What is the difference between air purifiers Xiaomi: a complete guide to models

The climate technology market is oversupplied, but Xiaomi has set new standards for accessibility and functionality. Users are often lost in the abundance of names, numbers and acronyms, not realizing the real difference between a budget cube and a top-end humidifier tower. The main difference lies not only in the design of the case, but also in the applied filtering technologies, noise level and integration into the ecosystem of the smart home.

In this article, we will take a closer look at the design features of the various product lines so that you can choose the device that is perfect for your needs. Cleaning efficiency depends on the right size of the model, and ignoring these parameters can lead to the device running in vain, consuming electricity, but not improving air quality.

Modern cleaners are complex gadgets that are controlled through a smartphone. It's important to understand that the Mi Home app offers different functionality for different versions of devices. Some models can automatically go to sleep when there are no people, others require manually configuring scenarios, let's figure out which features are really useful in everyday life and which are marketing ploy.

Key differences in filtration systems

The heart of any cleaner is its filter element. Xiaomi devices are most often found combined filters. 3-into-1, But their composition and efficiency vary dramatically across the price range, HEPA-The microparticle layer and the coal block, but the coal backfill density and the class HEPA may be different.

Top-end versions, such as the Pro H series, use filters with increased activated carbon content, which is critical for those living in the heart of a metropolis or near industrial zones. Coal adsorbs volatile organic compounds, formaldehydes and unpleasant odors, with which ordinary HEPA-The filter is not able to cope with the filter resource in these models is also much higher, which reduces the frequency of substitutions.

⚠️ Attention: The use of original filters is critical to the correct operation of sensors. Cheap analogues can have different aerodynamics, which will lead to engine overheating or incorrect readings of the air quality sensor.

The antibacterial coating is particularly noteworthy, and the new models use a special layer that inhibits the bacterial reproduction on the surface of the filter itself, which solves the problem of secondary contamination when accumulated microorganisms are released into the air again. For families with young children or allergies, the availability of this option is a decisive factor when choosing between two similar models.

Productivity and service area

The main technical parameter to look at when choosing is the CADR (Clean Air Delivery Rate), which indicates the amount of clean air delivered by the device per minute. Lite models usually have CADRs of about 300-330 m3 / h, which is enough for a room of up to 40 square meters. More powerful versions of the Pro deliver up to 500 m3 / h and above.

It is important to understand the difference between maximum and effective area. The manufacturer often specifies the maximum area, meaning a single run of air. To achieve the claimed cleaning effect in a room with people, it is recommended to take a model with a margin of power. The air circulation in the room should be complete so that the device can effectively remove contaminants.

• 🏠 Small rooms: For bedrooms up to 25 m2, compact models of the series are ideal 3H 4 Lite that is quieter.
• 🏢 Studio apartments: Open spaces require high-end devices CADR, The Xiaomi Air Purifier 4 Pro.
• 🏭 Contaminated areas: If you live by the road, take a model with a power reserve to cope with the constant influx of dust.

And the geometry of the room is also important, because high ceilings or partitions can reduce the efficiency of the cleaner, and in these cases, it makes sense to consider installing two less powerful devices at different ends of the apartment instead of one heavy-duty one, which will ensure a more even distribution of the cleaned air.

Smart Functions and Integration into the Ecosystem

All modern Xiaomi cleaners support Wi-Fi connectivity, but the level of this “smartness” varies. The basic models allow you to only turn the device on and off remotely. OLED-displays and an extended set of sensors, provide detailed statistics in real time right on the screen of the smartphone.

Special attention should be paid to voice assistants. Devices are great friends with Google Assistant, Amazon Alexa and Yandex Alice (through integration). You can ask the assistant to turn on the cleaning while you are not at home, or set up automatic on when air quality deteriorates. Automation of scripts allows you to create a truly comfortable environment without human intervention.

Example of the scenario in Mi Home:


IF (Air Quality < Good) AND (Time > 23:00)




TR (Enable Night Mode)




And (screen brightness -> 0%)

Air quality sensors are also different, with simple models using a laser particle sensor called PM2.5, which in the top-end versions adds temperature and humidity sensors, and in some cases, a formaldehyde sensor, which turns the purifier into a full-fledged atmospheric analyzer in the home, allowing you to control not only dust, but also the chemical composition of the air.

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Set up a filter change notification in the application in advance. Often the resource runs out at the most inopportune time, and having a spare filter or understanding the expiration of your life will save you from inhaling dirty air.

Noise level and night operation

For many users, especially studio or small bedroom owners, noise levels are a critical parameter. Xiaomi is paying great attention to this aspect by introducing aerodynamic improvements to the design of fan blades. Pro models often work quieter at medium revs due to increased body size and optimized flow.

Night mode is not just about reducing the brightness of the lights. In this mode, the engine algorithms are reconfigured to minimize noise, even at the expense of performance. But even in this mode, modern cleaners are able to maintain acceptable air quality in the bedroom. Acoustic comfort directly affects sleep quality, so you can't ignore this parameter.

It's worth noting that the decibels that the manufacturer claims are often measured at minimum speeds. At maximum speed, any air purifier will buzz quite perceptibly. So, when choosing, focus on the noise performance in Auto or Sleep mode, since this is the mode in which the device will work most of the time.

Design and design features

Xiaomi's cleaners have become a kind of minimalist look, but different engineering solutions are behind the same look. For example, the way you replace the filter may be different: some models need to unscrew the back cover, others need to remove the top grille, and maintenance ergonomics affect how often you actually change the filters, rather than delay this procedure.

The materials of the case also play a role. Plastic in different series can have different texture and resistance to yellowing. Snow-white glossy or matte plastic easily fits into any interior, but requires maintenance. Some models have removable rings-decorators, allowing you to personalize the device to the color of the walls or furniture.

• 🎨 Removable covers: In some series, the option of replacing the color of the upper part of the body is available.
• 🔌 Cable location: In new models, the cable is thinner and more flexible, and its connection is optimized for tight fit to the wall.
• 💡 Indication: Color ring or OLED-The screen is not only beautiful, but also informative, showing the level of color pollution.

⚠️ Warning: When installing a cleaner, leave at least 30 cm of free space on all sides. Closing the ducts with furniture or curtains dramatically reduces efficiency and can lead to engine failure.

Dimensions are also important. Compact models are easy to move from room to room with one hand; heavy Pro versions are best installed at once, as their weight along with the filter can be significant. Think about the logistics of placement before you buy, so that the device does not interfere with the passage and does not become an obstacle to the robot vacuum cleaner.

Comparison of popular models: 3H, 4, 4 Pro and Pro H

To make a final decision, let's compare the key characteristics of the most popular lines. 3H It became a classic of the middle segment, offering OLED-The 4 and 4 Lite series have replaced, offering a more modern design and improved aerodynamics, but the Lite version has removed the display, leaving only control from the smartphone.

The flagship 4 Pro features increased carbon content and increased performance, making it a leader for larger rooms. The Pro H version has gone even further, with improved filters with anti-bacterial and virus protection, and more accurate sensors, and the price difference between these models is often justified by the durability of the filters and the accuracy of the sensors.

When you choose between them, ask yourself: do you need a display on the case? If you plan to control everything from your phone, the Lite version will save you money. If visual information about the air condition without getting a gadget is important, take models with a screen. For allergic people, the priority should be the Pro H model with its enhanced protection.

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The best choice for most 40-50 m2 apartments is the Xiaomi Air Purifier 4 Pro, which combines high performance and reasonable noise levels.

Remember, technology is evolving rapidly, and new models may emerge with better AI algorithms that better predict air pollution, but the basic principles are good quality. HEPA-filter and sufficient performance – have remained unchanged for several years.

Frequently Asked Questions (FAQ)