Why is R-22 Being Phased Out and What Will Replace it?

R-22 is rated to have both high Ozone Depleting Potential (ODP) and high Global Warming Potential (GWP). While it is still widely used in developing countries, the United States and other countries have imposed regulations governing its use and import until it may be completely phased out. There is a target date of 2020, before which time it may be used to maintain existing AC units. Another substance in use, R-410A, has a negligible ODP rating, but is still considered to contribute to global warming. A greener gas known as R-407C is being used in Europe but is not currently available in the United States. While propane can act as a refrigerant, consumers are strongly warned against its use in AC units due to its highly flammable nature.

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