The Montreal protocol has been successful in enforcing the phase out of ozone layer damaging CFC’s and also the phasing out of HCFC in new equipment and insulation material. Although the chlorine free HFC refrigerants are non-ozone layer depleting, many have a high GWP (Global Warming Potential).
In the latest version of the EU F gas directive refrigerants and there are now bans on substances with a GWP above 2500 and a reducing production cap for substances above GWP 150.
Refrigerants under development are unsaturated HFC’s (HFO’s) and natural refrigerants such as Carbon Dioxide.
Key Issues are:
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