Last December, the Environmental Protection Agency (EPA) published a proposed rulemaking that outlined its strategy to prohibit the use of high-GWP HFCs in new air conditioning and commercial refrigeration systems. The rulemaking is a component of the AIM Act, which mandates that the EPA reduce the production and usage of HFCs by 85% by 2036. The Act also requires the EPA to increase refrigerant reclamation, minimize leaks, and regulate the use of HFCs in specific sectors or subsectors. This proposed rulemaking focused on the third objective, transitioning to alternatives through sector-based restrictions.