In 2020, as part of a global agreement to reduce greenhouse gasses, the American Innovation and Manufacturing (AIM) Act gave the US Environmental Protection Agency (EPA) authority to regulate hydrofluorocarbons (HFCs) and begin the phase down of refrigerants with high HFCs by 2036.

At that time, the current HVAC industry refrigerant, R-410A, was deemed a contributor to global warming and the EPA mandated that manufacturers switch to a refrigerant with a Global Warming Potential (GWP) of 700 or less by January 1, 2025.