Air filter for 3D printer enclosure

thingiverse

I made this to filter the air in my printer enclosure. It cycles the air through a HEPA filter and a bunch of activated carbon. With it I can print stuff like ABS and there is no smell at all. It's designed to contain the specific HEPA filter linked below. HEPA filter: https://www.amazon.com/gp/product/B07RSZF32W I used these other items with it as well: Activated carbon: https://www.amazon.com/gp/product/B00GKVNI8E 120mm fan: https://www.digikey.com/en/products/detail/delta-electronics/AFB1212VH/2560462 Power supply for fan: https://www.amazon.com/gp/product/B06Y64QLBM 2 inch air ducting: https://www.amazon.com/gp/product/B00KQPCE8A You print all three parts, screw the fan into the middle plate, stuff the filter inside, fill the HEPA filter's interior with activated carbon, lay some thin cloth over the top to keep it in there, then stick the cap on and it should lock it all together. Finally, put the 3 parts together and wrap the seam in duct tape. It's really straightforward. Use some 2 inch ducting to connect it to your enclosure. There are two ports on the nozzle attachment, pipe both to your enclosure so it will run in a closed loop cycling the air inside your enclosure. This seems way better than setups that exhaust out to your room. Maybe it's overkill, but it's hard to be sure. I've also got my printer in my cold basement and I don't want to be pulling cold air into the enclosure. So there is that reason for this kind of setup as well. You can use any 120mm fan so long as it has decent static pressure. The one linked above is the one I used, which I pulled from an old server. It's a 0.371 in H2O static pressure fan. Anything like that should be fine. I wouldn't worry about noise much as the fan is embedded pretty solidly behind a decent amount of PLA. I can hardly hear it when running even though it's a loud fan out in the open. Also the whole thing prints fine without supports. Print the nozzle attachment part upside down so that supports aren't needed.