The U.S. Environmental Protection Agency’s (EPA) Significant New Alternatives Policy (SNAP) is a program to evaluate and regulate ozone-depleting and high global-warming potential (GWP) chemicals as authorized by the Clean Air Act (CAA). As part of the SNAP program, the EPA both approves new and delists (i.e. deems unacceptable for use) existing refrigerants used in various end-use applications, including the food retail and food service sectors.