Which statement best describes HFCs?

Which statement best describes HFCs?

• A. Naturally occurring refrigerants used in air conditioning.
• B. Gases that deplete the ozone layer.
• C. Man-made gases used as refrigerants.
• D. Inert gases used for inerting systems.

Answer: (C)

HFCs are synthetic refrigerants—man-made chemical compounds used to transfer heat in cooling systems. The statement that best describes them is that they are man-made gases used as refrigerants. They were developed to replace ozone-depleting substances because they do not contain chlorine, so they don’t harm the ozone layer. At the same time, they are potent greenhouse gases with high global warming potential, which is a reason for regulatory attention and ongoing search for lower-GWP alternatives. They are not naturally occurring gases, they do not deplete the ozone layer (unlike CFCs/HCFCs), and they are not inert gases used for inerting systems.

HFCs are synthetic refrigerants—man-made chemical compounds used to transfer heat in cooling systems. The statement that best describes them is that they are man-made gases used as refrigerants. They were developed to replace ozone-depleting substances because they do not contain chlorine, so they don’t harm the ozone layer. At the same time, they are potent greenhouse gases with high global warming potential, which is a reason for regulatory attention and ongoing search for lower-GWP alternatives. They are not naturally occurring gases, they do not deplete the ozone layer (unlike CFCs/HCFCs), and they are not inert gases used for inerting systems.