Which refrigerant type is noted for very low Global Warming Potential among common options?

Which refrigerant type is noted for very low Global Warming Potential among common options?

• A. HFC
• B. R-410A
• C. CO2
• D. HCFC

Answer: (C)

Global warming potential (GWP) measures how much heat a refrigerant traps in the atmosphere over a set time compared to CO2. CO2 has a GWP of 1, making it the baseline and, among these options, the most climate-friendly in terms of atmospheric warming. The other common refrigerants are much higher. HFCs and HCFCs trap far more heat per unit mass, with values reaching into the hundreds or thousands, so they contribute much more to global warming. A refrigerant like CO2 stands out for its very low GWP, even though it requires different system designs due to its high operating pressure.

Global warming potential (GWP) measures how much heat a refrigerant traps in the atmosphere over a set time compared to CO2. CO2 has a GWP of 1, making it the baseline and, among these options, the most climate-friendly in terms of atmospheric warming.

The other common refrigerants are much higher. HFCs and HCFCs trap far more heat per unit mass, with values reaching into the hundreds or thousands, so they contribute much more to global warming. A refrigerant like CO2 stands out for its very low GWP, even though it requires different system designs due to its high operating pressure.