Tim wrote:

On Thu, 04 Nov 2004 13:25:33 +0000, Tim wrote:


After lots of helpful comments on my plight to redesign my Dad's CH
using a thermal store system, I was wondering if anyone could comment on
this underfloor heating component:

http://www.plumbworld.co.uk/186-0000

specifically: the "Return Temperature Controller"

It claims to be a way of avoiding a 4 port mixer + local pump assembly
by regulating the water return temperature.

The only thing I can see wrong is that it of course still presents 70+C
water at the inflow end of the underfloor pipework.

So parts of the floor are presumably going to get rather hot???



OK - one adittional thing... I just found the installation manual on their
website and it does mention that the heating pipe must be run in a
double-spiral config, so a flow and return pipe are alway adjacent.

Wonder if that's how they make such a simple system work? ie they are
relying on the thermal conductivity of the screed to reduce the
inflow/outflow differential and also using the return flow to indrectly
cool the inflow... Sounds didgey - but it *could* just work?

Dream on Tim.

When I levelled my U/F heated floor prior to laying laminate, you could
see the wet bits betweenteh double spiral, and the dry bits above it.

The doble sopral simply spreads teh overall heating effect more or less
eenly across teh total floor area.

It does not stop localised hot spots on the floor surface, still less
inside it.

I think you are asking for a cracked screed.




Timbo