Combi Boilers – Pros & Cons of Gas Combi Condensing Boilers

By Rob Hull on July 23, 2010

Combi boilers, also known as combination boilers, are highly efficient condensing boilers that take up very little space within the home. They are now used in the majority of new boiler installations in the UK because of their size and the fact that they are highly efficient.

The combi boiler is different from other types of boiler in that the need to store hot water is eliminated, making a hot water cylinder within an airing cupboard unnecessary.

The name ‘combi’ refers to the fact that these boilers work not only as an extremely efficient water heater but also as a central heating unit as well.

Why choose a combi boiler?

Firstly there is protection from sudden changes of water temperature while you are in the shower due to thermostat controls. Most combination boilers have these controls and they often come as standard.

Secondly, if you don’t have much roof space for the installation of a different type of boiler or you want to use the loft space as a room or in some other manner then a combi boiler is probably the best choice for you.

Thirdly, if you are upgrading the boiler on an existing system then this type of boiler is easily the most efficient type around. Lastly, it may not be convenient for you to have to wait for water to heat up if there are a large number of people in the home – a combi boiler heats water on demand.

Advantages of a combi boiler

Normally with a combi boiler there is a simple compact unit in the kitchen or utility room or occasionally in an airing cupboard. Space is saved due to the lack of a hot water storage unit, a cold water storage unit and other components that usually make up a normal heating system.

The major advantages of this type of boiler are the monetary savings seen on the cost of hot water, the fact that you get water out of the taps or shower at the same pressure as if it was from the mains and the fact that there are no tanks being placed in the roofing and less pipe work to install. This in turn means installation is faster and not as difficult thus reducing initial costs as well.

As combis are so common boiler service costs should be relatively low whilst parts and engineers easy to find.

Disadvantages of a combi boiler

There is only one real disadvantage to these boilers and that is that in order to get hot water on demand you need an adequate supply of cold water. This means that if a large number of taps or showers are using hot water at the same time then the flow to each one is reduced depending on the amount of power your combi boiler has. Consequently, if the mains water supply is not adequate or you have sudden pressure decreases then this type of boiler is not suitable for your situation.

Conclusion

There are a number of advantages to the combi boiler such as hot water on demand and cold water coming from the water main thus eliminating the need for a cold water tank and a hot water cylinder. They are also highly efficient and can often generate significant savings on gas bills.

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Save up to £235 per year with a new condensing boilerDid you know new style condensing boilers recycle heat that would have otherwise been lost? this could save you up to £300 per year!

This not only helps you reduce your bills but also the environment by lowering your Co2 emissions. You can request quotes for a new high efficiency boiler here.

 

 

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Boiler servicing can save lives

Regular servicing ensures your boiler is running at peak efficiency saving fuel and money but more importantly it could also spot the escape of potentially lethal carbon monoxide, which could just save your life.

Servicing typically costs between £50-£80 so what are you waiting for?

Every year Boiler Guide helps thousands of homeowners find reputable and rated heating engineers for new boiler replacements and service jobs. Here are just some of the recent boiler quote requests we received and sucessfully completed:

New & Replacement Gas Boiler Installation (ECO grant funded)

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SL6 - Current boiler: Worcester 24 LE combi. More than 8 years old. Located in the bathroom. Copper pipes. Working but unreliable. Benefits: State Pension Credit. Contact: Anytime

Maintenance/Repairs of Gas Central Heating Systems

NG1 - Combi boiler (Ariston) cuts in and out while hot water in use. Hence no shower can be used.
CV1 - Current boiler: Main Combi 20HE. 2007. The boiler turns off on its own every time we use the hot water and we only use the hot water for 5 minutes and it cuts off itself. Repair ASAP. Call anytime. Appointments: anytimeCurrent boiler: Combi 30HE The boiler turns off on its own every time we use the hot water and we only use the hot water for 5 minutes and it cuts off itself Benefits: childtaxcredit,workingtaxcredit-under16

New & Replacement Gas Boilers

LE11 - Current boiler is a baxi 105e. - water leak. Quotes for a combi - worcester ideally to be located same place as current boiler in the room under hole (accessible) Call anytime.
CW1 - Current boiler: 14yrs. in airing cupboard in bathroom. Keep in same place. Stay with a combi. Call anytime Replace within a month. Appointments: anytime.
Wombourne WV5 - At present we have a ferolli combi boiler the heat exchanger has gone on it so now without hot water. Current boiler: 7/8 years old. Customer open to boiler suggestions. Located in airing cupboard. New one to stay in same location. We have a 4 bedroom house 2 bathrooms and conservatory. No hot water and heating customer wants work done within the month - maybe sooner.
S17 - Current boiler: Glowworm boiler probably 40 years old Extremely inefficient. Cannot separate heating and water. Does work. Keep in same place in garage but open to suggestions. Change to combi. Call anytime. Replace within a month. Appointments: anytime
TW2 - Currently have two boilers hot water boiler is not working. Looking at the option of a combi or keeping two boilers. Replace: ASAP Contact: any
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