In order to limit environmental impact, improve operational safety, and reduce the maintenance, operation and manufacturing costs of sterilization facilities for health, medical or pharmaceutical products using ethylene oxide as an active agent, It is suggested to add an internal air treatment device of the main shell (1) on the rigid and sealed main shell (1), which has at least one suction and compression device (7) and at least one membrane separator (5), and the membrane separator (5) can separate oxygen molecules and molecules Nitrogen,The device is configured to reintroduce only nitrogen molecules into the main housing (1). Means (3 and / or 14) for introducing ethylene oxide as a gas into the main enclosure (1) are also provided, andHeat (24) so that the internal atmospheric temperature of the main housing (1) is at least 45 ° C. The invention also describes and claims to protect a secondary housing (18) equipped with a device (17) for changing its internal temperatureThe secondary housing (18) is used to separate the EO / water mixture from nitrogen and store the mixture in liquid or solid form between each filling and use cycle of the main housing (1). The inner atmosphere management of the main shell includes reducing the rigid stress of the shell and using olfactory tracer.
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