The HEB is a thermoelectric circulating bath comprised of a controller and liquid tank. Cooling is performed by a refrigerant-free peltier element, with extracted heat removed via facility water connection. Temperature can be set from -15.0 to 60.0°C (flourinated fluid), achieving a distribution of ±0.2°C in the bath. Abnormal heating and temperature sensor errors can be detected and reported. Overall dimensions and power requirements are suitable for laboratory benchtop service.