What is the new maximum allowable annual leak rate for a comfort cooling system containing 50lbs or more of R-410A starting in 2019?

• A. 15%
• B. 20%
• C. 10%
• D. 5%

Answer: (C)

The correct answer identifies the new maximum allowable annual leak rate of 10% for a comfort cooling system containing 50 pounds or more of R-410A that was established starting in 2019. This regulation aims to promote better leak detection and prevention practices, thereby reducing the release of refrigerants into the atmosphere.

R-410A is a hydrofluorocarbon (HFC) refrigerant, which is subject to strict environmental regulations due to its global warming potential. The decrease in allowable leak rate indicates a move towards more aggressive standards to further protect the environment. Systems exceeding this leak rate are required to take corrective actions, such as repairing leaks and ensuring compliance with mandatory reporting.

Maintaining a tight regulation of refrigerant leaks is critical in managing the overall lifecycle of refrigerants and mitigating their impact on climate change. This standard encourages technicians and companies to prioritize effective maintenance practices and encourages investments in technology that helps detect and repair leaks promptly.