The U.S. Environmental Protection Agency (EPA) has issued final approval for a new refrigerant for use in motor vehicle air conditioning systems that does not deplete the ozone layer, which helps protect the environment and people’s health. The new chemical, HFO-1234yf, may now be used in air conditioning for new cars and light trucks. When used appropriately, this chemical can reduce the environmental impact of motor vehicle air conditioners and has a global warming potential that is 99.7 percent less than the current chemical (HFC–134a) used in most car air conditioners.
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This document is a prepublication version, signed by EPA Administrator Lisa P. Jackson on February 24, 2011. EPA have taken steps to ensure the accuracy of this version, but it is not the official version.1
The EPA Administrator, Lisa P. Jackson, signed the following final rule on February 24, 2011, and EPA is submitting it for publication in the Federal Register (FR). While EPA has taken steps to ensure the accuracy of this Internet version of the rule, it is not the official version of the rule for purposes of compliance. Please refer to the official version in a forthcoming FR publication, which will appear on the Government Printing Office’s FDSys website (http://fdsys.gpo.gov/fdsys/search/home.action) and on Regulations.gov (http://www.regulations.gov) in Docket No. EPA-HQ-OAR-2008-0664. Once the official version of this document is published in the FR, this version will be removed from the Internet and replaced with a link to the official version. (U.S. EPA)