Which of the following is an HCFC refrigerant?

R-22 is classified as an HCFC (Hydrochlorofluorocarbon) refrigerant. HCFCs have been used widely in refrigeration and air conditioning systems due to their effectiveness while having a lower ozone depletion potential compared to CFCs (Chlorofluorocarbons). R-22, in particular, has been historically popular in residential and commercial air conditioning systems.

The other refrigerants mentioned are not HCFCs. R-134A is an HFC (Hydrofluorocarbon) and does not contain chlorine, which means it has no ozone depletion potential. R-32 is also an HFC and is recognized for its lower global warming potential. R-152A is a HFC as well, often considered for its energy efficiency and lower environmental impact relative to some other refrigerants, but it too does not fall under the HCFC classification. Understanding these classifications is vital for technicians, especially considering the regulatory environment surrounding refrigerants and their environmental impacts.