R22

R22 Refrigerant which is also known as HCFC-22, is the most common refrigerant in residential and commercial air conditioning, and some very large centrifugal chillers for air conditioning and industrial process cooling. It has also been installed more in refrigeration since the phaseout of CFCs, both as a pure refrigerant and in blends. R-22 can no longer be used in new equipment, but the available products can be used to service existing systems.