What type of identifier does each refrigerant require?

Each refrigerant is assigned a unique identification number to ensure that it can be accurately tracked and managed throughout its lifecycle. This unique identifier is crucial for safety, regulatory compliance, and effective handling during the installation, maintenance, and disposal of refrigeration systems. It helps technicians and personnel quickly determine the type of refrigerant in use, its chemical properties, and any specific handling precautions or environmental considerations that may apply.

Unique identification numbers are standardized by organizations like ASHRAE (American Society of Heating, Refrigerating and Air-Conditioning Engineers) and are commonly referred to in the context of the refrigerant's chemical name or its global warming potential (GWP). This ensures consistency and safety in the industry.

Other choices, while they may represent aspects of refrigerant management or handling, do not serve the primary purpose of uniquely identifying each different type of refrigerant, making a unique identification number the correct choice.