I-MAC aims at cost-effective reductions in greenhouse gas emissions, by reducing direct system refrigerant leakage by 50%; improving system efficiency by 30%; reducing system loads by 30%; and reducing service refrigerant losses by 50%.

Enhanced HFC-134a systems are confirmed to remain competitive with any alternative and responsible use programs can preserve their viability in the marketplace, as shown by present achievements:

  • Standard (SAE J-2727) to certify low-leakage mobile air conditioning systems has been developed. The EU Commission agreed later on to use standard J-2727 in the frame of its MAC Directive 2006/40)
  • Technologies to improve MAC efficiency by up to 50 percent, i.e. 20 percent more than the initial goal, have been identified
  • New technician certification program has been developed to improve technicians' skills and refrigerant recovery rates
  • Standard (SAE J-2788) on Refrigerant recovery and recycling equipment has been updated to improve the refrigerant recovery during maintenance or dismantling
  • Cooperative research projects have been started in Australia, India, and Mexico.

These achievements were confirmed at the Phoenix (Arizona, USA) SAE Workshop in  June 2006, where I-MAC Chairman confirmed I-MAC is on track to meet its research goals by the end of 2006 :

  • Solid test data have been gathered and test procedures established, in an area were data and evaluation procedures were both very spotty.
  • New vehicle leak performance is better than expected and significantly below the limit of 40 to 60 fixed by the future EU Directive (article 5 § 3).
  • Servicing MAC and refrigerant recycling are critical for refrigerant containment, and are being addressed to achieve real world emission reductions.

Source :
http://www.epa.gov/cppd/mac/