Protection of Stratospheric Ozone: New Substitute in the Motor Vehicle Air Conditioning Sector Under the Significant New Alternatives Policy (SNAP) Program

摘要

The Clean Air Act requires the Environmental Protection Agency (EPA) to review alternatives for ozone-depleting substances and to approve of substitutes that do not present a risk more significant than other alternatives that are available. Under that authority, the Significant New Alternatives Policy (SNAP) program of EPA proposes to expand the list of acceptable substitutes for ozone-depleting substances (ODS). The substitute addressed in this proposal is for the motor vehicle air conditioning (MVAC) end-use within the refrigeration and air-conditioning sector. EPA proposes to find HFO-1234yf acceptable, subject to use conditions as a substitute for CFC-12 in motor vehicle air conditioning. The proposed substitute is a non ozone- depleting gas and consequently does not contribute to stratospheric ozone depletion.