Bracknell Gas Boilers
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What makes a condensing boiler more efficient?

A condensing boiler utilises some of the heat normally lost through the flue gases, by cooling the flue gases, causing them to condense. To operate in condensing mode it is important that the water returning to the boiler is at a low enough temperature to allow this to happen.

What is a combi boiler?
What are the advantages/disadvantages of a combi boiler?
How reliable are modern boilers?
Does a new boiler have to be fitted on an outside wall?