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How to disinfect Air

What is UV Radiation?

All radiation is a form of energy, most of which is invisible to the human eye.
UV radiation is the only one form of radiation and it is measured on a scientific scale called the electromagnetic(EM) spectrum.
UV radiation is only one type of EM energy you may be familiar with.
Radio waves that transmit sound from a radio station's tower to your stereo,
or between cell phones; microwaves, like those that heat your food in a microwave over; visible light that is emitted from lights in your home; and X-rays
like those used in hospital X-ray machines to capture images of the bones inside your body, are all forms of EM energy. Source[https://www.fda.gov/radiation-emitting-products/tanning/ultraviolet-uv-radiation#UVC]

What are the different types of UV radiation?

The most common form of UV radiation is sunlight, which produces three main types of UV rays : UVA / UVB / UVC. UVA rays have the longest wavelengths, followed by UVB, and UVC rays which have the shortest wavelengths.
While UVA and UVB rays are transmitted through the atmosphere, all UVC and some UVB rays are absorbed by the Earth's ozone layer.
So, most of the UV rays you come in contact with are UVA with a small amount of UVB.
Like all forms of light on the EM spectrum, UV radiation is classified by wavelength.
Wavelength describes the distance between the peaks in a series of waves.
UVB rays have a short wavelength that reaches the outer layer of your skin(the epidermis).
UVA rays have a longer wavelength that can penetrate the middle layer of your skin(the dermis). Source[https://www.fda.gov/radiation-emitting-products/tanning/ultraviolet-uv-radiation#UVC]

Ultraviolet Radiation and Virus

UVC radiation is a known disinfectant for air, water, and nonporous surfaces.
UVC radiation has effectively been used for decades to reduce the spread of bacteria, such as tuberculosis.
For this reason, UVC lamps are often called "germicidal" lamps.
KPLAZER uses radiation to disinfect and inactivate viruses and bacteria in the air. UVC radiation has been shown to destroy the outer protein coating of particular virus, which is a different virus from the current particular virus.
The destruction ultimately leads to inactivation of the virus.
UVC radiation may also be effective in inactivating some virus, which is the virus that causes some diseases.
In addition to understanding whether UVC radiation is effective at inactivating a particular virus, there are also limitations to how effective UVC radiation can be at inactivating viruses, generally.
Direct exposure : UVC radiation can only inactivate a virus if the virus is directly exposed to the radiation.
Therefore, the inactivation of viruses on surfaces may not be effective due to blocking of the UV radiation by soil, such as dust, or other contaminants such as bodily fluids.
UVC radiation is commonly used inside air ducts to disinfect the air.
This is the safest way to emply UVC radiation because direct UVC exposure to human skin or eyes may cause injuries, and installation of UVC in an air duct is less likely to cause exposure to skin and eyes. Source[https://www.fda.gov/medical-devices/coronavirus-covid-19-and-medical-devices/uv-lights-and-lamps-ultraviolet-c-radiation-disinfection-and-coronavirus]
The electromagnetic spectrum of ultraviolet light can be subdivided in a number of ways.
The draft ISO standard on determining solar irradiances(ISO-DIS-21348) describes the UVA(400~315nm), NUV(400~300nm), UVB(315~280nm), MUV(300~200nm), UVC(280~100nm).