HEPA filter
thingiverse
This is a straightforward design for a HEPA filter. The filter can be equipped with either one or two 12V turbofans, such as those found on eBay at https://www.ebay.it/itm/DC-12V-24V-Cooling-Fan-Blow-Radial-Hot-End-Extruder-50mm-For-3D-Printer-Parts/192192426968?hash=item2cbf8fb3d8:m:my0wC3921GaHkZdEIbQva5w. To assemble the version with two turbofans, simply print HEPA filter.stl twice and attach them together using a screw. For the single fan version, print both parts of the stl and join them securely with screws. Attach the fans to the filter pieces using a small amount of superglue. The filters themselves are affordable, priced at 5 euros for 10 pieces, similar to those found on eBay at https://www.ebay.it/itm/10Pcss-HEPA-Filter-for-ILIFE-v1-v5-v5s-v3-Robot-Vacuum-Cleaner-Replacement-Parts/123019969064?hash=item1ca48fc228:g:QaMAAOSw2hhcd389. To complete the project, simply slide the power cable under one filter and attach it to a surface using screws. Make sure to create ventilation holes for optimal airflow.
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