Which of the following is a common refrigerant type?

All of the options presented are indeed common refrigerant types, each with unique properties and applications in refrigeration systems.

Ammonia is a widely used refrigerant, especially in commercial and industrial refrigeration systems, due to its excellent thermodynamic properties and efficiency. It is a natural refrigerant, which means it has a lower impact on the environment, particularly in regard to ozone depletion. However, it is toxic and requires careful handling.

Propane is also recognized as a refrigerant, particularly in smaller refrigeration applications and in eco-friendly systems. Its low global warming potential makes it an attractive option for systems that prioritize environmental sustainability. It operates effectively over a wide range of temperatures, making it suitable for various applications.

Chlorofluorocarbons (CFCs) were once the most common refrigerants used in air conditioning and refrigeration systems. However, due to their significant ozone-depleting properties, their use has been largely phased out in favor of refrigerants that are less harmful to the environment. Despite this, they remain a historical standard and are still relevant when discussing refrigerant types.

Combining all these, the answer encompasses the wide variety and evolution of refrigerants, illustrating how each has played or continues to play a role in the refrigeration