UVGI can kill pathogens, both on surfaces and airborne. Radiation in the UV-C frequency band is the most effective against germs. The risk of airborne COVID-19 transmission is greatly reduced.
We provide you with the ASHRAE Guideline Reducing Infectious Disease Transmission with UVGI (Ultraviolet Germicidal Irradiation).
Awareness of indoor air quality has increased substantially in recent years, and the systems that supply air to our living and working spaces are critical to the maintenance of a healthy indoor environment. Although 10% of the solar radiation is composed of UV light, virtually all of the sun UVC rays are blocked by the Earth ozone layer, so most UVC exposure is created by artificial means.
There are three types of UV light: A, B, and C, each representing a different section of the UV light spectrum. Type C, known as UVC, is the form used for the germicidal activity. When UVC light is used for this purposes, it is referred to as UVGI, ultraviolet germicidal irradiation.
UVGI kills microorganisms, including viruses, bacteria, molds, and other fungi by disrupting their DNA.
UVGI lamps are categorized by the internal pressure of the gas in the lamp. Low-pressure lamps are, by far, the most commonly used in HVAC systems.
Medium-pressure lamps are typically used where critical levels of disinfection are required.
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