Series HEC is a range of Peltier type chillers which are ideal for ensuring the constant temperature of circulating fluids. The series is available in either an air cooled (refrigerant free type), or a water cooled?version. Available in a wide range of power supply voltages, the HEC offers outstanding cooling capacity performance of between 230 and 1200W depending on the selected model. Further benefits of the HEC?s Peltier device is that both noise and vibrations are kept to an absolute minimum.