installing a combi boiler

[Shelly]

If I want to replace my existing central heating boiler with a combi boiler will there be a lot of other work required? For example, does the pipework to the radiators or anything about the radiators need changing? Thank for any simple answers.

[pilotlight]

Shelly, The answer to your question depends on the condition of the existing system, and also the diligence of the heating engineer that you employ to carry out the work ( Corgi registered, of course ) . It is not always necessary to replace pipes or radiators. Should nothing require replacing, your engineer will probably suggest that a cleansing agent is introduced into the existing system before the replacement boiler is installed, ( this may add a few ��'s onto your bill, but it should ensure that any existing sludge will be removed ,therefore protecting your new boiler ). Your extra outlay should be re-couped in the decrease in next years gas bills.

[stanleyman]

Just a few points that pilotlight aka electronic ignition has forgotten (it's his age and flickering flame, poor love). Your boiler will need to be a high efficiency condensing type now and assuming you have an existing hot water cylinder, some alteration of the heating may be needed there in addition to the hot and cold supplies that will need to be run to the boiler position. Sometimes the main water supply needs upgrading to cope with the instant demand. Generally there will be less pipework.

[theo_wyvern]

you may also need the valves on radiators replaced as you get a fairly decent pressure from combis !