What type of heating system is described by the term 'hydronic'?

A hydronic heating system utilizes water as its heat transfer medium. In this type of system, water is heated in a boiler and then circulated through pipes to radiators or underfloor heating elements, where it releases heat into the living spaces. This makes it a highly efficient method for warming a home, as water can retain and transfer heat effectively.

Hydronic systems can be beneficial for maintaining a consistent and comfortable temperature, offering even heat distribution throughout the areas being heated. They are often quieter than forced air systems and can provide a more comfortable indoor environment. By using water, hydronic heating can also be more energy-efficient compared to some other heating methods.

While other types of heating systems may be related to the options provided, those systems do not operate predominantly on the principle of using water as the main heating medium.