Three 120mm molex PC fans arranged in series, wired in parallel. 12 volt. Power supply rated at 1.25 amps.
Hardboard enclosure, only six segments (slit in top to insert / change central fan). End fans are accessible. Whole thing held together by 15mm/15mm pine skeleton in the internal corners. And gluuuuue.
Performance wise... incredible! Solder fumes, banned smoke when I'm leaning over a PCB, all sucked right through and out the window!Cannot take a photo fast enough to illustrate its effectiveness.
Above all, really cheap and quick to make. All the joinery only took a couple hours from measurement to completion. Fans only cost a couple quid each. Niiiice.
Oh and I'm flaunting my Hakko FX888. Bought the UK model (Adafruit Industries import and sell the US model ((tool is Japanese in origin)) ). Performance of this iron is other-worldly. And the replacement tips are CHEAPER than replacement tips for irons of far LOWER sophistication. It's probably my favourite tool in any category I've ever owned. AFI really chose a fantastic product for the line in the FX-888.

