ecoTEC Plus Combi LPG
A combination or combi boiler is the most common type of boiler system in the UK, it will provide hot water on demand and is a great choice for many homes. But it's not the best option for all.
Heat-only and system boilers are much better suited than combi boilers in a variety of situations, and the wrong type could lead to significantly higher bills or long delays for hot water.
Read on to learn more about combi, heat only and system boilers, and find out the pros and cons of each.
Unlike a combi gas boiler system, an open-vented heat-only gas boiler system (with a water tank) has components housed externally from the boiler, such as a circulation pump. This type of system will also usually require cold water, as well as feed and expansion tanks in the loft.
With a heat-only boiler (also known as a conventional boiler system), the hot water is stored in a hot water cylinder or hot water storage tank. You will also normally have an on/off switch - so you can heat water in the storage tank when you know you are going to need it, and leave it switched off when not in use.
heat-only boilers are better suited to larger households where several people frequently need to use hot water at the same time. They also require space for a cold water feed tank, usually in the loft.
System boilers, sometimes known as closed vent boilers, are the perfect choice if you think you'll need a heat-only boiler but don't want lots of external components. This is because many of these external components are built into the body of the boiler, as with a system boiler.
A system boiler still has a hot water cylinder, but the feed and expansion tank (usually in the loft) is replaced by an expansion vessel in the boiler. This also typically contains the circulation pump and may house some of the valves.