About Refrigerants

R-410 is the best air conditioner refrigerant

The cooling refrigerant is also an environmental and long-term consideration. R-22 (best known to the public as Freon, a DuPont product) is being phased out due to international accords. It contains hydro-chlorofluorocarbons that damage the ozone layer. A manufacturing by-product contributes to global warming. Until January 1, 2010, you can legally buy a new air conditioner that uses R-22. The EPA says that consumers who make that choice will still be able to buy replacement R-22 coolant until 2020.

Most central air conditioners now use R-410 instead, also known as Puron (a trade name of the Bryant corporation), which is less harmful to the environment. Some of the cheaper central AC units in most manufacturers' lines still use R-22, and while using R-22 may be less expensive in the short run, you might face premature repair or replacement issues. While R-22 may be produced for servicing existing equipment, manufacturers could choose to discontinue it. At best, diminished supplies will result in higher prices. For those reasons, most experts and environment advocates say you should opt for a central air conditioner that uses R-410.