icon 2019

Xiaomi Mi Intelligent Air Purifier 2 Review

XiaoMi is a global brand that makes everything from smartphones, televisions, headphones, smart devices, and many more.

One smart device that they make is the Mi Intelligent Air Purifier and XiaoMi just made the new and improved version of it.

So, how good is this air purifier?

In this review, we’re going to discuss the design, build quality, performance, and price/value of this home air purifier. At the end, we’ll tell you our verdict whether or not this thing worth your hard-earned bucks.


xiaomi air purifier

Compared to the first generation, the second gen is more lightweight and 40% smaller. It now measures 11.4 x 22.8 x 11.4 inches and weighs 11.02 pounds.

The Mi 2 air purifier has a minimalistic boxy design. It looks sleek and some people even call it sexy. It’s a design that will fit nicely to any room in your home.

On the front, there are three small lights showing which Mode is active while the back portion of the unit features a huge and easy access door to the filter.

You won’t find many buttons on the unit. There’s one on top to switch between modes plus another button on the back to dim the lights.

xiaomi air purifier review

The Mi 2 air purifier uses a 360-degree triple-layer filter, which consists of a primary filter, ultra-dense EPA filter, and an activated carbon filter. The 360-degree design allows it to draw and purify air from all direction.

The dirty-air inlets located at the lower half of the unit on all four sides. The top part features a fan to blow clean and fresh air.


The Mi Intelligent Air Purifier 2 is a fine piece when it comes to build quality. You won’t find expensive brushed aluminum anywhere, though. To ensure the device remains affordable, the machine has all-plastic exterior.

XiaoMi brags about how the parts for this air cleaner are sourced from world-class suppliers. For instance, the brushless motor for the fan is supplied by Nidec, the market leader in brushless DC motor.

It’s the same story for the plastics, switches, terminals, temperature and humidity sensors, screws, and filters. All of them are sourced from leading companies.


The CADR (Clean Air Delivery Rate) rating for the Xiaomi Smart Air Purifier 2 is 310 M3/hour ( nearly 11,000 cubic feet/hour or 177 cubic feet/minute).

It’s slightly a lower number than its predecessor but still a pretty good one from something of this size. Whether its allergens, pollutants, or bad odor, this unit can clear them up in minutes.

mi air purifier 2

Now, let’s have a better look at the three-layered filter.

PET primary filter: Made with PET (polyethylene terephthalate), this filter traps larger particles such as hair and dust.

Ultra-dense EPA filter: This filter won’t let PM10 and PM2.5 particles go through. PM stands for Particulate Matter.  PM2.5 means particulate matter with diameter of 2.5 micrometer or less. This particulate matter is especially dangerous since it can invade the alveoli in your lungs and cause severe damage.

Activated carbon filter: VOCs (volatile organic compounds) and bad odor from cooking, cigarette, mold, new paint, or pets are no match for this filter. Activated carbon has a large surface area that adsorbs VOCs effectively.

Now, the ability to adsorb VOCs is a big deal because not every air purifier on the market does this. You may have to rely on planting indoor plants to adsorb harmful VOCs.

To understand more about VOCs and its adverse effects on your health, watch this video below.

There are three modes you can choose: Auto, Sleep, and Favorites.

The auto mode changes the fans speed according to how polluted the air in the room is. Obviously, you’d want to run it on Sleep mode during nighttime. With the fan turns down, even the light sleeper won’t have a problem having it running all night in the bedroom.

Xiaomi claims that the noise level is only 30 dB on Sleep mode. As a reference, 30 dB is like a faint conversation or a murmur.

If you wish to adjust the fan speed as you please, go ahead and pick the Favorite mode. Xiaomi says this air cleaner can thoroughly circulate the air in a 226 square feet (21 square meters) room in just 10 minutes.

“But my bedroom is larger than 226 square feet”

No problem. Xiaomi designs this unit for rooms in the 292 – 501 square feet (27.2 -46.6 square meters) range. A research by the National Association of Home Builders (NAHB) revealed that the average master bedroom is 309 square feet in size while the average living room is 330 square feet.

Even if you have a larger-than-average living room or bedroom, this air purifier will fit just right.

Oh, and let’s not forget about the Mi Home App.

xiaomi air purifier 2 review

XiaoMi doesn’t call this device an intelligent air purifier for nothing. The app is both informative and functional. It runs through Wi-Fi and works with your iPhones or Android devices.

The Mi Home App tells you the PM2.5 concentration in the air, humidity, temperature, running, time, the amount of clean air delivered, and also the filter condition. The App also allows you to start/stop the purifier and change between modes.

Pairing the device with your smartphone is a painless process and you’ll be thankful for it because the manual just glosses over this.

After you download and install the app, just press the button on the back on the air purifier for a couple of seconds until the light blinks, open the app, pair over Wi-Fi, and you’re done.

One thing to note is that if you want to bring it to its fullest potential, don’t tuck it in a corner. You’ll be wasting the 360-degree filter’s advantage that way. Put it at least three feet from the walls or just place it on an elevated surface like a coffee table, for example.


This unit eats 31 Watts of electricity when you run it on full blast. It consumes much less than that when you use the Sleep mode, of course. You won’t notice any significant increase on your monthly electricity bill, that’s for sure.

And like other air purifiers with removable filters, you will need to change the filter on this unit too. The filter is good for 4 to 6 months depending on how bad the air in your home is. It’s easy to change the filter, though.

xiaomi mi air purifier 2

The replacement filter is about 30 USD a pop as of this writing. If you think the price for the replacement filters is too expensive, you can try vacuuming the filter regularly to extend its lifetime. The outer filter is very durable. It won’t warp when you vacuum it.

While you’re at it, filter the vents, interior walls, and fan blades too. It will keep the unit running at its finest throughout the year.


You’ve got to admit XiaoMi is not the brand that pops to mind when you’re in the market for an air purifier.

Nevertheless, the new and improved Mi Intelligent Air Purifier 2 armed with a number of improvements over its predecessor does look appealing when you’re in the market for a smart air purifier.

The new Mi Intelligent Air Purifier 2 looks better, works quieter, and gives you the clean and fresh air that your family so very deserves without a fuss.

If you put your family’s well-being on top of your priority list, then having an air purifier that can cut PM2.5, PM10, and VOC level significantly like this one is a must.

Looking a different air purifier? Here are some of our other reviews!

  • Design - 9/10
  • Perfomance - 8/10
  • Price/Value - 7/10
  • Features - 7/10