The Helios Fans WHSH HE 24 V is a temperature regulation system designed for use with hot water heater batteries, in combination with a room or duct sensor. It includes all necessary components for precise and efficient control of heating output: a flow and return water temperature display, a 24 V servo motor, a mixing valve, a check valve, thermal insulation jacket, and flexible connection hoses. This compact and reliable unit enables effective temperature management in ventilation and heating systems