For a chiller containing 50 pounds or more of R-123 that is leaking, what is the EPA-required leak rate for repair starting in 2019?

The EPA requires that for chillers containing 50 pounds or more of refrigerant R-123, if the leak rate exceeds 10% of the refrigerant charge in a given year, repairs must be initiated. This standard was set to ensure that equipment owners actively manage refrigerant leaks and minimize emissions of high-global warming potential (GWP) refrigerants such as R-123.

Since R-123 has significant environmental impacts, the relatively high threshold for the leak rate was established to promote responsible handling and maintenance of refrigerant systems. It emphasizes the importance of prompt action to repair leaks, thus reducing overall refrigerant loss and its associated impact on the ozone layer and climate change.

The other percentages provided do not align with the requirements for R-123 as established by the EPA. Knowing and understanding these standards is critical for compliance and environmental stewardship in the HVAC industry.