Recently, the Environmental Protection Agency announced the final phasing out schedule of the production and importation of HCFC-22, also known as R-22. The order called for a rapid phase-out with no new, or imported R-22, being allowed in the United States after Jan. 1, 2020. Since 2015, production of R-22 has been cut nearly 90 percent. R-22 is being phased out because of its Global Warming Potential (GWP) and ability to deplete the ozone layer.
While this might be great for the environment, it is bad news for the millions of homes in Arizona with air conditioning systems built before 2010 when R-22 was still the refrigerant gas of choice. Read more here: