The Mobile Gassing Nozzle has been developed for room decontamination with H₂O₂ for pharmaceutical industry, livestock breeding, research plants, BSL3 and BSL4 laboratories as well as for hospitals, copious pharmacies and the food industrie. The mobile gassing nozzle works with an ISU Unit. Rooms which need to be treated for utmost effect and in irregular intervals can be sterilized and decontaminated with that system in a simply and economically.