Which statement about A1 vs A2L safety classifications is true?

Which statement about A1 vs A2L safety classifications is true?

• A. A1 refrigerants are non-flammable; A2L refrigerants are mildly flammable.
• B. A1 refrigerants are mildly flammable; A2L refrigerants are non-flammable.
• C. A1 refrigerants are always low GWP; A2L refrigerants are always high GWP.
• D. A1 refrigerants are toxic; A2L refrigerants are non-toxic.

Answer: (A)

Refrigerant safety classifications are based on flammability. A1 means non-flammable, while A2L indicates mildly flammable. This is why the statement is true: A1 refrigerants do not support flame propagation under typical conditions, whereas A2L refrigerants have a low level of flammability that can require extra safety precautions. Other properties like GWP or toxicity are separate from these flammability ratings and can vary within each class, so you can have a wide range of GWP values and toxicity levels independent of whether a refrigerant is A1 or A2L.

Refrigerant safety classifications are based on flammability. A1 means non-flammable, while A2L indicates mildly flammable. This is why the statement is true: A1 refrigerants do not support flame propagation under typical conditions, whereas A2L refrigerants have a low level of flammability that can require extra safety precautions. Other properties like GWP or toxicity are separate from these flammability ratings and can vary within each class, so you can have a wide range of GWP values and toxicity levels independent of whether a refrigerant is A1 or A2L.