On Mon, 03 May 2004 21:57:02 +0100, Pete C
wrote:

Hi,

The cooliing effect comes from the liquid in the 'flow' pipe changing
to a gas which returns in the other 'return' pipe, so having them
together won't matter.

The insulation is mainly to stop condensation forming on the colder
return and dripping everywhere, it will also stop any stray heat
coming from the flow pipe too.

Hi,

I might be slightly wrong on this, it would be worth asking the
manufacturer or on somewhere like:

www.refrigeration-engineer.com

cheers,
Pete.