The Danfoss compact mixing shunts are used for regulation of flow and supply temperature in hydronic floor heating systems. The compact, flexible design allows mounting the mixing shunt directly to the manifold on both left and right side, with the primary pipe connection from the side or below. A self-acting proportional regulator is used to regulate the supply temperature. The regulator ensures that the desired supply temperature to the underfloor heating system always remains constant. A built-in check valve ensures correct flow direction. An air-vent on top and a thermometer completes the mixing shunt. An optional thermostat protects the floor against too high temperatures.