Re: [OT] Thermal Stores for hot water/heating

[Chris Hunter <cjhunter@xxxxxxxxxxxx>]

IIRC, ther are two sorts of mains-pressure hot-water systems ...
those that pressurise the tank, and those that don't ... the latter
being the safer & more maintenance-free, I should think, and becoming
the more common ... goodness knows why it wasn't thought of earlier,
but then that's always the case, it seems, with good ideas !

Chris


On 29 May 2007, at 23:25, Paul Gale wrote:

> I'd be interested too - will be talking to my plumber shortly
> although we have a pressurised hot water system planned for DHW
> (and all cold off of mains rather than the current two huge tanks).
> Heating system will be straight from the boiler currently - will
> ask about this system.
>
> Paul.
>
>
>
>> -----Original Message-----
>> From: ukha_d@xxxxxxx [mailto:ukha_d@xxxxxxx] On
>> Behalf
>> Of Jonathan Shaw
>> Sent: 29 May 2007 22:28
>> To: ukha_d@xxxxxxx
>> Subject: [ukha_d] [OT] Thermal Stores for hot water/heating
>>
>> I read a lot about hot water cylinders before talking to plumbers
and
>> decided that with underfloor heating + radiators & a
condensing
>> boiler that a thermal store was the best option as theory is that
>> even when heating the house (rather than water) the themal mass of
>> the heatstore gives the boiler something to work on and
>> prevents/reduces boiler cycling/ inefficiency associated with
>> condensing boilers and zoned heating whre only one room may be
>> calling for heat.
>>
>> None of the (getting on for 10) plumbers I have spoken to think
this
>> is a good idea.  All generally vague reasons that seem to centre
>> on "I fit what I know" rather than listening to
customer; oh and the
>> annual service for the pressure relief valves needed for unvented
>> cylinders, nice litle earner.  One suggested in hardwater areas
the
>> heat exchanger would calcify, but Googling doesn't seem to back
this
>> up.  Naturally eh suppliers (Chelmerheating, Nu-heat, Gledhill)
all
>> deny this is a problem.
>>
>> Are there any heating engineers on the list that can offer advice?
>> Or anyone with a thermal store in a hardwater area?
>>
>> TIA
>> Jon
>>
>>
>>
>>
>>
>>
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