Which of the following is an example of a high-GWP refrigerant?

High-GWP (Global Warming Potential) refrigerants are substances that have a significant impact on climate change due to their strong greenhouse gas properties. R-404A is recognized as a high-GWP refrigerant due to its substantial contribution to global warming. It has a GWP value of around 3922, which means it is significantly more potent as a greenhouse gas compared to carbon dioxide over a 100-year period.

On the other hand, when considering the other refrigerants:

• R-134A also has a high GWP but is typically considered less impactful than R-404A.

• R-290 is propane, a natural refrigerant with a low GWP, making it environmentally friendly.

• R-744 is carbon dioxide, which has a very low GWP and is often used as a low-impact refrigerant alternative.

Therefore, R-404A's very high GWP categorizes it clearly as a high-GWP refrigerant, affirming its status compared to other options listed.