Ultraviolet germicidal irradiation (UVGI) is becoming increasingly popular across the globe, especially as a cost-effective alternative to chemical disinfection.
The emergence of COVID-19 has spurred a search for innovative technologies to help combat the spread of diseases and ensure Valley businesses are the safest and most welcoming for customers in the country. Ultraviolet germicidal irradiation (UVGI) has emerged as a technology that could have a significant impact. UVGI has been used for over 100 years to kill bacteria and viruses.
While hospitals have an immediate need to combat the spread of COVID-19, businesses across the Valley can look to adopting technologies such as UVGI as they find new ways of doing business. The proven application of UVGI technology offers the potential to keep customers of the Valley healthy and safe, not only in hospitals, but in schools, reception areas, retail establishments, nursing homes, churches, hairdressers, business offices and more. If you are looking to keep your personnel healthier and promote a safer environment for your customers, UVGI can quickly help your businesses by minimizing the spread of COVID-19. You might say UVGI is like a germ-killing super-ninja that trained for years to kill COVID-19 and every other virus and bacteria that it comes in contact with.
What is ultraviolet germicidal irradiation technology?
TVA recognizes the social health benefits of UVGI technology. UVGI uses UV-C light, which is a short wavelength ultraviolet light that has germicidal effects, and has been commercially available since the 1930’s when Westinghouse quickly commercialized the low-pressure mercury vapor germicidal lamp. However, UV-C has been in use since the late 1800’s when Niels Finsen began using UV rays to treat disease, for which he was awarded the Nobel Prize for Medicine in 1903. Despite this long history, cost can still be a barrier to market adoption. This is why TVA is offering standard incentives for duct-mounted UVGI systems. In other words, that is $30 per ton toward the purchase and installation of UVGI in your business’s HVAC ductwork system.
UVGI technology applications
Short wavelength ultraviolet light (UV-C)
Per the American Society of Heating, Refrigeration and Air-Conditioning Engineers (ASHRAE), UVGI systems must deliver a sufficient dose of UV-C rays to inactivate airborne microorganisms within a 2 ft (0.6 m) minimum irradiation zone down the length of the duct or plenum, providing roughly 0.4 seconds of exposure time in moving air. Properly designed high-intensity systems can achieve 95% disinfection rates.
In-duct installation provides for facility-wide airborne pathogen reduction and reduces contaminates settling on surfaces. Installing UV-C lamps in ductwork delivers around-the-clock disinfection. These units do not have seasonal dependence and can operate year-round.
*Pre-approval as well as other guidelines are required for the project to be eligible for incentives
**Location may be eligible if UVGI system near the coil is specifically designed for COVID-19 air disinfection. UVGI systems designed only for coil defouling are not eligible at this time.
Many new technologies and best practices are being employed to fight COVID-19. While TVA supports utilizing any proven methodology to fight the spread of this disease, our incentive offering is limited to in-duct UVGI and specifically does not include:
- Surface Irradiation (including mobile UVGI units, chemical treatments, etc)
- Fixed Upper Room Air UVGI
- Fixed Air Sanitizing UVGI
- UVC Light Fixtures
- Increased Ventilation
- Needlepoint Bipolar Ionization
- Bipolar Ionization
- Particle Excitation
- Hands Free “Touchless” Technology
- Temperature Kiosks
- High Volume Low Speed (HVLS) Fan and UVC fixture combo
- Photohydroionization (PHI)
- Photocatalytic Oxidation (PCO)