AHRI Low-GWP Alternative Refrigerants Evaluation Program

In response to environmental concerns raised by the use of high global warming potential (GWP) refrigerants, the Air-Conditioning, Heating, and Refrigeration Institute (AHRI) is launching an industry-wide cooperative research program to identify and evaluate promising alternative refrigerants for major product categories.

These include air conditioners, heat pumps, dehumidifiers, chillers, water heaters, ice makers, and refrigeration equipment. The program, referred to as the Low GWP Alternative Refrigerants Evaluation Program, or low GWP AREP, is strongly desired by the industry to assess the research needs, accelerate industry's response to environmental challenges raised by the use of high GWP refrigerants, and avoid duplicative work.


AHRI hosted the Low-GWP AREP Conference on January 16, 2014, in New York City. Experts from sixteen test entities presented their test results from Phase I testing of the program. The conference presentation slides are available here:

>AHRI Low-GWP AREP Conference

Final test reports issued to date

Literature Review

The program consists of compressor calorimeter testing, system drop-in testing, soft-optimized system testing, and heat transfer testing. All tests other than heat transfer coefficient measurements are expected to be performed at participating companies' laboratories, using their own resources, at their own expense. The Low GWP AREP program will be managed by a technical committee reporting to the AHRI Executive Committee. The AHRI Research Department administers the Low-GWP AREP program, coordinates and disseminates information and reports among the participating companies and the observers. Representatives of interested organizations should contact AHRI's Research Department for further information. Questions should be directed to: Mr. Karim Amrane, Vice President, Regulatory and Research Mr. Xudong Wang, Manager of Research To access the Low-GWP AREP Technical Committee meeting minutes, available only to AHRI members, please go to the Research area of the Resources section on the AHRI Members Only website.