R1234ze

R1234ze (Solstice® ze) is a very low GWP, sustainable alternative to traditional refrigerants for energy-efficient chillers and/or commercial air conditioning in supermarkets and commercial buildings, as well as in other medium-temperature applications like heat pumps, refrigerators and vending machines.

R1234ze is classified A2L so is mildly flammable and not suitable for retrofits.