Heating Quickly and directly find documentation on system components for heating circuits, solid fuel boiler groups and flat stations Tuxhorn » Products » Heating Heating circuit >>> Compact pump groups for mixed and unmixed heating circuits with large kvs values for high heating capacities Product portfolio Heating circuit Boiler circuit >>> Boiler circuit groups with therm. and elect. mixing valves for return temp. maintenance of solid fuel boilers Flat station >>> Thermally controlled flat stations with extensive basic equipment for unmixed and mixed heating circuits