Chlorodifluoromethane, better known as HCFC-22 or R-22 is the most common refrigerant used in residential air conditioning units. However, R-22 is currently being phased out in the U.S. due to its very high potential to exacerbate
read more …Under the Montreal Protecal, the U.S. Government, thru the E.P.A., set up guidlines and dates for the phasing out of R-22, or "Freon". As of Jan. 1, 2010, manufactures could no longer ship new units with Freon. By 2020, the mandate says that no Freon may be
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