Named for their ASHRAE safety classification, A2L refrigerants are characterized by mild flammability, low toxicity, and low global warming potential (GWP). They include hydrofluoroolefins (HFOs) and HFO blends. A2L refrigerants offer similar operating characteristics to legacy refrigerants, a safer profile than ammonia and hydrocarbon refrigerants, and are more energy efficient than R-410A and transcritical CO₂ systems.
Though mildly flammable, A2Ls are safe when handled properly. Like all refrigerants, specific codes and standards apply.
R32 and R1234YF are just 2 examples of A2L refrigerants.