UK: +44 1379 658 721
Ireland: +353 89 221 3723
USA: +1 754 252 3536
Middle East - N. Africa: + 971 52 873 4738
Australia: +61 3 9310 5259
We talk about killing covid using a certain powerful wavelength of UVC light. But we’re not the only ones discussing the power of UV. UV light has been used to inactivate a multitude of unpleasant and sometimes deadly viruses and other pathogens for decades. So what does the highly respected US Centers for Disease Control and Prevention or CDC say about UVC as a covid killer? As it turns out, they’re on our wavelength!
The facts about Ultraviolet Germicidal Irradiation
Ultraviolet germicidal irradiation, also called UVGI, involves using UV energy to kill viruses, bacteria and fungi. It’s all down to special light fixtures that generate UV-C energy, a shorter wavelength than the more penetrating, more dangerous UV-A and UV-B rays.
‘Upper-room UVGI’ describes a clever UV disinfection zone located above people’s heads in rooms. The layer of invisible light kills airborne pathogens without directly exposing people in the room to U radiation.
So how does Upper-Room UVGI work?
It goes like this. Air moves through the disinfection zone and any airborne pathogens are killed as soon as they get the right dose of UV. While the virus particles stay in the air they’re harmless because they can no longer cause infection. These systems deliver an air change rate per hour similar to bringing in clean air.
What are the recommended settings for upper room UVGI?
Upper room UVGI isn’t needed in open-air environments. It also shouldn’t be necessary if the HVAC system does the job it has been designed for.
The CDC recommends upper air systems for ‘high-risk indoor settings’ like hospital waiting rooms, where there are likely to be viruses and other pathogens in the air, and in crowded places where people’s health might be compromised, for example libraries, the lobbies of public buildings, and homeless shelters.
These systems are also ideal for places where people can’t avoid taking their masks off indoors, like cafeterias, staff rooms, and restaurants. They make sense in an area where people find it hard or impossible to stay six feet apart. And they’re a good solution in places where there isn’t an existing mechanical HVAC system or the current HVAC system isn’t up to standard.
UVGI has been used safely for more than 70 years
Upper-room UVGI has been used for more than 70 years to kill airborne pathogens. Since the 1950s the technology has mostly focused on controlling TB. There’s a vast reservoir of research around the design, installation, testing, and safe operation of these systems, all science-based and reliable. So far the research on UVGI and covid reveals the virus needs a very similar dose of UVC as the other coronaviruses the light kills effectively: MERS, SARS, seasonal flu and more.
The CDC concludes upper-room UVGI systems can be used to control covid as a
‘useful ventilation tool to consider in reducing the spread of infectious pathogens’
How to install and maintain an upper room UVGI system
These systems are usually custom designed for the space. It’s essential to get everything fitted and tested by a reputable UV-system manufacturer like us, or a professional fitter used to working with these systems.
A typical 500 square foot room tends to require 2-3 of our affordable UVC upper air light fittings. Once installed there’s practically no maintenance except when the long-lasting LED UV lamps need replacing, usually every x
(Col, can you add in the time they last?)
If the lamps get dirty in situ you can wipe them clean with ordinary rubbing alcohol. Anything else and you’ll need a maintenance expert who’s trained in UVGI systems.
Keeping people safe in the space
Our UVC disinfection lamps and machines are designed with care and attention to detail, with all the safety features you need to ensure safe operation. If you’d like a demo,
click through to this page where you can watch our YouTube video revealing the Cool Tech CT-X2 UVC LED steriliser in action.