Diagram : central heating system

The diagram below shows how a central heating system in a house works.
Summarise the information by selecting and reporting the main features, and make comparisons where relevant.

The diagram shows the operation and structure of a central heating system in households.

In general, the system contains several pieces of equipment well-connected with each other through the support of wires.

On the top of the house contains a pipe through which cold water gets in. Besides, an overflow pipe is used to connect a water tank to fill storage tank with a storage tank. As can be seen, part of the storage tank wire is attached to hot water to taps while another part is linked to a device called a boiler for gas or oil.  

A small machine named pump is also designed and stuck to the boiler, but another wire connected with the boiler goes through a series of systems like hot water radiators. Furthermore, small tubes are constructed to transmit water while hot water radiators are built to release hot water in the system. 

Strikingly, only by dint of an endless and closed connection between devices can the system work smoothly and effectively to serve households.