Boilers and systems are one in the same thing but also different! Confused? Okay we’ll help clear things up for you..
Boilers are a heat source element. Boilers go right back to Rome times when the Rome’s needed a way to heat homes of the important people in Rome and Cesar! Also they wanted a way to heat swimming pools!
Rome engineers designed the first boiler to heat this by having a main fired heat source that pasted hot water/heat around the home or swimming pool. It’s that simply really. So the modern day boiler is a heat energy source. It’s normally heated by natural gas but can also be heated by propane oil or even coal! In the boiler is a heat exchanger which is like the engine of the boiler. The heat exchanger is filled with water which is normally pumped through a system of pipes connected to radiators. However the system may not be pumped as old systems used gravity to push the heat around the system. This works by heating the water so it gets hot and then the force of the heat forces it to rise and move around the system.
Most systems now days do have a pump in which pumps the heated water around the system. The boiler has a gas valve and thermostat connected. The thermostat will shut off the boiler when it reaches the set temperature. There are different types of boilers that are used to heat hot water or a heating system. These boilers are:
These boilers are pressurised for the heating sided so there is no tank in the loft to feed the heating. Also the heating pump is inside the boiler. The hot water is heated up instantly through the hot water heat exchanger. So these boilers have two heat exchangers.
System boilers are like a combination boiler but do not have a hot water side to them. System boilers are pressurised and are used to heat the radiators, hot water cylinder or both.
These boilers just have a heat exchanger and a gas valve. These boilers are used mainly on conventional systems to heat hot water and radiators.
Systems are what the boilers are connected to. These systems can be radiators, open vented and unvented hot water cylinders, underfloor heating systems and swimming pools! The systems also consist of a flow and return pipe work.The boiler heats the water and it when flows out of the boiler and around the system. On a radiator system this would be the flow into a radiator. As the system flows to the last radiator it returns through a return pipe back to the boiler which is known as the return heating pipe work.
This is the whole in and out of boilers and systems. Please see the drop down list of boilers/systems for further information on these boilers.