Hydronic heating is a system that uses water to transfer heat throughout a building. It typically involves a boiler that heats water, which is then circulated through pipes to radiators or underfloor heating systems. This method provides consistent warmth and can be more energy-efficient than traditional heating systems. The heated water in a hydronic heating system can also be used for domestic hot water needs. By integrating with solar panels or heat pumps, these systems can further enhance energy efficiency and reduce utility costs, making them an environmentally friendly option for heating spaces.