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Nowadays, air purifiers are used at several places to kill the harmful pollutants present in the environment. These air purifiers use various forms of filters that help in purifying the air that goes through them. Among four common UV lights, the UV-C is technically preferred for air purifiers, while others include UV-A, UV-B, and UV-V. These ultraviolet radiations differ from each other concerning their wavelengths. UV-C is environment-friendly and safe for humans and pets, but only until they are not in direct contact with the light, but it may increase the Ozone level.

Basically, UV-C light is a  naked eye invisible light that forms electromagnetic radiation with wavelengths anywhere between 200 to 280 nm. It’s limited in its reach and used to kill germs, bacteria, and other small organisms. A specially designed bulb is used that emits light of specified nm. 

You might also like our recent blog posts on the Air Purifier Vs Dehumidifier and How Do Air Purifiers Work? available on a separate page.

How Does UV-C Filter Work?

UV-C filters are designed to destroy the bacterial viruses and various other microorganisms present in the environment. The ultra-violet filter, along with the strained air system, forms a UV air purifier.

The air in the atmosphere enters into the system and goes into the chamber where the bulb generates the light in UV-C frequency. The UV light kills micro-organisms present in the air as they pass through the UC-C filter.

Are They Harmful To Human Beings?

The best thing about UV-C radiation is; its absorption length in human skin is quite short. This prevents the radiation from reaching the living cells. Also, the light bulb that produces the UV radiation is fixed inside an air purifier, making it nearly impossible for a household user to be exposed to these radiations.

In this manner, the UV-C light filter is not harmful to human beings, but other things make it a bit dangerous if used quite often.

All the ultraviolet radiation, including the UV-C radiation, emit an amount of Ozone. We all know that Ozone is quite dangerous to our respiratory system. It can cause several breathing problems and is very harmful to people who have asthma. This is why various air purifier companies have stopped using UV-C light.

Are There any Standards to Follow?

There is no specific standard for ultraviolet radiation filters that can tell about the effectiveness of UV air purifiers. But some air purifiers use UV-C light filters and are considered the most effective air purifiers in the world.

These include Bio-Shield UV-C Air Purifier System, Speeds Plus UV-C Air Sanitizer, Germ Guardian Pluggable UV-C Air Sanitizer, and others. Although these are considered to be the top UV filter air purifiers still, nowadays, some companies refuse to use UV-C filters in their brands.

According to them, although these filters can purify the air yet, they cause harm human beings. Among these companies, Oransi and Molekule PECO technology are at the top of the list.

What re the Pros and Cons of UV-C Light Filters?

There are some very basic pros and cons of UV light filters recognized by almost every air purifier company.

Pros

Some of the benefits of UV-C light filters include:

  • Destruction of microorganisms: One of the best features of these UV-C light filters is that they effectively get rid of bacteria and viruses present in the air. By killing these microorganisms, they save people from a lot of troubles.
  • No more mold: Another important feature of the UV light filter is that they help eliminate the mold permanently. Dead or alive mold is very dangerous to humans.  UV-C light filter ensures that none of it survives.
  • Silence is maintained: Last but not least, these air purifiers do their work silently without creating any disturbance or noise. They will be killing the bacteria all along, and you won’t be able to realize that because of the silence they maintain, the fan that pushes air through the system makes some noise.

Cons

Unfortunately, UV filter light has more disadvantages than advantages.

  • It is very expensive: UV-C light filters are very costly, which is why not everybody can afford them.
  • Unable to get rid of allergens or dust particles: The worst thing about the UV-C light filters is that they may kill the bacteria or viruses present in the air. Still, they cannot destroy the dust particles of dust mites present in his atmosphere. But only when you are limited to only UV filters, but when an air purifier uses a combination of filters, and these are fitted in serious, then yes, it’s most effective.
  • High power consumption: Not only are these filters expensive, but they also consume a lot of power. A middle-class man cannot afford them.
  • Cannot get rid of VOCs: These filters, no matter how effective they are, cannot destroy the volatile organic compounds present in the form of gases.

What We Think About It

Although the UV filters are used to eliminate the harmful microorganisms present in the environment, their effectiveness is still not proven. UV filters remain in service for a long time, but recent studies are not in their favor, and hence many renowned air purifier manufacturers stop using UV-C filters. Their cons are quite higher than the pros.

You may use them, but as they emit ultraviolet radiation, that is why it is advised by most of the companies to avoid its excess usage. The house where families spend most of their time should not be exposed to Ozone.

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