A2L

Stay up-to-date with the upcoming A2L transition in 2025.

What are A2L Refrigerants?

A2L refrigerants are considered the second safest class of refrigerants due to its low flammability and low toxicity. They can be a single refrigerant or a blend of multiple refrigerants (in specific amounts).

Beginning 2025, the Environmental Protection Agency (EPA) will set a 750 global warming potential (GWP) limit for air conditioning. To meet the new GWP limit, current refrigerant is phasing out to be replaced by two primary substitutes:

R-454B
R-32

A2L and HVAC

In 2023, the Environmental Protection Agency (EPA) finalized a ruling to address hydrofluorocarbons (HFCs). HFCs, most commonly produced for refrigeration and air-conditioning, are super greenhouse gases that are more potent than carbon dioxide.

January 1, 2025 marks the official transition date to lower GWP refrigerants as stated in the Technology Transition Rule. The EPA will set a 750 global warming potential (GWP) for air conditioning.

How does this affect refrigerant?

All refrigerant cylinders will be moving to gray tanks stamped with the refrigerant number. A2L cylinders will have a red band near the top of the tank, left-handed threads, and a relief valve safety.

How does this affect HVAC equipment?

Refrigerants should never mix. Equipment must be A2L compatible and suitable for flammable refrigerants.

How does this affect the environment?

A2Ls with low global warming potential aims to lower emissions through reduced energy consumption while also increasing system efficiency.

A2L

What are A2L Refrigerants?

A2L and HVAC

A2L Videos

Available Resources

Ruud/Rheem

Chemours

Nu-Calgon