On Wed, 22 Sep 2004 13:57:25 +0100, "IMM" wrote:


A DHW only heat bank is best as one layer of heat interchange is
removed.

Exactly.

A "direct" one.

And one feed the CH from it as well using a weather compensator to raise and
lower the CH section of the store.


No, no, no. The store should be for DHW only and the CH operated
totally separately and directly from the boiler.


..andy

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