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What are the advantages and disadvantages of a combi boiler?

Advantages and disadvantages of a combi boiler

Are you considering replacing your boiler? There are three types of boilers available; combi boilers, system boilers and regular (traditional) boiler. System and regular boilers require separate tanks in order to provide your home with hot water.

A combination boiler generally referred to as a combi boiler will provide your home with both heating and hot water.  This negates the need for hot water tanks or cylinders, making combi boilers perfect for small and medium homes or those short on space / without lofts.

Benefits of a combi boiler

Combi boilers heat water on demand directly from the mains.

Modern combi boilers are very efficient and cost effective as they heat water instantly rather than storing heated water in a tank which can lead to wasted hot water.

Showers powered by combi boilers do not require a separate shower pump as the water is taken at mains pressure.  Shower pumps are generally expensive and can be subject to breaking down.

Combi boilers come in a variety of sizes both in terms of output (kW) and unit size. Larger homes with more than one bathroom can benefit from floor standing combi boilers such as the Worcester CDi Highflow.  Homes with less space can opt for a compact design many of which can neatly fit inside a standard kitchen cupboard such as the Worcester Greenstar i.

There is also no risk of pipework freezing in the loft during cold winter months and generally less pipework makes can make installations cheaper.

Potential pitfalls of a combi boiler

However not all homes and families are suited to a combi boiler. Because combi boilers take water directly from the mains supply if more than one person is showering simultaneously there can be a decline in water pressure.

Older properties with original pipework may not be able to handle the higher pressure water and therefore would not be suitable for a combi boiler.

An important point to note is that combi boilers do not have a backup immersion for hot water.  Therefore if you do suffer a breakdown you will be without both heating and hot water.  Those with a system boiler or regular boiler in the event of a breakdown can use their immersion for hot water until the boiler fault is rectified. have an immersion that they can use to get hot water.

Large family homes with multiple bathrooms may prefer a system boiler with a hot water cylinder so that multiple showers can be run at the same with no compromise of water flow water temperature.

What next?

There are both advantages and disadvantages of having a combi boiler. During your home visit your heating surveyor will be able to look at your current heating set up and discuss your family needs and discuss the range of options available to you. For more information please call 01258 472132 or fill in the enquiry form.





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