Which refrigerant group indicates a low level of flammability?

The refrigerant group that indicates a low level of flammability is A1. This classification system is used to categorize refrigerants based on their flammability and toxicity characteristics.

Refrigerants classified in group A1 are considered non-flammable and have a low toxicity risk. This means that in normal use and under typical operating conditions, they do not pose a significant fire hazard, making them safer for use in various refrigeration and air conditioning applications.

In contrast, other groups like A2L, B2, and C1 denote varying degrees of flammability or toxicity. For instance, A2L refrigerants are mildly flammable, while groups such as B2 contain refrigerants that have a higher flammability or toxicity risk. Understanding these classifications is crucial for the safe handling and application of refrigerants in the field, ensuring compliance with safety regulations and minimizing hazards in operating environments.