It has been pointed out that formaldehyde, which has been used to decontaminate rooms and isolators, has carcinogenicity. Instead, hydrogen peroxide gas is used in pharmaceutical factories and others. This equipment has many achievements in Germany and boasts high reliability. There are two models of hydrogen peroxide gas decontamination equipment. There are self-contained large MLT 15 mJ and moving small MLT 15iiJ. It is selected according to the capacity of the space to be decontaminated.