2025 Phase-Out: Starting January 1, 2025, the manufacturing of new HVAC systems using R-410A will be prohibited in the United States. This is due to EPA regulations under the American Innovation and Manufacturing (AIM) Act. The goal is to transition to refrigerants with lower global warming potential (GWP). Key Changes: Manufacturers will shift to producing systems that use alternative refrigerants, such as R-454B. While the manufacture of new R-410A systems will stop, there are some allowances for already manufactured systems. There is a one year sell through period for field assembled systems. Impact: This change will affect the HVAC industry and homeowners, as older R-410A systems will eventually need to be replaced. The production of R-410A for recharging existing systems will also decrease over time. In essence, while existing R-410A systems won’t be immediately unusable, the production of new systems using it will be prohibited in 2025.