Which refrigerant is known for being environmentally friendlier among common refrigerants?

R-134a is considered to be more environmentally friendly compared to many other common refrigerants primarily because it has a lower ozone depletion potential (ODP) and a relatively low global warming potential (GWP). R-134a does not contain chlorine, which is the element responsible for ozone layer depletion. This makes it a more sustainable choice in terms of protecting the ozone layer when compared to refrigerants like R-12 and R-22, which do contain chlorine and have significant negative environmental impacts.

In addition, R-410A, while being chlorine-free as well, has a higher GWP than R-134a, positioning R-134a more favorably in discussions about both immediate environmental impact and long-term climate considerations. These characteristics contribute to R-134a's status as a preferred refrigerant in many applications where environmental considerations are prioritized.