Xiaomi Air Purifier 2S: A Good Entry-Level Option?


According to the World Health Organisation, the air you’re breathing is killing you. Household air pollution is in fact, responsible for a slew of noncommunicable diseases like stroke, heart disease, and lung cancer.

It’s possible to guard against airborne contaminants, which is why we decided to test out the Xiaomi Air Purifier 2S as our first line of defence.

Aside from being 40% smaller than the original, this successor to the Mi Air Purifier 2 has been touted to have a high air intake rate, which lets it ‘clean air in a space of up to 21 sqm’ in a matter of 10 minutes.

But is that enough to make the 2S a worthwhile purchase?

Xiaomi Air Purifier 2S, $219 (RRP $299) on Qoo10

Built-In Features and Operation:

a. Dimensions

The Xiaomi Air Purifier 2S comes in a white tower casing that measures 24 x 52 cm (width x height), making it comparable in size to a regular stool. There is also a push-down panel on the back that makes it easy to access the 2S’s replaceable filter.

The device is light, at a manageable weight of 4.8kg even with the replaceable filter installed, allowing us to move the 2S around the office easily.

b. OLED Display

The 2S has a circular OLED screen built into the front, which lets users know what the surrounding air quality is like by displaying a PM2.5 reading (i.e. The concentration of fine particulate matter smaller than 2.5 micrometres in the surroundings).

The information displayed on the OLED screen also includes room temperature, humidity, Wi-Fi connection as well as the current operation mode (more on that below).

In fact, other purifier displays only show a PM2.5 estimate, hence making them less informative than the 2S’s.

c. Replaceable Air Filter

The Xiaomi 2S comes packaged with a default blue triple-layer filter. There  are also other options, such as a green filter which gets rid of formaldehyde, a common indoor air pollutant that triggers allergies and asthma in children, as well as a purple (anti-bacterial) version that are sold separately.

That said, the default blue version works just fine for day-to-day use. Designed for maximum intake of airborne pollutants in mind, the default filter has a  primary layer, an EPA filter layer and an activated carbon layer, which allow it to trap dust, plant fibres, hairs, and more.

Do also note that this internal filter has to be replaced from time to time. The Xiaomi app has you covered with automatic alerts in addition to providing a helpful estimate of how long your current filter will last.

d. Operation Modes

Like its predecessor, the 2S works by sucking dirty air through  943 intake holes that line its casing, before releasing purified air to the surroundings with the help of its internal fans.

The 2S’s three modes of operation come into play: Automatic mode, which adjusts the fan speed according to air quality; Manual mode, in which users have full control over fan speed; and finally, night mode that keeps fan noise to a minimum when it is time for bed.

Users can also toggle between these modes by either cycling through them by pressing the power button at the top or via the Xiaomi app.

Testing the Xiaomi 2S:

a. Set-up

Setting up the 2S was a straightforward process. Simply download the Xiaomi app, sign up for a Xiaomi account, select the Mi Air Purifier 2S from the menu, and then connect it to our Wi-Fi network.

While the 2S is perfectly capable of operating without the help of the Xiaomi app, the latter introduces several convenient features such as real-time monitoring as well as the ability to turn on/off the purifier without stepping away from your seat.

b. Using the purifier

We started off our test of the 2S by taking a look at the PM2.5 reading of our office storeroom, and that was when we got a surprise…

Turns out, the air in our storeroom was much cleaner than we thought.

At a PM2.5 estimate of 2, this meant that there were little to no airborne microparticles present in our storeroom. A reading of at least 12.1 and above would be required for the air to be even considered moderately unhealthy.

Nonetheless, we decided to let the 2S do its job by leaving it running for 4 hours in the storeroom, which led to the PM2.5 level dropping to 1.

On the other hand, one noticeable change that was not registered on the Xiaomi app/OLED display was a change in smell. One of our colleagues made a passing comment, saying that the mouldy odour that our storeroom had was mostly gone.

So, is it worth buying?

While we weren’t able to draw any solid conclusions about the 2S’s air purification capabilities (perhaps we could have tested it better by dirtying up the storeroom beforehand), it is a thoughtfully-designed appliance that is easy to set up, maintain and operate.

For its price and convenient features (particularly the OLED screen and app connectivity), the 2S is definitely a suitable model for homeowners who are on the lookout for an entry-level air purifier.

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