R-407a

A blend of R-32, R-125, and R-134a that has very similar properties to R-22 in low and medium temperature refrigeration applications. R-407A has the closest property match to R-22 in a low temperature retrofit project compared to other blends on the market; however, there is a 10°F temperature glide. Most new supermarket and refrigeration equipment has been built for an HFC such as R-404A, R-507, or R-407A. New systems built with R-407A must have POE lubricants, and retrofitted R-22 systems would need the residual oil changed to POE.