Do Air Purifiers Really Remove Virus?

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Quick Answer: Do Air purifier Really Remove Virus?

The effectiveness of air purifiers in removing viruses from the air depends on the size of the virus, the technology used in the air purifier, and the design of the purifier. Purifiers with a HEPA filter are effective against viruses that are larger than 0.3 microns, while the effectiveness against small ones varies across filters. Well-designed UV-C radiation purification systems are also very effective against viruses.

A variety of air purifiers are available in the market which use different technologies and has varying capabilities and efficiency.

Different types of air purifiers have their own sets of advantages and disadvantages and might be effective against certain types of pollutants and ineffective against other types.

This article will look at the ability of various types of air purifiers in removing and dealing with viruses.

What are Viruses?

Viruses are microscopic parasites, that are usually much smaller than bacteria. Viruses cannot reproduce outside of a host body and each virus has a narrow range of hosts.

Once a virus infects a host cell, however, it can use the host cell machinery to produce more viruses.

Viruses can infect plant and animal cells and virus infection can cause diseases in the host.

Some of the more common virus-caused diseases in humans are measles, chickenpox, HIV AIDS, and more recently COVID-19, etc.

Viruses are naturally occurring and are considered as existing on the border of things that can be classified as living. Some viruses have been synthesized by scientists for various scientific purposes.

Viruses contain DNA or RNA, but they cannot independently act on the instructions contained in these nucleic acids and uses the host cell machinery for protein synthesis and reproduction.

How Air Purifiers Can Benefit in Removing Virus

A large number of viruses are found in the air and many of these airborne viruses can cause diseases in human beings and pets. Thus removing them from the air is important.

Air purifiers can be helpful in removing airborne viruses. Different types of air purifiers have different levels of effectiveness against viruses.

The effectiveness against viruses depends on the size of the virus as well as the technology used in the air purifier.

Well-designed UV-C radiation-emitting air purifiers are effective against viruses, while HEPA filters are also effective depending on the size of the virus and the filtration efficiency for particles that are smaller than 0.3 microns.

In general air, purifiers help in removing viruses by either trapping them in filters/barriers or by killing or making them inert through physical and/or chemical processes.

What kind of Air Purifiers Work Best for Viruses

While air purifiers are useful in removing viruses from the air, it should be kept in mind that all air purifiers are not the same.

Some are much more effective at removing viruses than others, while other types of air purifiers might be ineffective against these types of pollutants.

Most viruses vary in diameter from 20 nanometres (0.02 micrometer) to 250–400 nm (0.25 micrometer–0.4 micrometer); the largest measure is around 500 nm (0.5 microns) in diameter.

This information should be kept in mind while looking at the effectiveness of various types of air purifiers against viruses.

This section will take a look at various types of air purifiers and their suitability for removing dust and dust mites.

Air Purifiers with HEPA filters

HEPA filters will remove 99.97% of viruses that are above 0.3 microns and can remove smaller ones but no guarantees can be provided regarding efficiency.

A recent NASA study revealed that HEPA filters are quite capable of capturing ultra-fine particles below the 0.3-micron size.

Thus it is possible that HEPA purifiers might efficiently capture viruses. Since any viruses are at the lower end of a HEPA filter’s range, the efficiency in removing viruses varies from purifier to purifier.

UV-C Air Purifiers

Properly designed UV purification systems can effectively remove bacteria and viruses from the air.

The most important thing is to make sure that the purifier exposes the air long enough to the UV light to ensure that the microbes are destroyed.

None of the other air purification technologies available in the market are as effective as UV purification when it comes to bacteria and viruses.

The effectiveness of UV light in destroying this kind of microscopic pathogens have been well established.

Hybrid Systems

Air purification systems that combine HEPA filters and UV-C radiation are extremely effective against viruses. Such systems are the most effective option for removing airborne viruses.

Ozone generators, Carbon filters, and Ionizer purifiers

Ozone generators, carbon filters, and Ionizer air purifiers are generally ineffective against viruses are not recommended for removing airborne viruses.


We hope that this article has helped you in creating a clear picture of the role of air purifiers in dealing with viruses and the various benefits and limitations associated with different types of air purifiers while dealing with these

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