Your boiler (or tankless water heater) might produce water at a higher temperature than what you want flowing to your faucets and fixtures. If this is the case, you will need to install a mixing valve. A mixing valve will take your hot water on one end and take cold water in on another end. A dial is set to the temperature you desire, and the valve will mix the hot with the cold to produce water of that temperature.
Tekmar Mixing Valves, Taco Mixing Valves, and other mixing valves can be found at www.supplyhouse.com
Tekmar Mixing Valves, Taco Mixing Valves, and other mixing valves can be found at www.supplyhouse.com