Frequently Asked Questions
UVC sanitation devices use UVC light in the 254nm wavelength to disinfect surfaces and the air. UVC light is ultraviolet radiation in a short wavelength between 185nm to 280nm (nm = nanometer) range. This range of light is used primarily for germicidal action to break down RNA and DNA, preventing replication of pathogens. Sun Supplies UVC devices utilize the optimal germicidal wavelength of 254nm in three different configurations depending on the needs of our clients: Handheld units, Upright mobile units or Furnace duct units.
UVC sanitation works by either producing ozone and free radicals that travel in air to damage the pathogens, or as UVC photons directly impacting the pathogens, damaging their DNA and RNA. Our devices do NOT produce ozone as they are in the 254nm wavelength for optimal germicidal action.
185nm is a short wavelength, it produces ozone and it travels through the air in a very short distance; which means can not directly impact the pathogens. 222nm can destroy pathogens with limited travel through the air while producing the least damage in human skin and eyes. Its penetration capability is very short, that is why it causes the least damage to human eyes. 254 nm is the most effective in penetration as well as in kill rate without ozone production. (Ozone produces reactive oxygen species that travel in air for sanitization process, however, exposure is not recommended for humans and not permitted in UVC products in Canada) 280nm is the border of UVB range, with much reduced kill rate.
It has been known for decades by researchers and scientists that germicidal ultraviolet light, also known as UVC can kill up to 99.9% of pathogens such as viruses and bacteria. The Center for Disease Control in the USA has endorsed the use of germicidal UV (GUV) light in hospitals in the early 2000s, and subsequently FEMA has endorsed it for use in buildings. More recently it’s been being utilized in hospitals to disinfect against COVID-19. In New York City the transit authority began using this technology on trains and buses in order to prepare for re-opening of the city and public services.
Evaluation of UVC Light-Emitting Device for Disinfection of High Touch Surfaces – International Journal of Environmental Research and Public Health
- UV-light cleaning shown to cut superbugs hospital-wide