What type of refrigerant is commonly used in Thermo King units?

The use of R-404A and R-134a as refrigerants in Thermo King units is prevalent due to their effectiveness in transport refrigeration applications. R-404A is a hydrofluorocarbon (HFC) blend that is widely utilized in refrigerated transport because of its low pressure and high cooling capacity, making it suitable for the stringent temperature control required in logistics. R-134a is also commonly used, particularly in smaller applications or older models, due to its efficiency and effective thermodynamic properties.

Both of these refrigerants are less harmful to the ozone layer compared to CFCs, which is essential given the ongoing global efforts to reduce ozone-depleting substances. This consideration is crucial in the selection of refrigerants for modern refrigeration units and aligns with regulatory standards aimed at minimizing environmental impact.

In contrast, while options such as R-22, R-410A, R-500, R-507, and ammonia-based refrigerants have their own specific applications, they are not the common choices for Thermo King systems. R-22, for example, has been phased out for many applications due to its ozone-depleting properties, and R-410A is primarily used in air conditioning systems rather than transport refrigeration. Similarly