UFH upstairs, (Living area) but just run a flow and return from
downstairs bedrooms/CH for towel rad. in upstairs shower room then out
to garage (preparation for the gym conversion) for rad (also usefully
for drying dirty wet dogs towels.

Anyway. reading the on-going boiler efficiency thread, I thought.... If
I run the return alongside the Hot-Water pipes upstairs, I could dump
some of the rad. return pipe heat to the hot water pipe giving a
pre-warmed hot water feed in the kitchen, and colder return feed to boiler.

All I want now is some method of efficiently "strapping" the rad return
to the HW pipe in order to shuttle heat across.

Any ideas?
The HW - CH return pipes are spaced the width of 2 pipe clips so about
3 cm apart.

One final thing, is it OK to use silicone sealer as a pipe "clip" and
where pipe goes through joists to prevent pipe "creeeeak" ?

TIA
Pete

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So, when your CH isn't running, you want to cool your hot water before it
gets to the kitchen?

Newshound wrote:
So, when your CH isn't running, you want to cool your hot water before it
gets to the kitchen?

Doh!
Didn't think of that.

8¬(

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Pet @ www.gymratz.co.uk wrote:
Newshound wrote:
So, when your CH isn't running, you want to cool your hot water before it
gets to the kitchen?

Doh!
Didn't think of that.

If you get the coupling right (heating in a few mins), then it won't
really matter.

It won't cool the water appreciably in the time it's running past the CH
pipework.

Ian Stirling wrote:

If you get the coupling right (heating in a few mins), then it won't
really matter.

So perhaps some triangular(ish) shaped Copper straps with the wide bit
on the CH pipe and the pointy end on the Hot-water making for better
heat exchange to HW pipe and not so good the other way round

It won't cool the water appreciably in the time it's running past the CH
pipework.

I did wonder that, as it would take much more than a a bit of conduction
to offload the amount of heat carried to the tap whereas a constant heat
dump from CH return pipe when running _might_ be of benefit in keeping
hot water pipe hot.

idea back on track
:¬)

Pete