redleader that was pretty much what i was thinking of to start with
then I did the sums and realised it'd take something like 50 to 100m of pipe (
) to make something usefull :shrug:
Butcher, I'm not that certain that a few microns of paint would completely anihilate a hypothetical 5-15% gain in heatloss through radiation ? (yes, hypothetical
)
Anyone know the thermal conductivity of paint offhand... ?