A refrigeration system, comprising: a compressor (20, 620); a condenser (12, 612); an expansion device (14, 614); an evaporator (16, 616); the compressor (20, 620), the condenser (12, 612), the expansion device (14, 614), and the evaporator (16, 616) are fluidly connected to form a refrigeration circuit; and a purge (20, 620) fluidly connected to the condenser (12, 612) to receive a chiller refrigerant flowing through the refrigeration system from the condenser (12, 612), the purge (20, 620) configured to remove non-condensable gases from the chiller refrigerant, and the chiller refrigerant including an environmentally-suitable chiller refrigerant that has a 100 year direct global warming potential of less than 150, wherein the environmentally-suitable chiller refrigerant has a composition comprising: at least one chemical of 1-chloro-3,3,3 trifluoropropene, 1-chloro-3,3,3 trifluoropropene, 2-chloro-3,3,3 trifluoropropene, 1,1,dichloro-3,3,3 trifluoropropene, 1,3,3,3 tetrafluoropropene, 1,3,3,3 tetrafluoropropene, 1,2 dichloro-3,3,3 trifluoropropene, 1,2 dichloro-3,3,3 trifluoropropene, 1,1,3 trichloro-3,3,3 trifluoropropene, 1,2 dichloroethylene, 1,2 dichloroethylene, 1,1 dichloroethylene, 1,1,1,4,4,4 hexafluorobutene, 1,1,1,4,4,4 hexafluorobutene, Isopentane, and Pentane, and wherein the amount of the chemical in the environmentally-suitable chiller refrigerant is in a range of about 40% to about 100% by weight. a compressor (20, 620); a condenser (12, 612); an expansion device (14, 614); an evaporator (16, 616); the compressor (20, 620), the condenser (12, 612), the expansion device (14, 614), and the evaporator (16, 616) are fluidly connected to form a refrigeration circuit; and a purge (20, 620) fluidly connected to the condenser (12, 612) to receive a chiller refrigerant flowing through the refrigeration system from the condenser (12, 612), the purge (20, 620) configured to remove non-condensable gases from the chiller refrigerant, and the chiller refrigerant including an environmentally-suitable chiller refrigerant that has a 100 year direct global warming potential of less than 150, wherein the environmentally-suitable chiller refrigerant has a composition comprising: at least one chemical of 1-chloro-3,3,3 trifluoropropene, 1-chloro-3,3,3 trifluoropropene, 2-chloro-3,3,3 trifluoropropene, 1,1,dichloro-3,3,3 trifluoropropene, 1,3,3,3 tetrafluoropropene, 1,3,3,3 tetrafluoropropene, 1,2 dichloro-3,3,3 trifluoropropene, 1,2 dichloro-3,3,3 trifluoropropene, 1,1,3 trichloro-3,3,3 trifluoropropene, 1,2 dichloroethylene, 1,2 dichloroethylene, 1,1 dichloroethylene, 1,1,1,4,4,4 hexafluorobutene, 1,1,1,4,4,4 hexafluorobutene, Isopentane, and Pentane, and wherein the amount of the chemical in the environmentally-suitable chiller refrigerant is in a range of about 40% to about 100% by weight. at least one chemical of 1-chloro-3,3,3 trifluoropropene, 1-chloro-3,3,3 trifluoropropene, 2-chloro-3,3,3 trifluoropropene, 1,1,dichloro-3,3,3 trifluoropropene, 1,3,3,3 tetrafluoropropene, 1,3,3,3 tetrafluoropropene, 1,2 dichloro-3,3,3 trifluoropropene, 1,2 dichloro-3,3,3 trifluoropropene, 1,1,3 trichloro-3,3,3 trifluoropropene, 1,2 dichloroethylene, 1,2 dichloroethylene, 1,1 dichloroethylene, 1,1,1,4,4,4 hexafluorobutene, 1,1,1,4,4,4 hexafluorobutene, Isopentane, and Pentane, and wherein the amount of the chemical in the environmentally-suitable chiller refrigerant is in a range of about 40% to about 100% by weight.