I would like to hear from anyone who uses a bench top solder fume extractor.  I am confused as to the filters the different brands of extractor use.  For instance Inland uses an activated carbon filter, while the Smoke Absorber Filter for Aoyue  Fume Extractor seems to be just foam...... some brands refer to them as carbon actibated filters, which has left me pretty confused as to what to buy, and which replacemetn filters to choose..... Can anyone shed some light on all this, please?  NANCY