Can refrigerant types be mixed

Mixing different types of refrigerants is not recommended, as it can lead to decreased efficiency, potential damage to the system, and unsafe conditions. Different refrigerants have varying chemical properties and pressures, which can cause issues in the compressor and other components. Additionally, mixed refrigerants can complicate recovery and recycling processes, making it challenging to maintain environmental compliance. It's best to use the specific refrigerant type designated for the system.