Circulating-air sterilisers from orca GmbH are used in many of the large food production companies in Germany and Europe. A sterilisation technique based on UV light is used to inactivate bacteria and prevent germ accumulation. The equipment is integrated inside stainless-steel pipes made by JACOB, and the UVpro devices sterilise 50 to 850 cubic metres of air per hour, depending on the model. In cool rooms and storage rooms, they are suspended from the ceiling, which means they can also be easily retrofitted. They help improve product hygiene and extend the shelf life of products. During the corona pandemic, the circulating-air sterilisers are also useful in reducing the risk of infection for people working in the rooms. The optimised vortex system ensures that 99% of the bacteria and viruses are killed in just one pass.