The type of refrigerant used can affect the evacuation and dehydration process, as different refrigerants have different properties and requirements. For example, systems using refrigerants with higher moisture tolerance, such as R-410A, may require less stringent evacuation and dehydration procedures compared to systems using refrigerants with lower moisture tolerance, such as R-22. Additionally, some refrigerants may require specialized equipment or procedures for evacuation and dehydration.