Protection of Stratospheric Ozone: Listing of Substitutes for Refrigeration and Air Conditioning and Revision of the Venting Prohibition for Certain Refrigerant Substitutes

Pursuant to the U.S. Environmental Protection Agency's (EPA) Significant New Alternatives Policy program, this action lists five flammable refrigerants as acceptable substitutes, subject to use conditions, in several end-uses: Household refrigerators and freezers, stand-alone retail food refrigeration equipment, very low temperature refrigeration, non-mechanical heat transfer, vending machines, and room air conditioning units. This action also exempts from Clean Air Act Section 608's prohibition on venting, release, or disposal the four hydrocarbon refrigerant substitutes listed in this action as acceptable, subject to use conditions, in specific end-uses. We are finalizing this exemption for those substitutes, subject to those use conditions and in those end-uses, on the basis of current evidence that their venting, release, or disposal does not pose a threat to the environment.