What is the term for the small amount of refrigerant released when connecting and venting an MGA?

The term for the small amount of refrigerant that is released during the process of connecting and venting a manifold gauge assembly (MGA) is known as a "de minimis release." This term is derived from the Latin phrase meaning "of minimal importance," and in the context of HVAC, it refers to the negligible amount of refrigerant that escapes during the service process. Recognizing this terminology is important for HVAC technicians to ensure compliance with environmental regulations, as it helps in understanding the thresholds that are acceptable for refrigerant release.

In situations involving refrigerant handling, awareness of what constitutes a de minimis release aids in proper training and practices, emphasizing the importance of minimizing refrigerant loss. This knowledge not only reflects good service practices but also aligns with broader environmental stewardship in the HVAC industry.