New AC units use Puron for cooling and no longer use R22.  By the year 2020, the EPA plans to stop all R22 manufacturing.  Regular maintenance checks are really important to help reduce your AC unit’s need for R22.  A HVAC tech can spot small leaks and fix them without having to replace any R22.  R22is getting a lot more expensive and harder to get a hold of.  Air conditioning repair in Denver can help!