Which refrigerant has the lowest global warming potential (GWP) among those mentioned?

Which refrigerant has the lowest global warming potential (GWP) among those mentioned?

• A. R-290
• B. R-22
• C. R-134a
• D. R-410A

Answer: (A)

Global warming potential (GWP) measures how much heat a greenhouse gas traps in the atmosphere over a set period, relative to carbon dioxide. Among these refrigerants, R-290 has a very low GWP—about 3—much lower than the others listed. The GWP figures for the rest are roughly 1,810 for R-22, 1,430 for R-134a, and 2,100 for R-410A, so R-290 is the lowest. Keep in mind, though, that R-290 is flammable, which affects how and where it can be used.

Global warming potential (GWP) measures how much heat a greenhouse gas traps in the atmosphere over a set period, relative to carbon dioxide. Among these refrigerants, R-290 has a very low GWP—about 3—much lower than the others listed. The GWP figures for the rest are roughly 1,810 for R-22, 1,430 for R-134a, and 2,100 for R-410A, so R-290 is the lowest. Keep in mind, though, that R-290 is flammable, which affects how and where it can be used.