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

["Paul Gale" <groups2@xxxxxxxxxxxxxxxx>]

Are they not quite expensive though?

Paul.

> -----Original Message-----
> From: ukha_d@xxxxxxx [mailto:ukha_d@xxxxxxx] On Behalf
> Of Mal Lansell
> Sent: 29 May 2007 23:33
> To: ukha_d@xxxxxxx
> Subject: Re: [ukha_d] [OT] Thermal Stores for hot water/heating
>
> They're not very common, so I guess most plumbers won't know too much
> about them.
> I had a flat once that had a thermal store - it worked great.  You get
> mains pressure hot water without the crap performance and constant
> cycling every time you turn the tap on.
>
> You can get vented thermal stores - there's no need for them to be
> sealed and pressurized (except to earn the heaitng trade their annual
> maintenance fee, as you mention).  The vented ones don't need building
> control approval either.
>
> The calcification issue sounds like B.S to me.  The water flowing
> through the boiler is not being constantly refreshed - it's no more
> likely to calcify than in a regular hot water tank system, and you can
> add all the inhibitors etc you want.
>
> Mal
>
>
> Jonathan Shaw wrote:
>
> > 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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