dust filter for computer fan

thingiverse

I have a 14 cm fan on a low power computer for cooling, And I put it to work ... to filter my air :) . Used some filter cloth material from a pollen filter and added a structure to hold the filtering material - in the photo after two months of work - more dust in filter, less in computer and air :) . Inner circle may require adjustments if you use thinner or thicker filter material.