What aspect of R-407C makes it a preferable choice compared to other refrigerants?

R-407C is often chosen as a replacement for R-22 because its pressure and temperature profiles closely mimic those of R-22. This similarity enables it to be used in existing R-22 systems with minimal modifications, allowing for a smoother transition from R-22 to R-407C without necessitating significant redesigns of the equipment.

This compatibility means that technicians can use the same equipment and tools with R-407C that they would typically use with R-22, making the switch easier and less costly. The thermodynamic properties make it viable for a range of applications similar to those for R-22, ensuring that performance standards are met without the need for extensive retraining or system modifications.

Other aspects, such as the natural refrigerant status or the extent of its synthesis, do not directly contribute to its preference in applications originally designed for R-22.