After passing through the filter, the air is treated with UV-C radiation. The special Philips UV-C lamp in the unit generates an ultraviolet radiation with a wavelength of 253.7 nanometres. The UV-C light destroys viruses, bacteria, moulds and other primitive organisms. The radiation damages the DNA structure of micro-organisms and prevents their reproduction.

The special aluminium interior of the housing provides additional reflection of the UV-C radiation, thereby increasing the efficiency of the UV-C radiation up to 50%.