R-22 https://www.minisplitairconditioningsystem.org/ Often referred to by a brand name like Freon® As of 2010, R-22 was discontinued for use in new air conditioning systems R-22 is a hydro-chlorofluorocarbon (HCFC) which contributes to ozone depletion R-410A Often referred to by a brand name like Puron® Has been approved for use in new residential air conditioners Is a hydro-fluorocarbon (HFC) which does not contribute to ozone depletion Will become the new standard for U.S. residential air conditioning systems in 2015