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