Can service technicians safely use formulas and tables to mix their own azeotropic refrigerant blends?

Using formulas and tables to mix azeotropic refrigerant blends is not considered safe or appropriate because azeotropic mixtures have specific proportions that must be adhered to in order to maintain their properties. Azeotropes behave as single substances with consistent boiling points and other physical characteristics, which can be altered if the mixture is not precisely measured. This precision is critical for the proper function, efficiency, and safety of the refrigeration systems in which they are used.

Additionally, blending refrigerants can lead to non-compliance with environmental regulations and safety standards. Improperly mixed refrigerants can create a range of issues, including unstable mixtures that may not function correctly or safely in a system. As such, the industry standards and regulations often require that refrigerants, especially azeotropes, be purchased in pre-mixed, certified containers rather than being mixed on-site by technicians.