The diagrams illustrate the process of how a central heating system provides both hot water and warm air for a house. Overall, the system operates by heating water in a boiler, which is then circulated through pipes for domestic use, while warm air is distributed through ducts to different rooms.
First of all, the process begins when cold water enters the boiler, which is powered by either gas or oil. Inside the boiler, the water is heated and then pumped into a radiator system. This heated water flows through pipes to provide hot water for household purposes such as bathing or cleaning.
At the same time, the system also delivers warm air to heat the house. Once the water is heated, it passes through a heat exchanger. Here, the heat is transferred to air, which is then pushed by an electric fan into air ducts. These ducts are connected to various rooms in the house, ensuring an even distribution of warm air throughout the living space. Finally, cool air is drawn back through a vent and re-heated, creating a continuous cycle.
In summary, the central heating system functions through two main outputs: supplying hot water for domestic use and circulating warm air for heating, both of which originate from the boiler and are distributed via different channels.