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. Starting in 2025, the epa will require all.
Are the 2025 new refrigerants mildly flammable? The most common low gwp alternatives are classified by ashrae as mildly flammable, or a2l.