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Home > New Gear > Xiaomi Mijia Air Purifier 3 Hands-on Review: The Most Affordable Air Purifier
Xiaomi Mijia Air Purifier 3 Hands-on Review: The Most Affordable Air Purifier

Xiaomi Mijia Air Purifier 3 Hands-on Review: The Most Affordable Air Purifier

By  Joe Horner 2019-09-19 16236 0

Xiaomi Mijia Air Purifier 3 is Xiaomi's latest air purifier, compared with the previous generation of Mijia Air Purifier 2 in terms of performance and design have been greatly improved. So is this purifier 3 worth buying? Is it convenient to operate, and what is the effect ? If you want to know this, please read this review post carefully.

Mijia air purifier 3 

Xiaomi Air Purifier 3 Unboxing

Xiaomi Mijia air purifier 3 is packed in environmentally friendly cardboard boxes with thick foam inside, which can effectively protect against collisions during transportation. The accessories section includes a power cord, a quick guide, and a manual for use, and it is necessary to mention that the power cord is placed in the filter cartridge of the purifier.

Mijia air purifier 3 

Xiaomi Air Purifier 3 Review: Appearance

In appearance, Xiaomi Mijia air purifier 3 maintains the white simple style of Xiaomi household appliances, the whole body of the machine uses white as the main tone, the appearance does not have too many decorative elements.

Mijia air purifier 3 

The edges and corners of the whole purifier have been done arc processing, there is a comfortable sense of roundness, can be integrated into a variety of styles of home decoration elements, compared with each other. Machine size 240x240x520mm, small volume covers an area of less than 0.1 square meters, very suitable for small households. The whole machine weighs 4.8 kg, but it is inconvenient to move because there is no wheel design at the bottom.

Xiaomi Air Purifier 3 Review: Performance

In terms of performance, the Xiaomi Mijia air purifier 3 has made a lot of improvements over the previous generation of air purifier 2S, for example, the CARD value of particulate matter has been increased from 310 cubic meters/h to 400 cubic meters/h, an increase of 29%.

At this point, many friends do not know the significance of this value of CARD. In fact, it is the concept of clean air output ratio. It is also an intuitive embodiment of measuring the performance of air purifier products. The greater the clean air output ratio, The higher the purification efficiency of the purifier. The hardware is also upgraded to a backward centrifugal fan, which can output more air volume; coupled with the upgrade of the touch screen and the control of Xiao Ai, the performance-to-price ratio of this Mijia air purifier 3 is still relatively high.

Xiaomi Air Purifier 3 Review: Structure

The upper part of the front panel of Xiaomi Mijia air purifier 3 has a circular OLED touch display screen that digitally displays the value of PM2.5 in the surrounding environment, air temperature, air humidity, and the working mode of the purifier. The lower touch keys in turn can achieve automatic shift, sleep mode, low speed, medium speed, high speed, favorite file switch, the peripheral light color will be red, orange and green with the size of the PM2.5 value.

Mijia air purifier 3 

Note: When the indoor PM2.5 value is greater than 150, it is displayed in red, indicating that the air quality is poor at this time; when the PM2.5 is 75-150, the indicator light is orange, indicating that the air quality is general; when less than 75, it is green, indicating that the air quality is excellent.

Both sides of the Xiaomi Mijia air purifier 3 fuselage and front of the fuselage are designed with dense small hole air inlets to ensure that the surrounding air enters the purifier interior with a large flow rate from three sides to filter.

Mijia air purifier 3 

The air outlet is designed as a large area of grid installation, which is conducive to the rapid and uniform transportation of air flow. Simply put, the purifier is the process of pumping air into the interior through the following three air ducts, filtering the filter element and then flowing out from above to form a 360-degree air eddy current to gradually purify the indoor air. Mijia air purifier 3 can transport up to 6660L of clean air per minute, the purification efficiency is still relatively fast.

The Xiaomi Mijia air purifier 3 fuselage is equipped with a high-precision laser sensor to monitor the tuyere, which can detect tiny particles and dust, and feed back the PM2.5 value in real time.

On the left is a temperature and humidity sensor that monitors temperature and humidity in the air. Unfortunately, the device does not have formaldehyde-related sensors, such as formaldehyde values, which are critical for newly decorated or baby families. In addition, there is a screen switch button at the top to adjust the display brightness of the screen.

Mijia air purifier 3 

The cover plate on the back of the Mijia air purifier 3 can be easily removed through the upper hand buckle, and a contact switch is designed at the connecting part of the cover plate, that is to say, even when the purifier is working, once you open the cover plate, it will immediately cut off the power supply to ensure safety.

After opening the cover plate, you can see the barrel-shaped filter element, under the filter element is a spring base, a little downward pressure can pull out the filter element.

Friends who have a little knowledge of the air purifier will know that its working principle is simply the process of sucking in the room air and then filtering it through the filter element and then releasing it. Then the quality of the filter element will directly affect the air purification effect, Mijia air purifier 3 is still an integrated design, the advantage is that the cost is relatively cheap, the disadvantage is that once the end of the service life must be replaced as a whole.

Mijia air purifier 3 

Through the decibel tester at a distance of about 50cm from the purifier, the working noise of the purifier in sleep, 1, 2 and 3 wind speed modes were measured, which were 38.2dB, 39.2dB, 53.5dB and 60.3dB, respectively. It is basically close to the official data, and the voice is so low in sleep mode that sleeping at home during the day or sleeping at night does not affect normal life.

Mijia air purifier 3 

Xiaomi Air Purifier 3 Review: Operation

As a Iot intelligent device of Xiaomi family, Mijia air purifier 3 supports Mijia APP networking and AI voice control, and can issue voice commands through Xiaomi intelligent speakers. For example, purifier switch, switch working mode, query filter life, indoor temperature and humidity, etc. Control purifier is a matter of one word, very convenient. In addition, it can also be linked with other intelligent products of Mijia.

Mijia air purifier 3​ 


In general, this Mijia air purifier 3 whether in appearance or purification performance are good, compared with the price is also very high cost-effective, ordinary people can also affordable. More suitable for small households in the use of families, such as the study, children's room, etc., purification capacity has been fully adequate.

 You may also want to read:
 Xiaomi Mijia Air Purifier Pro H Unboxing Review
 Xiaomi Mijia Air purifier 3 VS Xiaomi Mijia Air purifier 2: What's the improvement?
 Xiaomi Haylou GT1 TWS Earbuds User Instruction: How to touch the Haylou GT1?

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