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. This rule is effective on 11 May 2015. POC is Margaret Sheppard, Stratospheric Protection Division, Office of Atmospheric Programs, Mail Code 6205T, EPA, 1200 Pennsylvania Avenue NW., Washington, DC 20460; tel: 202-343-9163; fax: 202 -343-2338, email: sheppard.margaret@epa.gov (Federal Register; 10 April 2015 [Rules and Regulations], pages 19453-19501).