Are R407A and R407C the Same? No. R407A and R407C are related HFC refrigerant blends, but they are not the same refrigerant and should not be treated as interchangeable. Both are made from R32, R125, and R134A, yet the percentages are different. That change in blend ratio affects their pressure-temperature...

In some U.S. end uses, R134A has been listed by EPA as an acceptable substitute for R22, including retrofit residential and light-commercial air-conditioning equipment. That does not mean an R22 system can simply be emptied and refilled with R134A. EPA is explicit that there are no true drop-in replacements for...

What Is the Composition of R-407A? R407A is a three-component zeotropic HFC refrigerant blend made from R32, R125, and R134A. Its nominal composition by mass is 20% R32, 40% R125, and 40% R134A. Arkema and Chemours both publish this formulation in their technical documentation for R407A. That exact ratio matters....