The nano VDR Variable Speed Refrigerated Compressed Air Dryers provide maximum efficiency and performance when it comes to drying compressed air. Operating with a refrigerant circuit and heat exchangers, they can cool the compressed air to as low as +37.4°F/3°C in order to condense moisture so that your compressed air is dry and consumes no compressed air in the process. Better than direct expansion dryers which run continuously at full speed, nano VDR Variable Speed Refrigeration Compressors only run at the speed required to dry your process air to its dew point setpoint, saving energy while providing excellent performance.