In unprecedented times, unprecedented test: what is the Dyson air purifier worth, one of the most successful and expensive on the private market? And above all, a question that some are asking: can such a device play a role in the fight against the coronavirus? To answer it, I turned to Sciensano, our public health institute, and to several international scientific articles. But above all, presentation of an extraordinary device …
Dyson Pure Hot+Cool Cryptomic, 699€
The English company Dyson is one of those interesting brands, created by engineers and not by young start-upers who have left their management studies. When certain companies analyze the economic forecasts of sales of a category of apparatuses to decide to manufacture them, Dyson does not bother and makes, when it has the idea, a innovative device which is shaking up the market. The proof of this is the invention of the bagless vacuum cleaner with cyclonic separation in 1983, and the ‘stick’ vacuum cleaner using the same technology in 2015. Not to mention its famous noisy but finally effective hand dryer (2006 ) found in restaurant toilets, in particular.
In recent years, several generations of Dyson air purifiers and fans have emerged. The latest is the Dyson Pure Hot + Cool Cryptomic. It’s about a rather imposing machine: about 1 meter high and about ten kg. Like any real purifier, its basic principle is to suck the ambient air, to pass it through its filters (including a HEPA), in order to blow sanitized air into the room.
Of course, Dyson does things right, which partly justifies the very high price (€ 699). The filters are cylindrical in shape, which allows the purifier to draw in air 360 °. And above, the system of blower, orientable and precisely motorized, allows the air to be sent in all directions. The goal is, of course, to move more air in the room, in order to filter every nook and cranny in a few hours. All of this is customizable: you can even ask it to blow the air backwards, so you don’t feel a draft pointing at you.
Where it gets very interesting for technology enthusiasts is that Dyson wanted to make its purifier more intelligent. He decked it out with sensors, electronic circuits and a screen in order to detect the quality of the air (in relation to the number of fine particles sucked in), to display it in real time and to develop a mode. automatic which adjusts the duration and the suction power to obtain the desired air quality.
The concept Cryptomic announced by Dyson is linked to the additional filter (there are therefore two categories in this purifier: HEPA + Cryptomic, see photos below) that is inserted during installation. It looks like a fine metal grid, but its purpose is to attack the molecular structure of formaldehyde, a harmful gas made up of very fine particles, particularly emitted by household cleaning products.
This Dyson is controlled with the remote control magnet or with an application that will provide you with more information on indoor and outdoor air quality (thanks to a third-party database).
What impact on the coronavirus?
It is worth taking a grain of salt, because while there are studies and scientific opinions on the benefits of air ventilation in times of coronavirus epidemics, this is not the case for purifiers. The reason, I imagine, is that there are inexpensive models that circulate significantly less air, or which are not equipped with the same quality of filter.
However, three points must be addressed in detail to enlighten you as best as possible.
First: yes, an air purifier can theoretically capture a coronavirus in its filter. Logic: a certified HEPA filter retains at least 99.97% of particles with a diameter greater than or equal to 0.3 µm (Dyson suggests 0.1 µm), but the coronavirus measures at least 60 µm. MORE it doesn’t mean much if someone with the coronavirus comes into your room, as it is impossible to tell if the purifier has sucked in the patient’s “exhalations” (when talking or coughing) in order to ‘isolate the coronavirus. Also, the patient may have touched things in your room and left a few more coronaviruses there. It is therefore not reasonable to deduce real protection from this. The Superior Health Council also concludes in this note he “There is no direct clinical evidence of the benefit of portable air purifiers in reducing the risk of transmitting infectious diseases”.
Secondly: the best, in such a situation, is of course to valves. Sciensano brought up the subject Many times. Ideally, you need industrial systems, such as in offices, that replace air continuously and quickly. At home, it is advisable to make strong drafts several times a day if the presence of the coronavirus is suspected. All this will be much more effective than a purifier which does not replace the air, but cleans it more or less quickly.
Thirdly: the importance of breathing clean air. In our regions, the quality of the outdoor air is generally good, but it becomes average or even bad in the main axes crossing large cities, or in areas with heavy industry (there is less and less, however). And breathing polluted air has serious consequences for the coronavirus. I have consulted several studies, especially in India where the air in cities is very polluted, and the conclusions are clear: the tissues of the airways swell when the air quality is poor (pollution over time, not in a few hours). These airways then become more fragile, and therefore more conducive to developing severe forms of covid-19. According to a study published in the specialized journal Cardiovascular Research; long-term exposure to air pollution would thus contributed at 29% of deaths due to Covid in the Czech Republic, 27% in China, 26% in Germany, 22% in Switzerland, 21% in Belgium, 19% in the Netherlands, 18% in France, 15% in Italy, 14% in the United Kingdom, 12% in Brazil, 11% in Portugal, 9% in Spain, 6% in Israel, 3% in Australia, etc.
In conclusion, a personal air purifier, no matter how advanced, will not succeed in capturing all the particles of the coronavirus, to the point where you will avoid catching it for sure. On the other hand, it will allow you to breathe healthy air at all times, which will prevent (if your environment is polluted) from weakening your airways, which has potentially serious consequences if you subsequently catch the coronavirus. And Dyson’s, although quite expensive, works really well, especially with its ability to suck in and release air in all directions, and to analyze air quality in real time to adapt.
An old and a new generation of Dyson purifiers