Some countries don’t have box fans, but have round fans. “Presenting V1.0 accessible, effective and validated DIY filters using round fans inspired by the #CorsiRosenthalBox. They are the result of international collaboration from designers, engineers and advocates in @TheWHN Airborne… Read More »oldRound Fan Build – for countries with no box fans.
Here’s what the final build can look like with judicious use of duct tape. Pretty, pretty sharp: Here’s the actual build from the above Twitter thread. Here’s a more simple, slightly less effective single filter build by aerosol scientist, Dr.… Read More »old1 Filter Build – aka single filter strapped to the back of a box fan.
Here’s one as a goal – it’s the same triangle filter as in the video, but with a shroud added for optimum performance, and adhesive contact liner layered over the cardboard. Beautifully done! This was what it looked like before… Read More »old2 Filter Build – Forms a Triangle – top and bottom are cardboard.
End goal: Shopping List – the below links may quickly no longer be valid, so including a description of each item. No affiliation with any company whose products I have listed: 20″ Box Fan. Tape. Filters. Build time! Tape the… Read More »old5 Filter Build – The Original Corsi/Rosethal Box where the top is a fan, and bottom is a filter.