What refrigerant is commonly used as a replacement for R-12?

R-134a is commonly used as a replacement for R-12, primarily due to its lower ozone depletion potential (ODP) and overall environmental impact. R-12, a chlorofluorocarbon (CFC), was phased out because of its negative effects on the ozone layer. In contrast, R-134a, which is a hydrofluorocarbon (HFC), does not contribute to ozone depletion and was developed to meet the demand for refrigerants that comply with environmental regulations.

R-134a has physical properties that are suitable for use in refrigeration and air conditioning systems designed for R-12, making it a drop-in replacement in many cases. This compatibility helps facilitate the transition for technicians and users who might still be using older refrigeration systems.

The other refrigerants listed—R-22, R-410A, and R-404A—are used for different applications and purposes. R-22, while also a refrigerant, is more commonly associated with air conditioning and has a higher ODP. R-410A, a popular refrigerant for newer air conditioning systems, is a blend of HFCs and has a different pressure profile than R-12. R-404A is primarily used in commercial