Abstract: A refrigerant composition includes R-125 (pentafluoroethane), R-134a (1,1,1,2-tetrafluoroethane), R-32 (difluoromethane), R-227ea (1,1,1,2,3,3,3-heptafluoropropane), R-152a (1,1-difluoroethane), CO2 and R-1234ze (1,3,3,3-tetrafluoropropene). In one exemplary embodiment, the refrigerant includes 18.5-20.5 wt % R-125, about 9-11 wt % R-134a, about 20-22 wt % R-32, about 3-5 wt % R-227ea, about 2.5-4.5 wt % R-152a, about 1-3 wt % CO2 and about 39-41 wt % R-1234ze. Formulating with reclaimed material lowers the global warming potential to about 400 to about 750.

Abstract: A refrigerant composition includes R-125 (pentafluoroethane), R-134a (1,1,1,2-tetrafluoroethane), R-32 (difluoromethane), R-227ea (1,1,1,2,3,3,3-heptafluoropropane), R-152a (1,1-difluoroethane), CO2 and 1234ze (1,3,3,3-tetrafluoropropene). In one exemplary embodiment, the refrigerant includes about 14-16 wt % R-125, about 14-16 wt % R-134a, about 25-27 wt % R-32, about 3-5 wt % R-227ea, about 2-4 wt % R-152a, about 6-8 wt % CO2 and about 29-31 wt % 1234ze. In another embodiment, the refrigerant composition includes about 15 wt % R-125, about 15 wt % R-134a, about 26 wt % R-32, about 4 wt % R-227ea, about 3 wt % R-152a, about 5 wt % CO2 and about 30 wt % 1234ze. Optionally, R-152a can be replaced with dimethyl ether. Formulating with reclaimed material lowers the global warming potential to about 400-750.