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

["Nigel Giddings" <nigel@xxxxxxxxxxxxxx>]

Jon,

=20

You would get a lot more answers, and it would be On Topic over on
UK_Selfb=
uild (Yahoo Group).

=20

I have a system pretty much as you describe. As you say many British
Plumbe=
rs/Heating engineers (loose use of term) steer well clear of such
=91compli=
cated=92 systems. I installed myself, previous experience being DIY
plumbin=
g including two previous wet heating systems (radiators) in previous
houses=
.

=20

My boiler does not cycle=85 I have the UFH portion of the store set to
appr=
ox 35 degrees at the moment, we haven=92t moved in yet, and the boiler (a
m=
odulating model) comes on at full tilt, heats, and shuts off. It doesn=92t
=
even modulate. You can see the burn rate from a row of front mounted LEDs
(=
Keston).

=20

There is an issue around the pressure releif valve service. A service
consi=
sts of turning the knob to check for free movement. My system has two, a
co=
mbined pressure/temperature device on the store and a second pressure
relea=
se on the expansion vessel.

=20

I would suggest a water softener if you are in a hard-water area, to
protec=
t your heating system, to reduce cleaning of baths, sinks, basins and
showe=
rs, protect your washing machine, remove the need to add salt to your
dishw=
asher and also for the more pleasant washing experience=85. If you are
goin=
g for Mains Pressure Hot water you will probably need a high flow version
w=
ith a high flow kit=85

=20

My system was supplied by Chelmer Heating, they appeared knowledgeable=85.

=20

You may be able to view pictures here if my phone cable up the garden is
no=
t too wet=85.

=20

HYPERLINK "http://photos.corbenic.co.uk/img_0301.html"http://photos.corbeni=
c.co.uk/img_0301.html

=20

HTH

=20

Nigel

=20

-----Original Message-----
From: Jonathan Shaw [mailto:semi.jon@xxxxxxx]=20
Sent: 29 May 2007 22:28
To: ukha_d@xxxxxxx
Subject: [ukha_d] [OT] Thermal Stores for hot water/heating

=20

I read a lot about hot water cylinders before talking to plumbers and=20
decided that with underfloor heating + radiators & a condensing=20
boiler that a thermal store was the best option as theory is that=20
even when heating the house (rather than water) the themal mass of=20
the heatstore gives the boiler something to work on and=20
prevents/reduces boiler cycling/ inefficiency associated with=20
condensing boilers and zoned heating whre only one room may be=20
calling for heat.=20

None of the (getting on for 10) plumbers I have spoken to think this=20
is a good idea. All generally vague reasons that seem to centre=20
on "I fit what I know" rather than listening to customer; oh and
the=20
annual service for the pressure relief valves needed for unvented=20
cylinders, nice litle earner. One suggested in hardwater areas the=20
heat exchanger would calcify, but Googling doesn't seem to back this=20
up. Naturally eh suppliers (Chelmerheating, Nu-heat, Gledhill) all=20
deny this is a problem.

Are there any heating engineers on the list that can offer advice?=20
Or anyone with a thermal store in a hardwater area?

TIA
Jon

=20


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