What is the role of a mixing valve in a hydronic system?

The role of a mixing valve in a hydronic system is to blend hot and cold water to achieve a desired temperature for the system's output. By adjusting the ratio of hot water coming in from the boiler and cold water returning from the system, the mixing valve ensures that the water supplied to heating elements, such as radiators or underfloor heating, is at a safe and comfortable temperature. This blending action helps maintain system efficiency and prevents overheating in certain areas, ensuring consistent heating throughout a space.

In hydronic systems, maintaining the correct water temperature is crucial for comfort and energy efficiency, and the mixing valve plays a key role in this process by allowing for precise control over the temperature of the water being circulated.