Room Air Filter

thingiverse

The room air filter I originally had eventually started sounding like an imbalanced jet engine spinning up to speed - and tearing apart. Disassembling it to find out what caused the imbalance revealed very little about the issue. However, it became clear that it was simply a computer fan pulling air across a filter. Adding a circuit board to control power turned the entire thing into a functional room filter. This design relies on minimal support material and is built in multiple pieces for ease of printing - allowing it to be printed on various-sized machines. An Arduino Uno generates a PWM signal for the fans and reads a potentiometer to control fan speed. Two PC fans pull air, while an off-the-shelf air filter completes the package. UPDATE: 4/30: The filter has been in use for two months now - mostly with the fans running at high speed. It's due for replacement. I've uploaded before (new) and after (used) photos. The used filter was run continuously on high speed for two solid months, non-stop.