I am sometimes soldering in the field without any fume extraction available. I am trying to make a "circular" filter, that blows and sucks at the same time. Placing the solder job between the inlet and outlet. Somewhere in the circle is a carbon filter removing as much as possible of the fumes.
Tabletop smoke filter
![Tabletop smoke filter](/content/images/size/w2000/2020/02/DSC_0097_crops.jpg)