Well there is 12mm gap between the two. That's also why I want to pipe in cold air. If I draw in air from the top of the unit and pipe in cold air, it doesn't much matter whrer the exhaust goes after that. It is definately expelled out the gaps in the top cover of the case and out the vents at the back.
just need a quite small fan and it should be good.
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-- Murray I What part of 'no' don't you understand? Is it the 'N', or the 'Zero'?