Sorry if this is hijacking but I'm contemplating a vortex w/speed control and carbon.

Could you push air across cool tube, then into carbon scrubber?

Basically, outside air > vortex > cool tube > carbon?

I'm looking for a 1 fan solution if possible. Only running 400w in a fairly good sized room. Runs of duct would not be more than a few feet each. Thanks for any input.