Call for 24 hour air conditioning repair Denver anytime for service.  Take the time to ask about the new refrigerant standards that  have been mandated.  We can advise you about choosing a new unit, or change your unit over to using Puron instead of Freon (R-22).  Puron is a great way to “go green” with your air conditioning unit because Freon (R-22) is considered a greenhouse gas.  This would mean that we will need to change the outdoor unit condenser, the evaporator coil,  possibly the refrigerant copper line set, or at least have them properly flushed.