Most desktop solder fume extractor that is available doesn’t work well, to suck in the fumes they either need to be very close or need to be on top of the parts your soldering. The filter that came with those extractor doesn’t work either, they are too porous to be able to properly filter the fumes. As an alternative, I’ve repurposed an air purifier as a fume extractor by fitting it with an adjustable duct.

Materials:

• Flexible duct tubing: https://s.click.aliexpress.com/e/_d8U2dMl
• eva foam:
• J&B weld plastic expoxy
• some old unused toolbox
• racheting nylon straps
• air purifier(xiaomi)

To mount the duct to the purifier I used a half side of a tool and bore a hole just enough for the duct to fit in. This will need to be reinforced since the duct is quite heavy and will need to glue in to stay in position.

Since the purifier I’m using lets air in on its side, I have covered it with an EVA foam and leave an opening just enough for the duct to increase the airflow in the duct even at low speed.

To hold the assembly to the purifier I’m using a racheting nylon strap which is good enough for now, but might have to find a better solution so that I could mount it vertically.

Here’s the extractor in action.

References:

• Dave Jones https://www.youtube.com/watch?v=ffaiKZMU0Lw