While there may be many factors in your choice of boiler, the most important is the basic type. There are three main types: system, conventional and combi.
The combi boiler
The combi boiler, or combination boiler, has now become the most popular type of domestic central heating unit used in the UK. The main reason for this is that they provide both hot water and heat and no water tank is required.
As noted above, there is no need to install a loft tank when you opt for a combi boiler. The boilers also provide unlimited hot water and heat and don’t take up too much space.
If you run two or more taps at the same time, the pressure can be significantly reduced. Thus, while they can be used in most homes, they are more suitable for smaller households.
The system boiler
The system-type boiler is often referred to as a sealed system. They generally include a water cylinder but no tank. The cylinder is usually installed in an airing cupboard.
Again, as with the combi boiler, a system boiler requires no loft tank. In addition, using many taps at the same time is no problem with a system boiler.
Hot water is not generally provided instantly. Should the hot water within the system run out, you will need to wait until more water has been heated. In addition, the cylinder needs a home, which can be a problem if you have no airing cupboard.
The conventional boiler
Often known as a regular or open vent boiler, these have both a tank and a cylinder.
They can supply hot water to numerous outlets at the same time.
As with the system boiler you may need to wait for more water to be heated and they require space for both a tank and a cylinder.
The condensing boiler
The word ‘condensing’ refers to an attribute of the boiler rather than its type. In other words, either a conventional or combi boiler can be a condensing boiler.
These are extremely energy efficient as they reuse the heat that would normally escape through the flue of a non-condensing boiler. Therefore, less fuel is required to provide the same amount of heat. Since 2005, this type of boiler has to be fitted by law, unless there are exceptional circumstances.
The energy-efficient boiler
Basically, every new boiler has to be energy efficient, while any that have been manufactured after 2010 must also come with an A-rating (at least 88%) for energy efficiency.
Stephen Powell looks at heatandplumb.com website from time to time, especially when she is looking to renovate her home.
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