Choose the purifier around room size and layout, and leave the clearance required by the manual around the air intake and outlet. Actual cleaning performance depends on room conditions, airflow and filter condition. Filters are consumables and require replacement; check availability when planning ownership. This is the Smart Air Purifier 4, not the 4 Lite, Compact or Pro. It is an air-filtration appliance and does not replace fresh-air ventilation or air conditioning.

Frequently asked questions

Will one purifier cover my whole home?

Do not assume that a single room purifier will clean several separated rooms effectively. Share the room dimensions and layout, including open doorways, so suitability can be assessed around the space you actually want to treat.

Does it cool the room like an air conditioner?

No. It circulates air through a filter rather than providing air conditioning. It also does not replace a ventilation system. Choose cooling, fresh-air ventilation and filtration according to their different purposes.

Is the filter washable?

Do not wash the filter unless the manufacturer explicitly permits it for the exact filter component. Follow the product’s maintenance instructions and distinguish between cleaning accessible surfaces and replacing the filtration cartridge.

Does the historical price in the video apply here?

No. The linked independent video is an unboxing and product walkthrough. Prices and offers mentioned there are historical. Smartify will confirm any future selling price, regional package, filter availability and warranty separately.

Availability and enquiries

Out of stock at Smartify. Enquire to register your interest or discuss an available alternative. Availability, price, regional version and warranty will be confirmed before any order; no restock date is promised.

Tell Smartify your room dimensions and city when registering interest. The independent video below is for a product walkthrough, not a current price or availability promise.

Product video

Independent unboxing and first look by Digit; pricing in the video is historical

Manufacturer product information