A hydronic system is a type of heating and cooling system that uses water or a water/glycol mixture to transfer heat throughout a building.

( A glycol mixture is most likely used to prevent freezing, as it lowers the freezing point of the water)

The water is heated by a boiler or heat pump and circulated through a series of pipes and radiators or baseboard heaters.

In a hydronic system, the water is pumped through a series of pipes to radiators or other heat exchangers located throughout the building. As the water passes through the heat exchangers, it absorbs heat from the surrounding air and warms the space. When the water returns to the boiler, it is reheated and circulated back through the system to continue the heating process.

Hydronic systems are highly efficient and can be used for both heating and cooling. They are often used in residential and commercial buildings where there is a need for precise temperature control, such as hospitals and schools. They are also popular in buildings with radiant floor heating systems.