Is R-22 refrigerant still being made today and when will it no longer be produced Additionally what is the substitute refrigerant for older units that use R-22 now?

  HCFC-22 (also called R-22) and HCFC-142b are the next two HCFCs that the United States will phase out. The schedule to phase out HCFCs is: January 1, 2010   Ban on p…roduction and import of HCFC-22 and HCFC-142b except for continuing servicing needs of existing equipment January 1, 2015   Ban on sale and use of all HCFCs except for certain uses, including continuing servicing needs of refrigeration equipment January 1, 2020   Ban on remaining production and import of HCFC-22 and HCFC-142b After 2020, the servicing of systems with R-22 will rely on recycled or stockpiled quantities.   To use alternative refrigerants in existing equipment generally the equipment needs to be modified, (no substitutes)….......... (MORE)