Final Rule - Protection of Stratospheric Ozone: Listing of Substitutes for Ozone-Depleting Substances – Hydrocarbon Refrigerants
This rulemaking lists three hydrocarbon substitutes as acceptable, subject to use conditions, for ozone-depleting refrigerants such as CFC-12, HCFC-22, and R-502 in two end-uses: household food refrigerators and freezers and retail food refrigerators and freezers (stand-alone units only). The updates to the listings are as follows:
§ Isobutane (R-600a) as a refrigerant in new household refrigerators, freezers, or combination refrigerator and freezers;
§ R-441A as a refrigerant in new household refrigerators, freezers, and combination refrigerators and freezers; and
§ Propane (R-290) as a refrigerant in new retail food refrigerators and freezers (stand-alone units only).
· Under the Significant New Alternatives Policy (SNAP) program (Section 612 of the Clean Air Act), EPA reviews alternatives to ozone-depleting substances (ODS) to find substitutes that pose less overall risk to human health and the environment.
· These provisions are designed to allow for additional alternatives and do not impose regulatory burdens beyond use conditions designed to ensure safe handling of flammable compounds. The three hydrocarbon substitutes are not ozone-depleting, and they have low global warming potentials.
· Hydrocarbons are already widely used as refrigerants in refrigerators and freezers in Europe and Asia.
· Hydrocarbons have significantly lower global warming potentials than the ODS or hydrofluorocarbons (HFCs) currently used in these applications.