On October 13, 2009 EPA Administrator Jackson signed a rule that proposes to amend 40 CFR Part 82 by adding HFO-1234yf to the list of refrigerants that are acceptable as substitutes for CFC-12 in motor vehicle air conditioning. Several use conditions are proposed to address flammability concerns. Comments on the proposal will be due 75 days following publication of the proposal in the Federal Register.
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