Hydronics is a technology that uses water to transfer heat for heating and cooling systems. It involves circulating heated or cooled water through pipes to radiators, baseboards, or underfloor systems, providing efficient temperature control in buildings. This method is often used in residential and commercial settings for its energy efficiency and comfort. The key components of a hydronic system include a boiler or water heater, pumps, and piping. Thermostats are used to regulate the temperature, while radiators or fan coils distribute the heat. Hydronic systems can also be integrated with renewable energy sources, such as solar thermal systems, enhancing their sustainability.