Which technician correctly stated about A/C systems regarding R-134a by 2011?

In the context of A/C systems and the use of R-134a by 2011, the statement made by Tech A is likely to align with the regulations and guidelines related to refrigerants at that time. By 2011, R-134a had already been widely adopted as a replacement for R-12 in automotive and other refrigeration applications due to its lower ozone depletion potential.

R-134a is significantly less harmful to the ozone layer when compared to its predecessor R-12, which is one of the reasons that its usage became more prevalent as environmental regulations tightened. This aligns with the general understanding and accepted knowledge in the industry regarding refrigerant choices.

Tech A's statement may reflect an awareness of the environmental impacts and regulatory compliance involving refrigerants, emphasizing the importance of using R-134a in A/C systems during that period. Understanding the environmental implications of refrigerant choices is crucial for technicians, as it impacts both current practices and future developments in the industry.

By focusing on R-134a and its acceptance in the market during that timeframe, Tech A demonstrates an alignment with industry standards and environmental best practices, which is instrumental for technicians working with cooling systems.