There are a number of different arrangements of boiler, pipework and supply to the radiators; each systems has its own advantages and drawbacks.
A water central heating system consists of basically the boiler, the radiators and the interconnecting piping. The boiler heats the water and (normally) a pump circulates the water through the pipework and radiators and back to the boiler. There are a number of different arrangements of boiler, pipework and supply to the radiators; each systems has its own advantages and drawbacks.
At Emerald Heating we can advise on the best solution to your heating needs.