In this Xiaomi Pro vs Pro H vs 4 Pro review, we will compare the two high-end devices of the third generation of Mi Air Purifiers with the recently released flagship model.
Is the Mi Air Purifier Pro, which is one of the most popular models out there, also the best choice for you? Should you rather invest in the upgraded Mi Air Purifier Pro H? Or does the new Mi Air Purifier 4 Pro steal the spotlight?
This side-by-side comparison will help you find out.
Xiaomi Pro
Xiaomi Pro H
Xiaomi 4 Pro
Coverage Area
35 – 60m²
42 – 72m²
35 – 60m²
Coverage Efficiency
166m²/h
200m²/h
166m²/h
CADR (Particles)
500 m³/h
600 m³/h
500 m³/h
CADR (Formaldehyde)
70 m³/h
220 m³/h
200 m³/h
Working Noise
34 – 69 dB
34 – 65 dB
34 – 65 dB
PM 2.5 Sensor
Yes
Yes
Yes
Comparison: Xiaomi Pro vs Pro H vs 4 Pro – What are the Differences?
Coverage Area & Efficiency
With a coverage efficiency of166m²/h, the Mi Air Purifier Pro and 4 Pro are suitable for rooms of up to 60m². The Pro H on the other hand is able to deal with areas of up to 72m² thanks to a higher coverage efficiency of200m²/h.
To ensure that fresh breathing air is available in every corner of the room, all three models come witha 360° three-dimensional circulation system that helps distribute the freshly purified air as equally as possible.
Winner: Pro H
35 – 60m²
42 – 72m²
35 – 60m²
Clean Air Delivery Rate
The Mi Air Purifier Pro and 4 Pro both come with a Clean Air Delivery Rate (CADR) of500 m³/h, resulting in 8,330 liters of purified air per minute. Three different layers of filters enable them and the Pro H to remove up to 99.97% of 0.3 μm particles.
With a 20 percent higher CADR of 600 m³/h, the Pro H purifies close to 10,000 liters of air per minute. It is also able to remove more formaldehyde than both of its competitors at a rate of220 m³/h compared to70m³/h and 200m³/h, respectively.
Winner: Pro H
500 m³/h (Particles),70 m³/h (Formaldehyde)
600 m³/h (Particles),220 m³/h (Formaldehyde)
500 m³/h (Particles),200 m³/h (Formaldehyde)
Working Noise
Despite being the most powerful model, the brushless motor inside the Mi Air Purifier Pro H has a maximum noise level of just 65 decibels (dB), equal to the 4 Pro and less than the Pro. But to be fair, you probably won’t notice the 4 dB difference without using technology.
Take advantage of the Auto Mode that the three devices are equipped with during the day so that the air purifier only runs at full speed when air pollution levels are high. Before you go to sleep, switch to Night Mode and enjoy a barely noticeable noise level of 34 dB.
Winner: Pro H, 4 Pro
34 – 69 dB
34 – 65 dB
34 – 65 dB
Sensors & Display
All three models are equipped with high-precision laser sensors that detect the concentration of particles, the temperature, and the humidity in real-time and present that information together with the Wi-Fi status and operating mode on an OLED display.
A three-color light ring around the display of the Mi Air Purifier Pro tells you the current air quality even when you are across the room. The Pro H and the 4 Pro achieve this goal using a three-color and four-color light strip respectively, which is displayed on the screen.
Winner: Pro H, 4 Pro
Laser /OLED Display
Laser / OLED Touch Screen
Laser / OLED Touch Screen
Connectivity & Compatibility
The Mi Air Purifier Pro, Pro H, and 4 Pro all come with Wi-Fi capabilities, which allow you to conveniently monitor and control your air purifier from the couch or another room using your smartphone and Xiaomi’s Mi Home app.
If you own the Pro H together with a Mi AI Speaker, you can also use voice control to make adjustments. To have your device interact with Google Assistant or Alexa however, you will have to invest in the 4 Pro.
Winner: 4 Pro
Yes / Mi Home
Yes / Mi AI Speaker
Yes / Google Assistant, Alexa
Weight & Dimensions
In the final round of this Xiaomi Pro vs Pro H vs 4 Pro comparison, we will have a quick look at the weight and dimensions of the three devices. The Mi Air Purifier Pro takes up a bit less space than its two competitors, while the 4 Pro is the most lightweight model.
Winner: Draw
260 x 260 x 735 mm, 8.0 kg
310 x 310 x 738 mm, 9.6 kg
275 x 275 x 680 mm, 6.8 kg
Conclusion: Xiaomi Pro vs Pro H vs 4 Pro – Which is the Best Air Purifier?
In the end, the buying decision mostly boils down to the size of the room you want to cover. If it is below60m², the Mi Air Purifier Pro is powerful enough to meet all your needs and also a bit easier to move from room to room than the Pro H thanks to its smaller size.
For bigger areas or those suffering from seriously bad air pollution levels, however, the even more powerfulMi Air Purifier Pro H is the better choice. It is capable of removing significantly more particles andformaldehyde, all the while somehow being less noisy than its competitor.
Finally, theMi Air Purifier 4 Pro feels like an improved version of the Pro model. While the coverage area of the two devices is the same, the 4 Pro is a lot more effective when it comes to handling formaldehyde and is now officially supported by Google Assistant and Alexa.
Xiaomi Pro
Xiaomi Pro H
Xiaomi 4 Pro
Find out how the fourth generation of Xiaomi air purifiers performs against each other in our comparison Mi Air Purifier 4 Lite vs 4 vs 4 Pro.