For many years, hydrofluorocarbon (HFC)-134a was the alternate refrigerant of choice to replace chlorofluorocarbon (CFC)-12 in many medium- and high-temperature stationary refrigeration, air ...

There is an estimated 900 million pounds of HCFC-22 installed in refrigeration and air conditioning systems in the United States. It is also estimated that 85 percent of this R-22 is installed in air ...