The EPA’s SNAP (Significant New Alternatives Policy) program, which lists refrigerants that can be used in place of R-22, has approved R-290 (propane) for new food self-contained units, as well as carbon dioxide (R-744) for new vending machines and commercial refrigeration. “We’re trying to get you as many alternatives as we can,” said Witman. The “up-and-coming” refrigerants, she added, are those with low or zero global warming potential (GWP) such ...

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