Fully functional air purifier that includes a washable hepa filter and active carbon filter. The model consists of three 3D printed parts for the body and four 3D printed TPU legs. You will also need a fan, the HEPA filter and a cuttable active carbon filter. The bill of materials includes links for all of the required materials (the power cord and the optional switch is are not included in the bill of materials as I don't have links for them). 
The construction begins with fitting the active carbon filter to the outer edge of the base. After that, fit the input cable through the bottom of the base. Make sure that the cables are long enough to fit all the way through the filter! After that, insert the filter and pull the cable through it. Next, insert the fan into the housing and pull the cables through the smaller opening. Connect the input power cables to the fan power cables. Make sure that the fan is pulling air through the filters! After that, screw on the fan housing into the base, screw on the top cover and screw on the feet. Lastly, insert the cable into the organisation groove and enjoy fresh air!
I printed mine using PETG carbon fiber using two walls.