Update on HFC Regulations in the United States

The American Innovation and Manufacturing (AIM) Act, enacted in 2020, is the U.S. law designed to phase down hydrofluorocarbon (HFCs) production and consumption. The Environmental Protection Agency (EPA) is responsible for its implementation and enforcement.

List of the final rules published by EPA, in chronological order:

List of the final rules published by EPA
Date	Title	Short summary and links
10/05/2021	Phasedown of Hydrofluorocarbons: Establishing the Allowance Allocation and Trading Program Under the American Innovation and Manufacturing Act	Regulations implementing the AIM Act HFC phasedown by 85% by 2036, establishing allowance allocation, transfers, and compliance provisions. [More information]
07/12/2023	Phasedown of Hydrofluorocarbons: Adjustment to the Hydrofluorocarbon Production Baseline	Correction of HFC production baseline calculations for phasedown under the AIM Act. [More information]
07/20/2023	Phasedown of Hydrofluorocarbons: Allowance Allocation Methodology for 2024 and Later Years	Amendment of HFC allocation regulations for 2024–2028, updating the consumption baseline, refining allowance expenditure rules, and revising reporting requirements. [More information]
10/24/2023	Phasedown of Hydrofluorocarbons: Restrictions on the Use of Certain Hydrofluorocarbons Under the American Innovation and Manufacturing Act of 2020	Restriction of HFC use in specific sectors under the AIM Act, with compliance dates at least one year after promulgation. [More information]
09/11/2024	Phasedown of Hydrofluorocarbons: Vacated Provisions	Removal of vacated regulations on disposable cylinders and HFC cylinder tracking. [More information]
10/11/2024	Phasedown of Hydrofluorocarbons: Management of Certain Hydrofluorocarbons and Substitutes	Emissions reduction and reclamation program for HFC management, including leak detection, reclaimed and recycled HFC use, technician training, cylinder disposal, and alternative waste standards for spent refrigerants. [More information]
12/12/2024	Phasedown of Hydrofluorocarbons: Restrictions on the Use of HFCs Under the AIM Act in Variable Refrigerant Flow Air Conditioning Subsector	Amendment of the 2023 Technology Transitions regulations, extending installation deadlines for certain variable refrigerant flow systems until January 1, 2027, or January 1, 2028 with pre-approved building permits, if components were made or imported before January 1, 2026. [More information]

For official guidelines, compliance requirements, and regulatory updates, visit the EPA’s website.