Filters for Xiaomi Mi Air Purifier: which to choose so as not to harm health and technology

Xiaomi Mi Air Purifier air purifiers have long been the standard of quality in the smart home gadget segment. But even the most advanced model turns into a useless box with a fan if it has a worn or inappropriate filter. Choosing the right filter is not only a matter of cleaning efficiency, but also a guarantee of safety: cheap fakes can emit formaldehyde, and inappropriate ones can reduce performance by 40%. In this article, we will analyze what filters are, how to distinguish them from fakes and what to look for when buying a particular model of a cleaner.

The original Xiaomi filter is not always better than its counterparts, for example, Mann Filter filters or other products. 3M often exceed the Chinese originals in terms of service life and degree of cleaning, but stand on the 20-30% And here's AliExpress's nonaime filters. 500 The swelling can be a threat to the lungs: 2023 In the year Rospotrebnadzor found in such products excess of MPC of harmful substances in 3 So we're going to build our guide on three pillars: compatibility, efficiency and safety.

Filters for Xiaomi Air Purifier: how they differ

Xiaomi filters are divided into three categories by design and purpose, and a type error can cause the device to either not clean the air of specific contaminants (such as viruses) or to start working for wear and tear.

Main types:

• 🔹 HEPA-High Efficiency Particulate Air (HEP) – captures up to 99.97% of particles up to 0.3 microns (dust, pollen, bacteria) in size. H11-H13. Pro and 4 Series models are equipped with True HEPA supplemented with antibacterial coating.
• 🔹 Coal filters adsorb gases, odors and volatile organic compounds (VOCs). In Xiaomi cleaners, the coal layer is integrated into the system. HEPA-filter (except for Mi Air Purifier models) 2S, where he goes separately).
• 🔹 Combined filters – combine HEPA + coal-fire + Sometimes additional layers (such as formaldehyde catalyst in models for China) are the filters that come with most Xiaomi cleaners.

Important: in Mi Air Purifier models 3H And now we're using a laser sensor. PM2.5, Installing an uncertified filter can cause an error. E1 (sensor).

Compatibility of filters with Xiaomi models: table of correspondence

One of the most common mistakes is to buy a filter that is "similar in size," and even if it fits your model physically, the electronics of the cleaner may not recognize it, and the performance will fall on your model. 30-50%. The following is the compatibility table for the original filters (articles begin with the following: BHR- or AC-M):

⚠️ Note: Filters for Mi Air Purifier 2 and 2S visually identical, but have different densities HEPA-Installation of the filter from 2S c the base model 2 will lead to increased load on the engine and reduce its service life.

If you don't find your model in the table, check the filter article on the cleaner body (usually the sticker on the back).An alternative way is to look at the Mi Home app: the device section shows the recommended article.

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The average price of the original filter for Xiaomi Mi Air Purifier is 2500-4000 rubles. Analogues are 2-3 times cheaper, but do not always justify the savings.

The original Xiaomi filters:

• ✅ Guaranteed compatibility with device sensors (no errors) E1/E2).
• ✅ Certified cleaning efficiency (conformity to the standard) GB/T 18801-2015).
• ✅ Optimal air resistance – do not overload the engine.
• ❌ High price (especially for Pro and 4 Series models).
• ❌ They are quickly clogged in conditions of high pollution (service life is reduced to 3 months).

Analogues (Mann Filter, 3M, Filtrete, local brands):

• ✅ Price is 40-60% lower than the original.
• ✅ Some brands (e.g. Mann Filter) CUK 29004) exceeds the original in density HEPA.
• ❌ Risk of getting a fake (especially when buying on marketplaces).
• ❌ It may not work correctly with Xiaomi sensors (indications) PM2.5 15 to 20 overpriced%).

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Before buying a similar, check if it has a Eurovent certificate or AHAM. Without these documents, the filter can release harmful substances when heated.

When you can take analogues:

1. If you live in a low-pollution area (such as a city) and are not allergic.
2. If you have a Mi Air Purifier model 2/2S — It is easier to find a quality analogue.
3. If you are willing to put up with a small error of sensors (up to 10%).

When the original is required:

1. For models with laser sensor (3H, 4 Pro).
2. If you have allergies, asthmatics or small children in the house.
3. With high air pollution (megapolis, near the construction site, industrial zone).

How often to change the filter: signs of wear and life hacks

Xiaomi’s official recommendation is to change the filter every 6-12 months, but in practice, this can be reduced to 3 months or increased to 18.

• 📍 Air pollution level (in Moscow, the filter wears out 2 times faster than in Sochi).
• 🕒 Intensity of use (round-the-clock work vs 2 hours per day).
• 🌿 Type of pollution (dust wears out filters more slowly than tobacco smoke or construction dust).

Signs that the filter should be changed:

• 🔴 A red indicator is on the purifier panel (or a notification appears in the Mi Home app).
• 💨 Airflow decreases at maximum speed.
• 🤧 Households have worsened allergies or asthma.
• 🌫️ The smell of burning or dust in the room even after a long cleaning.
• 📉 Sensor. PM2.5 High values that do not decrease over time.

Life hacks to extend the life of the filter:

1. Use the cleaner in automatic mode (manually exposed maximum speed wears the filter 3 times faster).
2. Vacuum the pre-filter (the mesh that goes in front of you) regularly HEPA). This will increase the life of the main filter by 20%.
3. If there are no smokers or animals in the house, you can wash the coal layer (only for filters with a separate coal block!).

1. Remove the carbon filter from the case.


2. wash under running water (without detergents!).




3.Dry in the sun for 12 hours.




4. Put it back.

⚠️ Attention: HEPA-You can't wash the filter, it destroys its structure and causes the release of microparticles into the air, and don't dry the carbon filter with a hairdryer or in a microwave, which violates its adsorption properties.

Where to buy filters: official and alternative sources

The place of purchase depends not only on the price, but also the risk of running into a fake.

Official channels (100% original, but expensive):

• 🛒 Xiaomi official website - prices as in retail, but there are often discounts up to 30%.
• 🏬 Mi Store brand stores – you can check the filter on the spot (pay attention to the hologram and barcode).
• 📦 AliExpress (only official sellers: Mi Global Store, Xiaomi Official).

Alternative sources (risk of forgery 10–50%):

• 🛒 Marketplaces (Ozon, Wildberries, Beru) – look for sellers with a rating above 4.8 and reviews with photos.
• 🏪 Local appliance stores – ask for certificates of conformity.
• 🌍 Overseas sites (Amazon, eBay) – cheaper, but long-term shipping and duty risk.

How to distinguish the original from the fake:

1. The package must be sealed with a factory hologram (in the original it changes color when tilted).
2. The filter has a barcode and an article, which can be checked on the Xiaomi website.
3. The original filter has a uniform color and dense structure (fakes often have gaps).
4. The package includes instructions in Chinese and English (fakes are often only Russian translation).

Average prices for filters (June 2026):

Top.-5 Xiaomi Mi Air Purifier filters: rating 2026

Based on the tests of Roskoshestvo, user feedback and laboratory tests, we ranked the best filters for Xiaomi cleaners, taking into account cleaning efficiency, service life and compatibility with sensors.

1. The original filter Xiaomi AC-M10-SC (for 4/4 Pro)

• ✅ Better compatibility with Xiaomi sensors.
• ✅ True HEPA H13 + silver-coated coal layer (antibacterial effect).
• ❌ High price (from 3,500) ₽).

2. Mann Filter CUK 29004 (universal 3/3H/4)

• ✅ German quality, density HEPA higher than the original.
• ✅ Service life up to 12 months.
• ❌ It may not work properly with the formaldehyde sensor in 3H.

3. 3M Filtrete 1500 (for 2/2S)

• ✅ Cleaning efficiency 99.9% (according to tests) AHAM).
• ✅ Low air resistance – does not load the engine.
• ❌ Requires rework (trimming at the edges) for the perfect fit.

4. Bork A801 (pro-h)

• ✅ Built-in UV-sterilizer.
• ✅ Suitable for models with sensors TVOC.
• ❌ Price is comparable to the original (3800) ₽).

5. Timberk TFH S100 (budgetary option 3H)

• ✅ It is 2 times cheaper than the original (1500) ₽).
• ✅ It copes well with dust and wool of animals.
• ❌ Poorly picks up gases and smells.

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For models Mi Air Purifier 4 Pro and Pro H better not to save on filters – cheap analogues may not cope with viruses and bacteria, to fight against which these devices and designed.

Frequent errors in filter selection and installation

Even experienced users sometimes make mistakes that lead to a purifier breakdown or a deterioration in air quality.

1. Purchase of a filter by external similarity

For example, filters for Mi Air Purifier 3H Smartmi Air Purifier P1 visually identical, but have different densities HEPA. Installing an inappropriate filter will cause an error. E3 (sensor incompatibility).

Ignoring the prefilter

Many people forget to clean or replace the mesh prefilter that comes with the cleaner, and clogging it up by 30 percent reduces efficiency. HEPA-filter and increase the load on the engine.

Installation of the filter without sealing rubber

In the 4 Pro and Pro H, there's a rubber gasket around the filter perimeter, and if you don't install it, the untreated air will pass by the filter, negating all the cleaning.

4.Use of the filter after the expiration of the term

Even if the filter is visually clean, its adsorption properties are lost, for example, the carbon layer becomes a secondary pollutant after 6 months, starting to release the accumulated gases back into the air.

5. Storage of the filter in open packaging

HEPA-The filter absorbs moisture and dust even in the package, and if you leave it open for a week, it loses up to 20 percent of its efficiency before you even put it in.

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After changing the filter, reset the counter in the Mi Home app: Device settings → Reset the life of the filter. This is necessary for the pollution indicator to work properly.

FAQ: Answers to Frequent Questions