What does the term 'flammability' mean in refrigerant context?

In the context of refrigerants, 'flammability' refers to the ability of a substance to ignite and burn when exposed to a source of ignition in the presence of air. This characteristic is crucial for assessing the safety of refrigerants, as flammable materials pose a significant risk in environments where they are used, especially in refrigeration and air conditioning systems. Understanding the flammability of a refrigerant helps technicians and engineers choose appropriate chemicals that operate safely in various applications without posing fire hazards.

The other options describe different properties of refrigerants but do not relate directly to their ability to catch fire. For instance, the efficiency of cooling or the condensation process does not inherently indicate a refrigerant's flammability, nor does resistance to pressure. Therefore, the term 'flammability' is specifically aligned with the capacity to ignite and sustain a fire in the presence of air, making it essential for safe handling and application in the refrigeration industry.