Which category suggests that a system failure poses no risk at all?

Category 4 is designated for systems where a failure poses no risk to patients or personnel. This classification indicates that the medical gas system involved does not affect patient care or safety, meaning that any malfunction in this category would not result in adverse consequences.

In practical terms, Category 4 systems are established around gases and systems that, when disrupted, do not compromise the healthcare environment or patient health. For instance, this could pertain to gases used for non-critical applications, which are not essential for life support or medical procedures.

Understanding this classification is crucial in the context of medical gas systems, as it aids healthcare facilities in prioritizing resources and safety measures based on the potential risks associated with system failures. It ensures that attention is directed towards more critical categories that could pose significant risks if compromised.