According to the Clean Air Act of 1990, Freon®-22* and other refrigerants will be phased out of use in the near future. As a result, homeowners will soon have to turn to Puron® refrigerant to maintain their indoor comfort. That's why Carrier has been designing and testing heating and cooling equipment that uses Puron, a refrigerant approved by the EPA to replace Freon-22. In fact, Carrier has been offering Puron-based systems in homes like yours since 1996, developing a complete line of products using the world's first, long-term solution to ozone depletion.