Which refrigerants are typically considered low-flammability?

Group A1 refrigerants are classified as being non-flammable and have a low toxicity level. This classification indicates that these refrigerants pose minimal risks in terms of flammability, making them suitable for a wide range of applications in refrigeration systems where safety is a critical concern. Examples of Group A1 refrigerants include commonly used substances like R-134a and R-410A, which are widely adopted for their environmental stability and safety profile.

In contrast, the other groups have varying degrees of flammability. Group A2 refrigerants, for instance, are considered mildly flammable, and while they can be used safely in the right conditions, they require additional precautions due to their flammability potential. Group A3 refrigerants are highly flammable, which significantly limits their applications and necessitates stringent safety measures. Group B refrigerants fall under a classification that can include various flammability ratings, making it a less specific category compared to the established hierarchy of Groups A1, A2, and A3. Therefore, Group A1 refrigerants are the optimal choice for applications where low-flammability is essential.