Loft conversion

27 May 2008
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United Kingdom
After a bit of advice, just in the process of starting to have the loft converted. We are going to have a bedroom and en suite.

Currently we have an unvented system with the shower been supplied by separate pump. Because of the height of the cold water header tank it seems I will need a negative head pump to supply second shower in en suite.

Can I tap off hot water from new pump to supply taps also?

Will I need to increase cold water header tank?

Will I need to increase hot water tank?

Is there any issues in putting a radiator up there?

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I think you mean you have a vented system as you say about a header tank a unvented hot water system has no header tank.
I would advise if you have the flow rate about 20 litres a minute and pressure about 2 bar to switch to an unvented hot water cylinder then you won't need a cold header tank in the loft.

If you have a header tank for the central heating I would advise switching
to a sealed system. You can then put a radiator where you like.
Your right that should have read "vented system"

Don't really want to go to the cost of changing the system around but will if I have to. Is not feasible to just add another pump (neg head)from existing hot water tank running shower and hot water taps?

Thanks for responding

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