New Heraeus study confirms: UV-C air purifiers destroy viruses immediately and very reliably at high air flow rates

Hanau, 18.11.2020

Study confirms 99.999% air purification with UV-C from Heraeus

Soluva Air M

Heraeus Noblelight, together with the hygiene institute biotec GmbH, proves the complete destruction of viruses in UV-C air purifiers. The biotec report shows the tested UV-C device eliminates 99.999 percent of the surrogate viruses. "The result exceeds our own expectations and underlines the fact that Heraeus UV-C technology is a very effective technology for combating the Corona Pandemic," says Martin Ackermann, Managing Director of Heraeus Noblelight, a world leader in specialty lighting applications. In addition no ozone could be detected during the independent qualification.

Log 5 cleaning even at very high air flow

The test examined the inactivation of the RNA virus MS2 after it passed through the UV-C system at a high air flow rate of around 1500 cubic meters per hour. These viruses are used as a surrogate for the corona virus. "The research project carried out shows a very high inactivation rate for the surrogate virus MS2. A reduction by 5 log levels could be demonstrated, which corresponds to an inactivation rate of 99.999 percent", the biotec study concludes.

"The biotec study also confirms our simulations for installations of UV-C devices in buses", says Ackermann. "There we proved an inactivation rate of 99.99 percent (log 4) of the viruses in the air within five to six minutes at an air volume flow of 2000 cubic meters per hour - this air flow corresponds to the ventilation system in a typical city bus".

Study confirms own simulation for use in buses

A Soluva Air M UV air purifier in the gym

The tested unit, called Soluva Air M10, is suitable for rooms with high ceilings (from three meters) and suitable for use in large retail stores, factories, warehouses or theaters, museums or galleries. The UV devices used in the city of Hanau buses work according to the same principle as the Soluva Air M10. "Whether in public transport, in schools or in large companies, Heraeus wide range of UV-C devices enables solutions tailor-made for every room," says Ackermann. "We will continue to research and collect evidence to prove our products work in real life as they do in our simulations".

Recently, the Hanauer Straßenbahn (HSB), a local public transport company in Hanau, Germany, retrofitted its first public bus with UV-C air purifiers. "The biotec study confirmed our exceptations for air purification," says Ackermann. "Our own simulation shows that Soluva UV-C light purifies 99.9% of the air in a normal city bus in just five to six minutes".

In just six weeks Heraeus Noblelight worked closely with HSB to develop a certified UV retrofit solution for the ventilation system of the city buses. The conversion time per bus is only two to three hours for the UV-C lamps. The city plans to retrofit additional buses including articulated buses in the next few weeks. The units are CE-certified and successfully passed the VDE Institute testsings. By year end, up to 15 buses will have this pioneering technology. With few modifications, the solution is suitable for retrofitting all bus types worldwide.

UV-C air purifiers are safe, economical and low maintenance

Ultraviolet (UV) light is part of the natural light spectrum. A wavelength of 254 nm (UV-C), reliably destroys the genetic material of viruses as proven in several scientific studies. In use for decades, UV light purifies drinking water, the air in airports and the surfaces of packaging, including baby food containers. UV-C light disinfection is chemical-free, ozone-free and does not use filters. In addition, viruses cannot build up resistance to UV. Professional UV-C solutions do not emit UV rays which could harm occupants. "Our UV light solutions are absolutely safe, economical, handy and quiet - household electricity is sufficient. Our devices can therefore be used in occupied classrooms, stores, practices, law firms or public spaces," explains Ackermann.