In this Xiaomi 2H vs 3H review, we will compare two of the most popular Xiaomi air purifiers that will help you clean your indoor air from PM 2.5 and other pollution.
Xiaomi 2H
Xiaomi 3H
Coverage Area
18 – 31m²
26 – 45m²
Coverage Efficiency
86m²/h
126m²/h
CADR (Particles)
260 m³/h
380 m³/h
CADR (Formaldehyde)
60 m³/h
60 m³/h
Working Noise
33 – 66 dB
32 – 64 dB
PM 2.5 Sensor
Yes
Yes
Comparison: Xiaomi 2H vs 3H – What are the Differences?
Coverage Area & Efficiency
Created with small rooms in mind, the 2H covers an area of up to31m². If you have a middle-sized room, the more powerful 3H with a coverage area of up to45m² is the better choice.
As for the efficiency, the 2H goes through about86m² in one hour, meaning it takes about 10 minutes to replace the air within a 21m² room with a height of 2.4 m. The 3H circulates up to 126m² per hour.
Winner: 3H
18 – 31m²
26 – 45m²
Clean Air Delivery Rate
Both devices are able to remove Formaldehyde from up to60 m³ of air per hour. But when it comes to particles as small as0.3 μm (which includes PM 2.5), the Clean Air Delivery Rate (CADR) of the 3H is way higher at380 m³/h compared to260 m³/h for the 2H.
Winner: 3H
260 m³/h (Particles),60 m³/h (Formaldehyde)
380 m³/h (Particles),60 m³/h (Formaldehyde)
Working Noise
Even if you place your air purifier next to your bed, you shouldn’t have any problems sleeping. At just over 30 decibels (dB), both devices are extremely quiet in Night Mode. On the maximum speed level, the noise level can rise to around 65 dB.
Winner: 3H
33 – 66 dB
32 – 64 dB
Sensors & Display
The 2H and its successorare equipped with air quality, temperature, and humidity sensors. But while the sensors inside the older model rely on infrared, the 3H uses more advanced laser technology.
Unlike the 2H, it also features an OLED touch screen that displays relevant information right on the device and can be used to easily make adjustments to the current mode and other settings.
Winner: 3H
Infrared / None
Laser / OLED Touch Screen
Connectivity & Compatibility
If you want to control your air purifier from the couch or even away from home, you are in luck with devices. Using a Wi-Fi connection and the Mi Home app, you can turn the 2H and 3H on, off, switch modes, monitor your home air quality, and more.
Both devices are compatible with Google Assistant and Alexa. By linking the 3H to Google Home, you can even control it using your voice.
Winner: Draw
Yes / Google Assistant, Alexa
Yes / Google Assistant, Alexa
Weight & Dimensions
With dimensions of240 x 240 x 520 mm and a base area smaller than that of an A4 paper, both air purifiers take up little space. The 3H weighs a bit less at 4.8 kg compared to 5.2 kg.
Winner: 3H
240 x 240 x 520 mm, 5.2 kg
240 x 240 x 520 mm, 4.8 kg
Conclusion: Xiaomi 2H or 3H – Which is the Better Air Purifier?
If you have a rather small room, don’t mind the missing display, and would like to save some money, theMi Air Purifier 2H is definitely still a great option for you.
If you want the better of the two devices though, there is no question that your choice should be theMi Air Purifier 3H. It is suitable for larger rooms, is equipped with aHEPA Class 13 filter, and comes with interesting gimmicks such as voice control.
Xiaomi 2H
Xiaomi 3H
Frequently Asked Questions
What is the difference between Xiaomi Air Purifier 2H and 3H?
The 3H is suitable for rooms of up to45m², significantly more than the 2H with31m². It does also have a much higher CADR at380 m³/h compared to260 m³/h for the 2H.
See how the third generation of Mi Air Purifiers differs from each other in our comparison Xiaomi 3C vs 3H vs Pro.