Which types of refrigerants may be used in small appliances in recreational vehicles?

• A. R-12, R-134A, R-600A
• B. Ammonia, hydrogen, and water
• C. R-410A and R-22
• D. Only R-22

Answer: (B)

In small appliances used in recreational vehicles, refrigerants that are commonly utilized include ammonia, hydrogen, and water due to their natural origin and lower environmental impact. Ammonia is particularly notable as it has excellent thermodynamic properties and is effective for vapor-compression refrigeration systems.

Hydrogen, while less commonly used in refrigeration, can play a role in certain specialized applications, especially when combined with other processes. Water is also a natural refrigerant, often utilized in absorption refrigerators. Collectively, these substances serve as alternatives to conventional refrigerants, offering a more environmentally friendly approach.

The other options include refrigerants like R-12, R-134A, R-410A, and R-22, which are synthetic and often associated with ozone depletion or global warming potential, making them less suitable for use in small appliances in RVs where energy efficiency and environmental safety are prioritized. The focus on natural refrigerants aligns with contemporary environmental regulations and consumer preferences for sustainable technology.