For an upcoming build of a variable speed box fan with filter setup I've modified this design to accommodate 2"x20"x20" filters on a box fan.
You'll probably want to print it out of PETG, if possible, for a bit of give in the plastic when clamping it on.
I've now got the video fan box filter with variable speed controller build up, Video and Article here: https://pcburn.com/box-fan-filter-variable-speed-fan-build
Category: Parts
The author marked this model as their own original creation. Imported from Thingiverse.