What is zeotropic refrigerant blend?

A zeotropic refrigerant blend is a mixture of two or more refrigerants that have different boiling points, resulting in a temperature glide during phase changes. This means that as the mixture evaporates or condenses, it does so over a range of temperatures rather than at a single temperature. Zeotropic blends can improve system efficiency and performance by allowing for better heat transfer and reducing the risk of refrigerant fractionation. Common examples include R-407C and R-410A.