On 23 Dec 2005 23:28:41 -0800, wrote:

Andy Hall wrote:
On 23 Dec 2005 07:50:16 -0800, "Mungo" wrote:

At the same time, install my proprietary underfloor heating but plumb
this permanently
off the central heating system.

Thus under normal circumstances the underfloor heating ought to keep
the conservatory
comfortably above freezing, but when you need it you can kick into life
the wall
radiators.

Any thoughts on my scheme ?


Quite reasonable. UFH with a concrete floor is relatively slow to
react because of the heat capacity of the concrete. However, if you
adjust it seasonally it should be reasonable.

There does need to be an additional zone for the UFH to comply with
building regulations, because you need to be able to show that it can
be turned off.


I'm told the CH water temp in the UFH would crack conrete or warp wood
though.


Mmm. Good point. There should be some kind of UFH blending device
to reduce the temperature.


--

..andy