A dry disinfection device for disinfecting air, the device comprising at least a process chamber 6 that comprises at least a UV radiator 2 arranged to emit at a first wavelength and arranged to produce ozone, as well as an ionizer 1 arranged to produce ions into the process chamber. The process chamber 6 also comprises a UV radiator 3 arranged to emit at a second wavelength, the second wavelength being different from the first wavelength.
