Boiler Repairs - One-Off Repair or Repair & Cover

Combi Boilers

Combi boilers, often referred to as combination boilers, are a form of condensing boiler. Combi boilers generate water on demand for your taps and central heating from within the boiler unit. Combi boilers are easily the most popular boiler type, accounting for over 50% of all new boiler sales within the UK. Having said this combi boilers are not suited for everyone and it is important to understand whether a combi boiler is right for you.

Most traditional central heating systems (regular boilers) store the boiler heated water in a copper cylinder in the airing cupboard to provide domestic hot water. Combi boilers do not require this hot water storage saving you valuable space and reducing heat loss from the previously stored water. As a result combi boilers can be more energy efficient than other boiler types.

Central heating systems incorporating combi boilers have fewer overall components. Combi boilers take their cold water feed direct from your mains supply. By installing a combi boiler the cold water feed tank, often housed in the loft, is also not required this can also save storage space and reduces the number of components in the system simplifying any combi boiler system installation. As combi boilers do not store hot water they heat water direct from the cold mains supply as you use it, this gives you the equivalent of a power shower without the need for a pump.

Are you looking for a cost-effective and efficient way to heat your home? Well look no further than the modern day combi boilers, they offer a superb way to add cost effective heating and an instant hot water supply to your home. They have many benefits the first being they take up far less space than traditional systems and are also highly energy efficient.

The simplicity of the combi boiler makes it a very popular option for homeowners. This is because it heats both your water and runs your central heating system hence the name combi, which stands for combined boiler and water heating. With combi boilers, you don’t need a storage tank in the loft or in a cupboard anymore. This is why when developers or new builds are done they tend to install a basic combi boiler which would usually take up valuable room space.

Combi boilers are very common throughout the world and you will find trained staff to help you with installation as well as servicing and repairs. Please make sure the people you employ have the relevant qualifications to be repairing a combi boiler or for that matter any kind of boiler. As the products are commonplace throughout the world it should be easy to find a trained combi boiler technician to help you with yours.

All combi boilers are quiet and unobtrusive and offer a real life solution for your heating and hot water needs. The other beauty of the system that is hot water is instantly available as soon as you turn the system on. This is a real advantage over the storage heater alternatives. Assess your needs carefully as to whether you need a combi would be the best option for you.

With there needing to be an investment up front for a combi boiler system it can sometimes be daunting to invest your money into this. However over a year if used in the right way can save you and your family a large amount of money. Combi boilers have to be an investment that you make and decide to use in those winter months. Combi boilers can be mounted on a wall in any room, although typically it would be in a kitchen or bathroom, as this offers quick and easy access for maintenance.

My advice would be to get a few quotes for a boiler system for your home and see if they recommend a combi boiler if they do then assess whether this is the right one for your needs.

Other factors to be considered before you install a combi boiler

One small disadvantage with a combi boiler is that although a continuous flow of hot water is constantly available, the water flow rate from combi boilers is not likely to be as good as with a traditional storage cylinder, particularly in winter. The power rating of the combi boiler needs to be matched to your family’s heating requirements. Heating water ‘on demand’, a major advantage of a combi boiler, improves energy efficiency but limits the volume of water available at any moment.

Because the combi boiler is fed directly with mains cold water, it is important to establish that the minimum design water pressure is available otherwise the boiler performance will suffer. For this reason a combi boiler is not always suitable in all areas and a site survey is often required to confirm the suitability of the water supply.

Is a combi boiler the right type of boiler for you?

Combi boilers have many advantages and are popular in the UK but combi boilers do not suit all homes. Instant heated water is attractive but not so if you are waiting to fill a bath and the water is being used to fill a sink in the kitchen. There are pages in this site which outline the advantages and disadvantages of each of the boiler types to help you make the right decision, installing a new boiler is expensive so you need to get it right.

If, having read the information, you need assistance you should find a trustworthy boiler installer to guide you. If you do not know one you can get assistance from British Gas. One of their Heating Advisors can visit you and assess which type of boiler is right for your home, providing you with a firm quotation for a new boiler and a new or replacement combi boiler if appropriate. The visit and quotation carry no obligations and are free, so there is really no reason to avoid the service. As you will have been helped by an expert you can be confident that you will learn which boiler and what power rating is right for your home.

Types of combi boilers

There are five ‘varieties’ of combi boilers.

A combi (instantaneous) boiler is the most widely used combi boiler type and directly heats incoming mains cold water to supply your taps, showers and other hot water points.

A combi (instantaneous condensing) boiler operates as an ‘instantaneous’ boiler but at somewhat higher efficiencies than the standard combi boiler.

A combi (storage) boiler is a variant of the Instantaneous combi boiler type above and is designed to give you better performance through the internal storage of heated water. The stored water also can give you better initial water supply from cold water mains on first turning on the tap. Once the stored heat has been used, this boiler will tend to operate as an ‘instantaneous’ type. Dependent upon the make and model, the improvement in heated water delivery will depend upon the size of water store, and this can vary widely.

A combi (storage condensing) boiler operates in principle as a ’storage’ type but at higher efficiencies.

Combined Primary Storage Unit (CPSU) – This is a special category of storage combi which will incorporate a very large water store allowing a high water flow rate to taps and another draw off points and to quickly heat radiators before the water store is used.

If you are looking for the best combi boiler for your home you first need to confirm that a combi boiler is the right type of boiler for you and what power output the combi boiler will need to produce. Combi boilers heat water on demand and save on space but this will be a poor choice if you have a large family and need several taps to be operating simultaneously.

No space use a combi boiler

If you are about to install a new gas boiler you should study a combi heating boiler if you have a shortage of storage space. All you need to fit the full central heating system is a combi heating boiler and balanced flue. With the inclusion of copper piping to transfer the hot water to the radiators to warm your house you will be finished. You could be surprised by this and ask whether we had forgotten about some parts. Central heating systems seem to need a hot water cylinder to store water, a feed and expansion cylinder in the loft and a water pump to move everything around.

These component parts are not required by a modern combination gas boiler. You will have no requirement for a hot water storage tank, the feed and expansion tank can be left out of the attic, the combi gas boiler also incorporates the other petite components. The consequence is that a lot of space is saved inside your dwelling house.

Combination heating boilers have been fitted for a while. Whilst they were first set up in Europe they are now a very popular gas boiler for fitting in the UK. It is has two main divergences with the system and normal type of heating boilers. On the central heating side you still have a fully pumped system but all the heated water which circles around is sealed in. This means that there is no need for a feed and enlargement cylinder in the loft. A second gain is getting rid of the need for the hot water storage cylinder as the boiler stocks its own hot water.

Hot water is developed as you need it, the heating boiler is aware of this when you switch on a hot water valve. The gas boiler can quickly heat cold water by using an integral heat exchanger. Water from the sealed central heating circuit is heated and is diverted to the hot water heat exchanger heating it up. On the other side of the heat exchanger cold mains water is heated before completing its journey to the hot water valve.

Automated priority is given to the demand for hot water over water being provided to the radiators to heat up the home. The moment the valve is closed the combi gas boiler will return to rendering hot water to the radiators.

So in conclusion and combi gas boiler can save you a considerable amount of space in your house.