Providing services in the field of technical building hygiene. In particular, comprehensive hygiene analysis and hygiene consulting around air conditioning systems and water supply as well as a guideline-compliant hygiene inspection of these systems. Operating laboratories and carrying out chemical and mineral-biological investigations. Investigation of the Sick Building Syndrome and showing causes as well as possible solutions to remedy this syndrome. Training of hygiene specialists and, among other things, selling test kits for independent hygiene checking.