The Helios Fans WHSH HE 24 V (0 – 10 V) is a temperature regulation system designed to control supply air temperature through precise water flow adjustment to a hot water heater battery. The system includes a control unit with integrated pump, flexible connection hoses, and a 3‑way mixing valve. Operated via a 24 V control voltage with a 0 – 10 V modulation signal, this unit enables accurate temperature control in ventilation systems, ensuring consistent air quality and thermal comfort.