When buying air purifiers, we recommend that you remember "2 do not choose"

1. Do not blindly select air purifiers with high CADR value

First of all, let's talk about the misunderstanding that many people have about air purifiers. Most of the online air purifier purchase guide content will say that "the higher the CADR value, the better", but from my personal research on air purifiers, this is not the case.

Although CADR represents the purification efficiency of the air purifier, it is true that the higher the value is, the higher the purification efficiency is, but it cannot be one-sided considered that the higher the CADR value is, the better.

On the one hand, it is meaningless to compare the CADR value alone. It must be combined with the specific purification technology, filter material and another key parameter CCM value. On the other hand, instead of understanding the CADR value as purification efficiency, I think it is more appropriate to simply understand it as "inlet air volume".

If you have known about air purifier products, you should find that many air purifiers priced at 1k-2k or even hundreds of yuan have a lower CADR value than air purifiers sold thousands of dollars. That is because the CADR value can be artificially "brushed higher" by some methods, such as reducing the resistance of the filter screen, increasing the inlet air volume of the fan, and so on, at the cost of higher noise and shorter filter life The purification capacity (CCM value) is reduced. At the same time, if the filter element has been saturated, even if the CADR value is higher, the air purification will not have any purification effect.

2. Air purifier without pure physical adsorption technology

The purification technology of the air purifier directly determines the purification effect of the air purifier. At present, most of the mainstream air purifiers on the market, especially the middle and low end air purifiers, are pure physical adsorption technology of HEPA+activated carbon. This type of technology has the advantages of high purification efficiency and low cost, but its disadvantages are also obvious. It can only adsorb pollutants and can not completely purify them, and it needs to replace the filter element regularly It is easy to cause secondary pollution.

When buying an air purifier, we recommend that you keep in mind that "2 do not choose" is the experience of changing two sets

Some friends may ask, why does this technology have so many disadvantages, but it is still mainstream? The reason is very simple. First, the lower cost meets the commercial needs of most low-end products; Secondly, from the perspective of parameters, such products are not at a loss, and can even compare with many high-end products, creating the illusion of "low price and good quality"; The most important thing is that the filter element needs to be replaced frequently to make further profits.