Is turning on the air purifier useful for preventing coronavirus infection?

Is turning on the air purifier useful for preventing coronavirus infection?

In order to answer this question, we must first understand why we wear masks, and why masks are useful for “coronavirus”.

Whether it is N95, N90, the national standard KN series, or the Korean KF series, these masks can effectively prevent the virus from invading our respiratory tract. N95 means that the filtering effect of 0.3-micron particles has reached 95%, and N90 is 90%. In fact, it is not us who need N95 or N90, but the medical workers on the front line of epidemic prevention. For us who just go out to dump garbage, medical disposable masks are completely sufficient.


What masks to wear is primarily based on our exposure risk? For doctors and nurses who are treating patients with “new coronary pneumonia”, these high-risk groups are only necessary to wear medical N95 or N95. Whether it is going to throw trash, take delivery, takeaway, or even commute to work, these are low exposure Risk, let ’s not compete with the white angels on the front line for valuable protection resources, shall we?

So, is the air purifier useful?

It works.


If you admit that masks are useful, can’t you deny that air purifiers are also useful. Because the principles of the two are basically the same, and the filtration efficiency of the air purifier is better.


The core filters of air purifiers on the market are basically HEPA, which is not less than 99.97% for 0.3-micron particles, and the N95 just mentioned is 95%. So, masks can filter out viruses, and air purifiers are certainly more capable.


Most purifiers use HEPA filters

Because neither of the two filters is a virus, but a vector carrying the virus.

Yes, a virus usually needs a vector if it wants to spread.

Whether it is droplet transmission, contact transmission, or aerosol transmission, the virus has one root cause, that is, droplets produced when a patient speaks, coughs, or sneezes.

In the picture above, the green droplets are the “droplets” that are repeatedly popularized, while the red droplets are the “droplet cores”, which are also aerosols. Aerosol viruses, like small droplets, float in the air in the form of particles, and the size of the particles determines how far the virus spreads. The smaller the particles, the farther they spread.


A normal person sneezes, hundreds of millions of viruses are ejected by the strong pressure of the respiratory tract, droplets larger than 10 microns will soon fall within a distance of 1-3 meters, but the droplet core can be scattered at 9-10 In the air within meters.


Do not be afraid, whether it’s droplets or droplet cores,

Both are within range of masks and air purifiers.

The diameter of the droplets is generally above 10 microns and will settle to the ground, while the diameter of the droplet cores that stay longer in the air is generally about 0.5 to 5 microns. In other words, whether it is droplets or droplet cores, masks and air purifiers that can effectively filter particles of 0.3 microns can effectively filter.

Therefore, it is effective for air purifiers using HEPA filters.

At the moment of the epidemic, we can use masks and purifiers together,

Wear a mask outside and turn on the air purifier at home.

Provide more comprehensive protection for our respiratory health.


Guangzhou olansi healthcare group has more than 10 years experiences in the filed of air treatment in China. They have exported millions of products to the oversea market already. Olansi worked with many brands at home and aboard. For more information about olansi, please refer to

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