Hi Eric

No I haven't looked at the payback period, but for me there's more to it than
financial gain.

Where the UFH pipes drop down through the wall to the UFH manifold assembly,
they pass through the wall of my baby boy's bedroom and as a result, they heat
the wall up. When the weather is warm we really struggle to keep his room cool
as it is, so having part of the wall acting as a radiator when the heating is
off does not help matters!

With hindsight I'd have routed the pipes differently, or at least chased them in
deeper and insulated them somehow where they run behind plasterboard. As it is,
they're embedded

I have identified a better, much more direct (and horizontal) route for the UFH
supply pipework that I will change to, but this involves chasing out the wall in
our dining room and creating lots of mess - and until I get round to making our
living room habitable, the dining room is our living area and I can't go making
mess with the littl'un round....
Who'd be daft enough to have kids part way through a selfbuild eh ?!!

So when it gets cold enough that we start to need the UFH again, I'll look at a
2-port valve (not that expensive). For now though I've just turned the isolation
valves off, and turned off the room stats so they don't call for heat.

Cheers
Lee

--- In UK_Selfbuild@..., Eric MEARS <Eric.Mears@...> wrote:
>
>
>
> That would indeed cure the heat loss - but have you calculated the payback
> period ?
>
> I haven't done so either but suspect that it might be quite a while.
>
>
>
>
> Regards
>
> Eric Mears
> CHESTERFIELD
> Derbyshire
>
> -----Original Message-----
> From: Lee
> Sent: Tuesday, July 07, 2009 9:15 PM
>
>
> The solution as far as I can see is to fit a 2-port motorised valve, powered
> by the UFH pump supply, so when the pump is off, the pipes are closed.
>