EPA approves three hydrocarbon alternatives.
The US Environmental Protection Agency (EPA) has added isobutane (R600a), propane (R290) and the R-441A blend (of ethane, propane, butane and isobutane) as acceptable hydrocarbon alternatives in household and small commercial refrigerators and freezers.
The newly-approved refrigerants can be used to replace ozone-depleting chlorofluorocarbon (CFC)-12 and hydrochlorofluorocarbon (HCFC)-22 in household refrigerators, freezers, combination refrigerator-freezers, and commercial stand-alone units.
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