ELI5: Explain Like I'm 5

Hydronics

Hydronics has to do with using water to transfer or store heat. For example, people often use water to transfer heat from a boiler or furnace to warm up a house. Hydronics systems can also be used for cooling too. The water can pass through a device called a heat exchanger, which transfers heat from one area to another. Generally, outlets like radiators or heat ducts are used to spread the heat around the house.