What do you call refrigerants that have a low impact on ozone yet are flammable?

• A. Class A1
• B. A2L
• C. A3
• D. Non-flammable

Answer: (B)

Refrigerants that have a low impact on the ozone layer but are flammable are classified as A2L. This designation is part of the safety classification system established to identify the properties of various refrigerants. A2L refrigerants are considered mildly flammable, meaning they can ignite under specific conditions, but they require higher concentrations along with an ignition source to pose a risk.

The classification is part of a broader initiative to phase out more harmful substances while transitioning to alternatives that are more environmentally friendly, specifically targeting low ozone depletion potential (ODP) and low global warming potential (GWP). Understanding these classifications is essential for technicians to select appropriate refrigerants that align with safety protocols and environmental regulations.

In contrast, the other classifications such as Class A1 indicate non-flammable refrigerants, whereas A3 represents highly flammable substances. Therefore, A2L specifically describes the combination of low ozone impact with mild flammability, highlighting its unique standing among refrigerant types.