"This recommended best practice outlines a method for estimating CO2-Equivalent emissions using the GREEN-MAC-LCCP? (Global Refrigerants Energy and ENvironmental ?C Mobile Air Conditioning ?C Life Cycle Climate Performance) model (also referred to as ""the model"" in this standard)."
SAE J2766-2019 history
2019SAE J2766-2019 Life Cycle Analysis to Estimate the CO2-Equivalent Emissions from MAC Operation
2009SAE J2766-2009 Life Cycle Analysis to Estimate the CO<(Index)2>-Equivalent Emissions from MAC Operation