Hydrofluorocarbons (HFCs) is a halogenated gas and a replacement for ozone-depleting substances (ODS) like chlorofluorocarbons (CFCs) and
hydrochlorofluorocarbons (HCFCs). Most ODS’ are also potent greenhouse gases (GHGs) and this includes CFCs and HCFCs which are currently being phased out under the Montreal Protocol. HFCs, on the other hand, have zero ozone-depleting potential (ODP) but high global warming potential (GWP). HFCs have much lower GWP than CFCs but comparable GWP to that of HCFCs. For instance, the GWP of most commonly used CFCs — CFC-12 — is 10600; most commonly used HCFCs – HCFC-22 — is 1700 and most commonly used HFCs — HFC-134a — is 1300.

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