On Wed, 1 Sep 2004 22:42:03 +0100, "IMM" wrote:


"Andy Hall" wrote in message
.. .
On Wed, 1 Sep 2004 17:13:05 +0100, "Christian McArdle"
wrote:

From the DPS site:

"GX units are only suitable for a vented boiler / heating systems with
a Feed & Expansion Tank."

I've never seen a presurised heat bank advertised. You lose many of their
advantages by doing so. They would require much more expensive type
approval, too. Unpressurised heat banks can be used with pressurised
central
heating systems with the use of additional heat exchangers and pumps (or
indirect coils). This is usually safer and more convenient.

Christian.

Exactly, but would need a total of three pumps in the system.

Are you saying pressurised heat banks don't exist?



No - simply that some are not suitable for pressurised operation, and
that if they are used pressurised that the regulations concerning
large volumes of pressurised water apply - must be installed
professionally.



..andy

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