Xiaomi 3C vs 3H vs Pro

In this Xiaomi 3C vs 3H vs Pro review, we will compare three of the most popular Xiaomi air purifiers that can help you clean your indoor air from PM 2.5 and other types of air pollution.

What is the difference between the Mi Air Purifier 3C and the Mi Air Purifier 3H? And how do these two perform against the Mi Air Purifier Pro? This side-by-side comparison will help you find out.

Coverage Area

22 – 38

26 – 45

35 – 60

Coverage Efficiency




CADR (Particles)

320 m³/h

380 m³/h

500 m³/h

CADR (Formaldehyde)

60 m³/h

60 m³/h

70 m³/h

Working Noise

31 – 61 dB

32 – 64 dB

34 – 69 dB

PM 2.5 Sensor





Comparison: Xiaomi 3C vs 3H vs Pro – What are the Differences?

Coverage Area & Efficiency

With a coverage efficiency of106m²/h, the 3C is best for rooms around22 – 38m². The more powerful 3H is suitable for rooms of up to45m². Lastly, the Mi Air Purifier Pro covers an area of 60m². At166m²/h, the coverage efficiency of the Pro is also the highest among these devices.

In all of the three models, a 360° three-dimensional circulation system makes sure that fresh breathing air is distributed equally to every corner of your room.

Winner: Pro

22 – 38

26 – 45

35 – 60 m²

Clean Air Delivery Rate

Removing up to 99.97% of 0.3 μm particles and providing 5,330 liters of purified air per minute, the 3C has a Clean Air Delivery Rate (CADR) of320 m³/h. The 3H has an even higher CADR of380 m³/h, which results in 6,330 liters of purified air per minute.

However, neither of the two come close to the purification capacity of the Mi Air Purifier Pro with a CADR of 500 m³/h or 8,325 liters of purified air per minute. It also removes the most amount of formaldehyde at70 m³/h.

Winner: Pro

320 m³/h (Particles), 60 m³/h (Formaldehyde)

380 m³/h (Particles),60 m³/h (Formaldehyde)

500 m³/h (Particles),70 m³/h (Formaldehyde)

Introducing the Mi Air Purifier 3C

Working Noise

Running at full speed, the brushless motor inside the 3C generates up to 61 decibels (dB) of noise. Meanwhile, the 3H maxes out at around 64 dB. As the most powerful air purifier in this comparison, the Mi Air Purifier Pro reaches the highest noise level at up to 69 dB.

For all three devices, it makes sense to use Auto Mode and let the air purifier do its thing during the day. At night or whenever you need the room to be as silent as possible, simply switch to the ultra-quiet Sleep Mode which in no case is louder than 34 dB.

Winner: 3C

31 – 61 dB

32 – 64 dB

34 – 69 dB

Sensors & Display

High-precision laser sensors inside all three devices are able to adjust the purification speed automatically and continuously check for the presence of pollution. A tri-color light ring indicates the current air quality even when you are standing across the room.

A digital LED display (3C) / OLED touch screen display (3H) / OLED display (Pro) also makes it easy for you to get real-time updates such as the PM 2.5 value, Wi-Fi status, and operating mode. Finally, you can also get this information via your smartphone (see below).

Winner: 3H

Laser / LED

Laser / OLED Touch Screen

Laser /OLED Display

Mi Air Purifier 3H Video Review

Connectivity & Compatibility

The 3C and 3H work with Google Assistant, Alexa, and Xiaomi’s Mi Home app. This allows you to use your smartphone to get the latest indoor air quality updates, control your air purifier remotely, set turn-on and turn-off times, and link it with other Mi smart home products.

Surprisingly, the Mi Air Purifier Pro does not have the capability to interact with Google Assistant or Alexa. So while you can control the device via your smartphone and the Mi Home app, it is not ready for voice control.

Winner: 3C, 3H

Yes / Google Assistant, Alexa

Yes / Google Assistant, Alexa

Yes / Mi Home

Weight & Dimensions

In the last round of this Xiaomi 3C vs 3H vs Pro comparison, we will have a quick look at the size and weight of the three air purifiers. At240 x 240 x 520 mm, the 3C and the 3H barely take up any space and also weigh less than 5 kilos.

Designed for larger rooms and being significantly more powerful than the other two devices, the Mi Air Purifier Pro is both larger in size and a lot heavier than the 3C and the 3H.

Winner: 3C

240 x 240 x 520 mm, 4.6 kg

240 x 240 x 520 mm, 4.8 kg

260 x 260 x 735 mm, 8.0 kg

Mi Air Purifier Pro Video Review

Conclusion: Xiaomi 3C or 3H or Pro – Which is the Best Air Purifier?

From the outside, there is not much that separates the Mi Air Purifier 3C from its bigger brother. With a base area smaller than that of an A4 paper and the minimalist white design, both devices only take up little space and fit into every room.

In fact, the only significant difference between them is that the Mi Air Purifier 3H is a bit more powerful and comes with a HEPA Class 13 filter. The 3H is also equipped with an OLED touch screen instead of a LED display.

Finally, if you are looking for an air purifier with the highest purification capabilities for your big room and don’t mind the missing voice control, you should consider investing in the Mi Air Purifier Pro.

Frequently Asked Questions

Which is better, Xiaomi 3C or 3H?

The Xiaomi 3C and 3H are almost identical aside from the fact that the 3H is more powerful and therefore better suited for bigger rooms. It also features an OLED touch screen display compared to the LED display of the 3C.

How long does a Xiaomi filter last?

The Xiaomi air purifier will display a notification to let you know when it is time to change the filter, as will the Mi Home app. In general, it is recommended to replace the filter element at least every 6 to 12 months.

Is Xiaomi true HEPA?

The triple-layer filter inside the Xiaomi 3H air purifiers includes a HEPA Class 13 filter layer with a filtration efficiency of 99.97% for particle size up to 0.3 microns.

Looking for even more powerful air purifiers? See how the Pro performs against the Pro H and the new 4 Pro in our comparison Mi Air Purifier Pro vs Pro H vs 4 Pro.


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