Boiler Questions

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Ableman
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Boiler Questions

Post by Ableman »

Hi, I was just wondering if anyone knew why my Grant Vortex Combi Condenser Boiler comes on when I turn the cold water tap on? I would expect it to come on only when I turn on the hot tap. Do I need to put in a non return valve? It has a reserve hot water tank.
I was also wondering if its cheaper to leave it on all the time or switch off at night.
Many thanks
Tony
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aeromech3
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Post by aeromech3 »

For the experts to advise but is it a pure cold feed tap or a monobloc (cold and hot)?
The jury might be out, but leaving DHW on all night with a reserve tank, the boiler might have many short cycles which do not achieve condensing state and therefore less efficient.
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Ableman
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Boiler Questions

Post by Ableman »

Thanks its a monobloc but same used to happen with 2 separate taps.
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