How is the classification of refrigeration systems mainly determined?

The classification of refrigeration systems is primarily determined by the type of refrigerant used in the system. Different refrigerants have distinct properties, such as their potential for ozone depletion, global warming potential, and efficiency, which influence the design, application, and safety considerations of refrigeration systems. The type of refrigerant not only determines the system's classification but also affects compliance with various environmental regulations and standards.

While options related to cooling capacity, accessibility, and occupancy types may influence the design and application of refrigeration systems, they do not serve as the primary criteria for classification. Essentially, the refrigerant type plays a crucial role in how systems are built and operated, making it the primary categorizing factor.