The U.S. Environmental Protection Agency (EPA) approved hydrofluoroolefin (HFO-1234yf) as an acceptable substitute chemical for chlorofluorocarbon refrigerants. The chemical is intended to replace R-134a since it is believed to have far less global-warming potential. However, “1234yf” may only be used in new motor vehicles. The EPA did not approve use by “do-it-yourselfers” to recharge vehicle air conditioners pending further review on whether there is a toxic chemical exposure risk via inhalation. The agency is also considering a proposal to allow 1234yf to be used as a substitute for R-12 in new motor vehicles.
Questions may be directed to Stuart Gosswein.