HFC Emission Reduction Measures for Mobile Air Conditioning - Regulation for Small Containers of Automotive Refrigerant

Page last reviewed August 30, 2018


In January 2009 the Board approved the mobile air conditioning (MAC) regulation to reduce emissions associated with the use of small containers of automotive refrigerant. Do-it-yourself (DIY) practitioners can purchase HFC-134a refrigerant in small containers holding between 2 ounces and 2 pounds of refrigerant to recharge their MAC system. Typically a traditional container is not fully emptied during the recharging process since the air conditioning system may only require a portion of the container. With a traditionally designed container, any unused refrigerant is almost immediately vented to the atmosphere.

This regulation applies to the sale, use, and disposal of small containers of automotive refrigerant with a Global Warming Potential (GWP) value greater than 150. The regulation achieves emission reductions through implementation of four requirements: 1) use of a self-sealing valve on the container, 2) improved labeling instructions, 3) a deposit and recycling program for small containers, and 4) an education program that emphasizes best practices for vehicle recharging. This regulation went into effect on January 1, 2010, and has been improved through amendments over the years. The latest amendment to the regulation was approved on April 13, 2017.

Final Regulation (as of April 13, 2017) Read the regulation in California Code of Regulations

Certification Procedures for Small Containers of Automotive Refrigerant (as of April 13, 2017)

Annual Reporting Forms (xlsx - 361 KB)

PLEASE NOTICE: The deadline for the annual reporting for manufacturers, distributors, and retailers is March 1, 2018 for calendar year 2017. Please fill out the appropriate forms and return via email attachment to RDDIYReport@arb.ca.gov.

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