Which type of refrigerant contains no chlorine?

HFCs, or hydrofluorocarbons, are a class of refrigerants that do not contain chlorine. This absence of chlorine is significant because it means that HFCs do not contribute to ozone depletion, which is a critical concern in environmental science and regulations regarding refrigerants. HFCs have been introduced as replacements for CFCs and HCFCs, both of which contain chlorine and have been associated with harm to the ozone layer.

Understanding the environmental impacts of refrigerants is essential in selecting appropriate refrigerants for various applications. HFCs are often viewed as a more environmentally friendly option compared to their predecessors like CFCs and HCFCs, which are notorious for their ozone-depleting properties. This characteristic makes HFCs a preferable choice in modern refrigeration and air conditioning systems, aligning with international efforts to phase out substances that damage the ozone layer.