Which statement best describes R-1234ze used in stationary systems?

Which statement best describes R-1234ze used in stationary systems?

• A. R-1234ze has a GWP around 6 and is non-flammable (A1).
• B. R-1234ze has a GWP around 6 and is mildly flammable (A2L).
• C. R-1234ze has a GWP around 60 and is non-flammable (A1).
• D. R-1234ze has a GWP around 1 and is non-flammable (A1).

Answer: (A)

Lower global warming potential refrigerants and flammability classifications are what this question tests. R-1234ze is a low-GWP refrigerant, with a GWP around 6, meaning it has a much smaller environmental impact over 100 years than traditional HFCs. It is also categorized as non-flammable under standard safety tests (A1), so it doesn’t pose a flammability risk in typical stationary equipment like chillers. This combination—GWP of about 6 and non-flammable—best fits how R-1234ze is described for stationary systems. Descriptions that claim a much higher GWP (around 60), or that it is mildly flammable (A2L), do not align with its standard properties, and stating a GWP near 1 would understate its actual value.

Lower global warming potential refrigerants and flammability classifications are what this question tests. R-1234ze is a low-GWP refrigerant, with a GWP around 6, meaning it has a much smaller environmental impact over 100 years than traditional HFCs. It is also categorized as non-flammable under standard safety tests (A1), so it doesn’t pose a flammability risk in typical stationary equipment like chillers. This combination—GWP of about 6 and non-flammable—best fits how R-1234ze is described for stationary systems. Descriptions that claim a much higher GWP (around 60), or that it is mildly flammable (A2L), do not align with its standard properties, and stating a GWP near 1 would understate its actual value.