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Unlike a conventional heating and hot water system a combi system

Unlike a conventional heating and hot water system, a combi system does not store domestic hot water it heats water directly from the cold mains, as you use it there’s no requirement for a hot water cylinder, no tank in the loft (and so less risk of freezing and flooding) and none of the connecting pipe work so you not only save space, but also reduce hot water costs – which can account for up to 60% of a typical domestic fuel.

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