Xiaomi Smart Air Purifier 4 vs. 4 Pro vs. 4 Lite – Which purifier filters the air better?

One of the lessons that the pandemic has taught us is how important it is to keep the environment clean and purified to prevent the rapid spread of viruses. To do this, resorting to a purifier is an effective alternative, and choosing one from Xiaomi is also cheaper. But would you know which one to choose? We help you with this comparison of the Xiaomi Smart Air Purifier 4 vs 4 Pro vs 4 Lite models .

The main characteristic of these purifiers is their high degree of intelligence and innovation, something easy to guess from the fact that the word “Smart” is in their name. It is in the second part of its denomination where we must stop to find out what their differences are. The three versions that are part of the range are, roughly , the standard, the small and the advanced. The Xiaomi Smart Air Purifier 4 Lite is ideal for smaller rooms, although that may not be the only reason to decide which purifier to buy.

In fact, the Xiaomi Smart Air Purifier 4 Pro has a great advantage over the other two, and it is the speed with which it purifies the entire environment. It also has an additional sensor that the other two purifiers lack, and that complements the filtration efficiency very well, because in addition to particles, it measures pollen. On the other hand, the standard model has a more balanced quality-price ratio, although its differences are greater with respect to the Pro than compared to the Lite.

However, the best way to check which of the three purifiers is most recommended for your home is by analyzing them thoroughly. And that is what we have done throughout this article. Read it in full!

Xiaomi Smart Air Purifier 4 vs 4 Pro vs 4 Lite – Comparison Table

Next, we break down the specifications of the three Xiaomi purifiers to help you see the differences more clearly:

(Slide the table to see all the content)

A very Xiaomi aesthetic

Some brands have managed to get users to establish quick associations of ideas just by seeing the products, either by their shape, color or design. One of them is Xiaomi, which maintains a very clear and identifying line of sight on its devices. For example, all of them are available in Xiaomi’s characteristic corporate white color, and curved and rounded shapes also predominate.

Thus, the design of these three Xiaomi smart purifiers is very similar, with the difference in size corresponding to each version. That is to say, the Xiaomi Smart Air Purifier 4 Lite is a reduced version of its two rivals, and for this reason it is the lightest. On the other hand, the Xiaomi Smart Air Purifier 4 Pro is the largest and heaviest of the three, although it should be noted that it is not difficult to move it from one place to another.

The design is, therefore, very similar in all three cases. The purifiers maintain a smooth upper part, in which a small round screen stands out, and below which we see the ventilation plate through which the air is emitted. The corners are rounded, giving it that Xiaomi touch we are talking about.

Filtration capacity is the big difference

Although aesthetically there are no great variations between the three Xiaomi smart purifiers, there are when it comes to the filtration capacity they have. The Xiaomi Smart Air Purifier 4 Pro is the model that covers the largest surface area, working in up to an area of ​​60 square meters. Below is the Xiaomi Smart Air 4, with 48 square meters, and the 4 Lite, with 43 square meters of maximum range.

At this point you have to touch on another important concept if you are going to buy a purifier, CADR particle filtering. This acronym refers to the rate of clean air particles that are emitted to the outside (Clean Air Delivery Rate). That is, it is the value that allows us to know how fast a purifier can clean the air in a certain room. The Xiaomi Air Smart Purifier 4 Pro has a CADR rate of 500 m³/h, above the 400 m³/h and 360 m³/h that the 4 and 4 Lite models have respectively.

What does this mean? It delivers 8,330 liters of clean air per minute, which is reduced to 6,660 in the case of the Xiaomi Smart Air Purifier 4 and 6,000 in the smallest model. Therefore, the Pro model is the fastest to renew and clean the air in a room, even if it is larger, since its extension area is wider.

Likewise, the maximum capacity of the activated carbon filter included in each purifier must be taken into account . In the case of the Xiaomi Smart Air Purifier 4, the active carbon layer is 500,000 mg, which rises to 650,000 mg in the Smart Air Purifier 4 Pro. Finally, in the case of the Xiaomi Smart Air Purifier 4 Lite, it is reduced to 450,000mg.

The sensor to measure air quality also improves

Regarding the ability of each purifier to measure air quality, it should be noted that the Xiaomi Smart Air Purifier 4 and 4 Lite have a PM 2.5 sensor, while the Pro model complements it with a PM 10 sensor. The first sensor is used to measure particles, while PM 10 also allows measuring the amount of pollen in the environment.

Different operating modes

As usual in home technology devices, Xiaomi air purifiers have several operating modes to choose from. This is, in fact, the main difference between the 4 and 4 Lite models, and you will see why. The Xiaomi Smart Air Purifier 4 and 4 Pro have 6 modes of operation, while the Smart Purifier 4 Lite has 3.

The three common modes on purifiers are auto mode, night mode, and favorite mode, which can be set through the app and customized to your preferences. The 4 and 4 Pro models also have low, medium and high speed modes, which allow you to adjust the speed of air emission in a more versatile way.

As for the night mode, it should be noted that the quietest purifier of all is the Xiaomi Smart Air 4 Purifier, with a noise level of 32 decibels, slightly lower than the 33 achieved by the Pro and Lite. Of course, in practice, all three are equally silent.

High level of intelligence and technology

As we anticipated in the introduction, the three Xiaomi purifiers are classified as “smart”. This is mainly due to the set of sensors that make it possible to optimize the operation of each one to the maximum. First of all, we can see the level of air quality on the round OLED screen, where it is graphically displayed in a range of colors that goes from green to red, and that allows us to see if we are in a more or less clean environment.

In addition, the three purifiers are synchronized with the Xiaomi Mi Home app, so you can configure them through your smartphone. In fact, this system is very useful for activating or deactivating less interesting features, turning the purifier on or off, or changing the mode of use. Also on the mobile it is possible to see the level of quality, temperature and humidity of the environment, and monitor the status of the filter. In fact, when it is necessary to change the filter, we will be able to see the notice on the phone.

On the other hand, the three models can also be connected with the Alexa and Google Home voice assistants, so that they are integrated into your home automation and it is even more convenient for you to activate them.

Xiaomi Smart Air Purifier 4 vs 4 Pro vs 4 Lite: Which smart purifier stands out the most?

From a functional point of view, the Xiaomi Smart Air Purifier 4 Pro has a clear advantage over its two range brothers. It is the one that can clean the air the fastest, and the one that guarantees a greater coverage area, enough reasons to justify its higher price. In addition, it has an additional sensor that measures the amount of pollen, in addition to particles, which increases the efficiency of the filtration and purification system. It is true that its size is larger, but, although it weighs more than the 4 and 4 Lite purifiers, it is not difficult to handle and transport. 

On the other hand, the reason why many people decide to buy a purifier is to ensure that the environment in their home or office is always kept as clean as possible. This leads us to intuit that, in many cases, the technical reasons will outweigh the economic ones. Above all, taking into account that the price difference, although there is one, is smaller than we thought when we saw the differences in clean air emission capacity.

In short, the most effective purifier of the three is the Xiaomi Smart Air Purifier 4 Pro. However, if you cannot afford such a high budget, you should know that the main difference between the Smart Air Purifier 4 and 4 Lite is basically reduced , to the modes of operation, in addition to a kilo of weight, approximately. Therefore, think about which aspects are most important to you, and decide based on your preferences.