Why do we like to walk in the woods or walk in the hills? The view is of course great, but we are venturing into nature because of the feeling of freshness and purity that we miss in our homes.
The feeling when we open the window in the morning and catch the first rays of the sun is priceless. If we close our eyes and take a deep breath, we feel ready for whatever awaits us that day. When we close the window we lose feeling. Coming back to reality, to places where air quality is, in most cases, in doubt. Even if we think we have good, clean air in the house, fine particles will disagree with us. What can we do?
Ventilation systems are one option, but they are among the most expensive and therefore not suitable for every user. Opening windows is a free but short term solution. What did we leave? The solution, as always, is technical. Air purifiers are growing in popularity as awareness of the importance of indoor air quality increases. With the popularity, the demand increases and thus the development of technology. Perhaps somewhat surprisingly, we also find Xiaomi in the field of air purifiers. Yes, you heard right. Xiaomi has been preparing solutions for home use for a long time, from surveillance cameras and smart switches to routers, robotic vacuum cleaners and even air purifiers.
In the editorial office, we took a closer look at the new generation of Xiaomi Smart Purifier 4 air purifiers, robotic vacuum cleaners and Xiaomi Mi Robot Vacuum-Mop 2 Pro floor washing machines. Below you will find out how the air purifier works, what makes it special, and what the air quality was like after completing the job.
Xiaomi Smart Air Purifier 4 Lite (25-40m2): 159€
Xiaomi Smart Air Purifier 4 (30-50m2): 224 euros
Xiaomi Smart Air Purifier4 Pro (35-60m2): 264 euros
We tested the Xiaomi Smart Air Purifier 4 at the Computer News editorial desk.
Available at authorized Xiaomi partners, in Xiaomi Slovenia stores and online:
- Dimensions: 250 x 250 x 555 mm
- Product weight: 5.6 kg
- Coverage: 28-48 m2
- Clean Air Supply Rate (CADR): 400m3/ hour, 6600 l / m
- Noise: ≤64dB (A)
Xiaomi Smart Air Purifier 4: Design and Key Features
If you are familiar with the design of previous Xiaomi air purifiers, the new design will not surprise you. Xiaomi has remained faithful to the lines of simplicity and elegance with which to recognize previous generations of cleaners. The dimensions of the air purifier are 250 x 250 x 558 mm. It is a very compact device, which means that you can place it practically anywhere in the house or apartment, whether it is next to the TV, sofa or armchair, and due to the simple design it will not attract attention.
Once you have it set up and running, you will forget about it very quickly. why? Due to its elegant design, it blends in with most modern homes. In standard mode, you will not hear the sound of the fan, and at higher speeds the noise increases slightly, but the operation is still smooth. Even with the weight of the air purifier itself, you won’t have a problem. It weighs about 5 kilograms, and the HEPA filter is responsible for most of this weight. We tested the air purifier in different rooms and the movement itself isn’t arduous, although we wouldn’t defend ourselves if the air purifier sat on wheels.
In the middle of the Smart Purifier 4 you will immediately notice a small OLED screen that displays all the main information about the air quality in the room: the real-time value of PM2.5 particles, temperature, humidity, Wi-Fi connection status and operating speed. At the bottom of the screen are the main buttons, one for on / off, the other for adjusting the air cleaning speed. At the top there is a removable safety grille that protects the main fan from damage. The latter is able to provide 400 cubic meters of clean air per hour or 6,600 liters of fresh air per minute. This means that the air can be within 20 meters2 Clean the room in 10 minutes.
On the back of the air purifier we find the main particle sensor, the humidity and temperature sensor and, a little strangely, the backlight button for the OLED display. We did not need it during the test, because the initial exposure setting is not annoying, but Xiaomi can still integrate the functionality into the front screen. You’ll also use the button to learn about the cleaner through the app on your phone for the first time.
Even lower, there is a magnetic pin that hides the HEPA filter and two filter technologies: electrostatic charging and mechanical filtration. According to Xiaomi, this is intended to provide a highly efficient medium that removes 99.97% of airborne particles as small as 0.3 micrometers and captures dust, PM2.5 particles, pollen, pet dander, smoke and other fine particles. Compared to a conventional HEPA filter, the Xiaomi filter allows the air purifier to generate less noise and consume less energy, as it allows more air to flow through the filter while maintaining the same cleaning efficiency.
The three-in-one filtration system also contains activated carbon, which has a high degree of adsorption. Its functions are to remove harmful gases such as volatile organic compounds (VOCs) and formaldehyde, and take care of the freshness of your home. The Smart Purifier 4 also releases so-called negative ions into the air, which have been shown to strengthen the immune system, prevent fatigue, regulate blood pressure and more.
What is the air quality after use?
Some time ago, we were interested in the actual state of the air in our facilities. On the first run, we were pleasantly surprised, as the OLED screen in every room turned green. Good news for us, but it did not help us with the test. Therefore, we turned off the recovery device, opened the windows to a minimum during testing and always kept some rooms closed.
The value of harmful particles went up as expected, especially when we started cooking. The PM2.5 value went above 100 and in some cases got close to 200. We had the cleaning method set to automatic. Immediately after the particulate value rose, the Xiaomi Smart Purifier 4 responded quickly and began to clean the air. It took less than 30 minutes to return the PM2.5 value to optimal levels.
How did you feel in space? We noticed lower smoke intensity and cleaner air during cooking. The smell of the food was not very sharp, even when peeling the onions we had the feeling that we were shedding less tears than usual. Indoors for a long time, the smell and feeling of suffocation completely disappeared. During testing, after a two-day flight, we came home to rooms much newer than we were used to.
The OLED display is very responsive, even a light touch is enough to change the setting. This was also noticed by the pet, who played with the settings several times at night. Fortunately, you can lock the screen in the application, which stops the exploits of an “unauthorized” person.
The use itself is very easy. On the OLED screen, you can monitor the current air condition, temperature and humidity, adjust the cleaning speed, or activate the night mode. More features are available in the Xiaomi Home app, where you can turn negative ions on/off, set timers and screen brightness levels, and lock the screen of the air purifier. In the app, you can also monitor the health of the HEPA filter, which should last from six months to one year with average use. After 14 days of use, our filter had an additional 282 days of life, which is in line with Xiaomi’s timeframe.
The Xiaomi Smart Air Purifier 4 hides quite a few advanced technologies under the simple exterior design: a three-in-one filtration system, a HEPA filter, negative ion cleaning and activated carbon. Cleaning is very quick, inaudible, and self-sufficient, if you will.
Its presence would be more desirable in urban centers, where the quality of the outside air is significantly lower. Most users do not use ventilation systems that take care of active air circulation in the room, in urban centers, ventilation with open windows is very ineffective or in some cases can only deteriorate indoor air quality. The Xiaomi Smart Air Purifier 4 can be a simple and above all affordable solution to remove harmful particles in your home and ensure long-lasting freshness.