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A combi boiler also known as a combination

A combi boiler, also known as a combination boiler, provides heat for central heating and domestic hot water upon demand with a combi boiler heating system you do not require feed and expansion tanks in your loft space or a hot water storage cylinder, therefore saving space. Thermal efficiency is a rating based on the unit’s operation under ideal conditions it is often higher than the afue rating because all variables.

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