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

Question: 1 / 400

Which type of refrigerant is generally considered more environmentally friendly?

HCFCs

CFCs

HFOs (Hydrofluoroolefins)

HFOs, or Hydrofluoroolefins, are recognized as more environmentally friendly refrigerants primarily due to their lower global warming potential (GWP) and their ability to break down more quickly in the atmosphere compared to other refrigerants. While HCFCs and CFCs are known for their ozone-depleting properties and high GWPs, HFOs do not contribute to ozone layer depletion, making them a preferred choice in an era where environmental impact is a critical concern.

HFCs, though commonly used as replacements for CFCs and HCFCs due to not being ozone-depleting, still carry a significant GWP, which is a concern for climate change. In contrast, HFOs offer a way to mitigate environmental harm while maintaining efficient thermodynamic performance in cooling systems. This makes HFOs the modern solution for refrigerants as the industry shifts towards more sustainable practices.

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