The UltraCOLD series cascade packages use R404A/R23 refrigerant. They are a comprehensive and ready to install system package including the electrical control panel and control system for easy, trouble free operation. Included is an expansion tank for off-cycle, inter-stage heat exchanger, liquid receiver and other line components as generally required. Available as air cooled or water cooled systems. They can achieve cold room temperatures of -45ºC to -70ºC