The Troges compact air cleaner clean air loaded with intense odor with the photo-light oxidation from odor substances. The air of the room is drawn through the air cleaner and the intensive UV-light of the Fotozon lamp breaks up the protein chains and in the same time a small dose of activated oxygen is released. This activated oxygen reacts with the odor substances and is within a short time reconverted to plain oxygen. The compact air cleaners function with no chemicals,and produce no NOx.  The process is completely naturally and environmentally friendly. All residues are 100% biologically degradable.