DIN/TS 67506 for the combat of viruses with UV radiation
Regular airing is a duty in the Corona pandemic. An adequate complement are compact UV-C secondary air devices – an effective option in the indoor fight against bacteria and viruses. Correctly applied they eliminate germs in a short time and improve room hygiene. An interdisciplinary team in the DIN standards committee for lighting technology (FNL) has developed the technical specification DIN/TS 67506 “Disinfection of room air with UV radiation – UV-C secondary air units“. The document has been published with an issue date of February 2022 and aims to support in the conception, testing and application of UV-C air purifier. It describes the requirements for devices with an active ventilation. The specification allows producers to prove the effectiveness and safety of their devices. And in addition it offers designers and deciders criteria for selection and deployment.
Efficacy with single radiation
The key measurement for the deactivation of microorganisms it the UV dose (Fluence) which acts on the aerosols during the single flow of room air through the irradiation chamber in the device. The dose size depends on the type of microorganism to be eliminated.
Effect in the room
Multiple recirculation of the air can further reduce the load. The “Hygienic Air Delivery Rate“ (HADR) indicates how many cubic meters of disinfected air the device produces in an hour. A known room size enables the calculation of the theoretical number of air exchanges for a particular device.