Ideas for fume extractor

[grevan]

Hi guys,
i´m developing an idea for a fume extractor.
For now i have maybe a silly question, which of these two setups do you think would have a stronger air flow power? With the carbon filter in between or before the 2 coolers? 
Of course i can use just one powerfull cooler, but i´tm thinking of getting not so expensive ones.
Thanks

[BobsURuncle]

The filter in between the fans I would expect to produce more flow.  The back fan will not do much work if it is directly behind the front fan spinning at about the same rpm.


 

[Gyro]

You'd be better with the two fans side by side with a filter on the output side of each. Without getting too scientific, fans always 'push' better than they 'pull'. 

[jonovid]

you could add a dust filter for a super clean air room.
& or maybe port the fan's to reduce fan blade noise.

[Cliff Matthews]

Pull or push, I prefer surplus centrifugal compressor-type fans for this task (and mostly, they're quieter too).
Mount in box with a circular hole to pull air through a plastic dryer hose, and let it push air through any cheap HEPA filter hot glued on the side.