New Refrigerant 2025 Flammable Gas. The environmental protection agency (epa) introduced a2l federal mandates in 2023 that require manufacturers to use flammable refrigerants such as a2l (or a3) by january 2025. A refrigerant with a gwp of 1,000 would be about a thousand times per pound a more potent greenhouse gas than carbon dioxide.
Here’s what hvac professionals need to know. In december 2022, the epa unveiled a refrigerant ban that will go into effect between 2025 and 2026 (depending on the industry).