Quote Originally Posted by mikeinreco View Post
Although scheduled by the EPA for phase-out, R22 refrigerant may still be used in small refrigeration systems manufactured before 2003. As of 2010, recycled or saved stores of R22 are also available for use, but R22 is no longer produced or imported by chemical manufacturers in developed countries, such as the United States and Canada. R22 may be used in older refrigeration and air conditioning units as well. R134 was designed to replace HCFC refrigerants used in automotive air conditioning, refrigeration and air conditioning units to replace R22.



Read more : The Difference Between R134 and R22 Air Conditioner Refrigerants | eHow
The phase out schedule has actually been changed. See the attached link:

EPA Proposes Final R-22 Phaseout Timeline | 2013-12-30 | ACHRNEWS