A hydronic heating system consists of five components:
- The boiler heats water to a thermostatically controlled temperature. Boilers can use natural gas, LPG, off-peak electricity, or can be wood fired.
- The piping, usually made of copper/plastic or multilayer and carries the heated water from the boiler to the radiators/ convectors, and back again for reheating.
- A pump circulates the water through the piping.
- Radiators or convectors transfer the heat into the room (several types of radiators and convectors are available).
- Programmable wall thermostats ideally control the heat levels (or room temperature) to optimise comfort throughout the house.