New Refrigerant 2025 Flammable Liquids. By 2025, all new refrigeration systems must use flammable refrigerants. The hvac industry has officially entered a new chapter with the new refrigerant 2025 changes now in effect.

These changes will focus on ensuring. A2l refrigerants are mildly flammable, which is why manufacturers are required to add new safety features to hvac systems.