Environmental Protection Agency (EPA) MVAC Certification 2025 – 400 Free Practice Questions to Pass the Exam

The decision regarding R-134a by the EPA centers on its phasing down due to its high global warming potential (GWP). R-134a has been recognized for its significant contribution to climate change when released into the atmosphere. The GWP measures how much heat a greenhouse gas traps in the atmosphere over a specific time period, typically 100 years, compared to carbon dioxide. As awareness of the impacts of refrigerants on global warming has increased, the EPA has initiated actions to phase down substances like R-134a in favor of alternatives that are more environmentally friendly and have a lower GWP.

The broader context includes an emerging focus on promoting substances that contribute less to climate change, including natural refrigerants and other lower GWP synthetic options. However, R-134a is not simply being replaced by natural refrigerants, nor is it being perpetually endorsed as a superior choice—rather, the emphasis is on reducing its use in line with environmental policy goals. Therefore, the phaseout strategy is aligned with an overarching commitment to mitigate climate change impacts stemming from refrigerant emissions.