The given diagram illustrates the process of a heating system in a house.
Overall, it can be seen that various steps are included in the heating system, like the collection of water, storage, boiling, and distribution of water to taps.
It is evident that the process starts from the flow of cold water into the house, which is collected in the water tank. This water tank is connected to the overflow pipes in the house, and then this water tank delivers the water to radiators with small tubes. In the next step, the stored cold water passes through overflow pipes to hot water radiators.
To continue with the given data, in the next stage, this water passes through all the radiators. Then, in the second-to-last step, a water pump installed near the boiler which pumps the water to oil or gas boiler. In the last stage, warm water is stored in the storage tank, which further overflow warm water to taps in house.
