CURRENTLY, HEATING AND AIR MANUFACTURERS OFFER R-22 FREON/REFRIGERANT SYSTEMS, WHICH IS WHAT HAS BEEN INSTALLED IN 75% OF HOMES TODAY.  IN 2010, THESE MANUFACTURERS WILL ONLY BE OFFERING SYSTEMS THAT REQUIRE R-410A (PURON) REFRIGERANT.  PER THE EPA, R-22 WILL NO LONGER BE AVAILABLE FOR NEW INSTALLATIONS AFTER THE NEW REGULATIONS ARE IN PLACE.  BECAUSE OF THIS DIP IN DEMAND FOR R-22, ITS PRICE FOR USE IN REPAIR, WILL INCREASE TREMENDOUSLY.  WE RECOMMEND THAT AN R-410A SYSTEM BE INSTALLED, IF AN OLDER R-22 SYSTEM IS NOT HEATING OR COOLING PROPERLY BECAUSE OF THE PHASING OUT OF R-22 REFRIGERANT.  FEEL FREE TO CONTACT US VIA PHONE OR EMAIL FOR MORE INFORMATION.  THE EPA HAS AN ARTICLE ON THIS INFORMATION: http://www.epa.gov/Ozone/title6/phaseout/HCFC_Report.pdf