On 24 Dec 2005 02:33:11 -0800, "Mungo" wrote:

Care to elaborate Andy (yeah, I know I should Google for "blending"
but tis the
season of goodwill :-)

Mungo


I see.

A Google on { under floor heating conservatory } would work

The point, as was mentioned, is to reduce the water temperature going
into the floor tubes. Normally this is done using a blending valve
plus a pump. The principle is to mix some of the return water from
the UFH circuit with the flow water coming from the boiler so that you
have a lower temperature flow into the UFH circuit.

You can buy complete packs for this.

e.g.

http://www.nu-heat.co.uk/onezone/

I noticed that there is a complete installation manual on their site
which has blow by blow details of what's involved.

Hepworth also do a pack with a much simpler idea - basically a valve
which operates based on return water temperature and restricts the
flow. Obviously cheaper, but not as accurate and doesn't limit
inbound flow temperature - could be an issue with the floor as has
been said.

I think that I would probably look at the information in the Nu-heat
solution (there are others like this) and then look at sourcing the
components elsewhere if it looks less expensive.


--

..andy