HEPA filter for 120mm fan

thingiverse

This is my take on a HEPA filter that's printable on smaller printers, like the Finder (140mm limit). The filters used are the Kenmore 86889 - which are a pain to get in Europe, by the way. My advice is to split the hepabox in two parts, right through the middle and print twice. Each print takes about 4.5 hours. Doing so requires no struts, and allows it to be printed on printers with a smaller work area. Printing in two parts also allows for easy insertion and coupling of the two parts to remove the filter: slide it in and then slide the second part until closed in. This might require to remove the rubber/silicon gasket. Fanbox is designed for a 120mm fan, no holes, so you can either tape it or make your own after. First uploaded design, made with OnShape. https://youtu.be/lS7U-6CLIK0 Print Settings Printer Brand: FlashForge Printer: Finder Rafts: Doesn't Matter Supports: Doesn't Matter Resolution: 0.25 Infill: 0.15 Notes: HEPA box takes about 4.5 hours to print, each side. Fanbox takes about 9 hours to print. No struts needed if done in two pieces for the box, fanbox doesn't need struts or supports at all. Depending on your fan and fanspeed, a shroud might be needed to compensate for the negative pressure.