The HRR is a temperature control device mountable in a 19-inch rack. Rack mounting recovers desktop or floor space, permitting stacking of related devices and mobility, depending on the rack style. Recirculating fluid removes heat from the process source, which is then removed from the fluid by an water-cooled refrigeration circuit. Water cooling eliminates the dust filter maintenance and results in a lower cost unit. Coolant temperature stability is ±0.1°C within a set temperature range of 5 to 35°C. Outside of the facility water connection, this device is self-contained with coolant and refrigerant circuits, water cooled heat exchanger, electronic controls, pump, tank and power supply.