Re: Which goes first? the Fan or the Radiator?
It all gets down to effeciency. It is well documented in AC work on commercial units it's allways more efficent to suck through a coil. Sucking will give you near 100% effiency. Blowing through a coil your effiency is normally less than <90%, depending on how much air gap you have. When blowing you generate high air flow through part of coil, with other parts near zero. So you only use 70- 80% of the coil.
But the key is having a air gap whether you blow or suck. Most of these small fans have limited static pressure they can generate. I know this does not really help with your confined space. You just need to test to see which gives you the best performance.
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