Which of the following F-Gases is not typically used in refrigeration?

The correct answer is CO2, as it is not typically classified as an F-gas. F-gases include hydrofluorocarbons (HFCs) and perfluorocarbons (PFCs), which are used in various applications, including refrigeration.

While CO2 is often used in refrigeration systems, particularly in commercial applications due to its natural refrigerant properties and lower global warming potential, it does not fall under the category of synthetic F-gases that are regulated under certain environmental protocols. On the other hand, both HFCs and PFCs are man-made gases commonly utilized in refrigeration systems for their efficient heat transfer properties.

SF6 is primarily used in the electrical industry as an insulating gas rather than in refrigeration applications, reinforcing why CO2 would be seen as outside the usual classifications of gases associated directly with refrigeration.