Friday, July 13, 2018

Ultraviolet Light in HVAC Systems

Mold, mildew, and dangerous diseases, such as Anthrax, Influenza, Measles, Smallpox, and Tuberculosis, are often spread through airborne transmission. Mold spores easily disperse, wreaking havoc in the new environments they land upon. A solution to continuously combat harmful organisms is the introduction of ultraviolet light disinfection. Ultraviolet light is divided into UV-A, UV-B and UV-C rays. It is the wavelengths in the UV-C spectrum, specifically 265 nm, that offers the greatest germicidal potential.  When a microorganism is exposed, the nuclei of the cells are altered due to photolytic processes. This process prevents further replication and causes cell death.

Ultraviolet light disinfection systems can be placed directly within HVAC ducts to both eliminate and prevent mold, mildew, and other organisms from forming and spreading.  Unlike HEPA filters that solely trap organisms, allowing them to flourish and possibly be re-released into the environment, UV-C kills organisms, eliminating that risk. Placing UV-C disinfection units within the HVAC system provides a continuous disinfection cycle with no harmful effect to anyone present in the space.  Units can be placed in the supply and the return to maximize the benefits.  Units placed in the return ducts have an even greater benefit, because the slower air velocity allows for additional exposure time. Ultraviolet light disinfection is an easy, hands-off, chemical-free way to reduce the risk of mold and mildew from developing and the spread of disease causing airborne organisms.


Attend the upcoming UV Light for Healthcare webinar on July 19th and UV Light for the Life Science and Pharmaceutical Industries on August 7th to learn more.

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