R22 is the name of a commonly used CFC refrigerant which has been banned in new air conditioning systems in UK & Europe since 2002 because of its ozone-depleting properties. Therefore although many are still in use, these ageing systems will, by law, become unserviceable at the end of 2014. At that point it will be illegal to repair them in the event of any failure. Spare parts and recycled R22 are already in short supply and increasingly expensive so, even now, it is often uneconomical to attempt a repair. Furthermore, modern replacement systems use environmentally responsible refrigerants and are up to 60% more energy efficient than R22 systems, meaning that they often pay back their replacement costs in energy savings alone within 3 or 4 years.