Bambu Lab Integrated HEPA Carbon Aux Filter

Bambu Lab Integrated HEPA & Carbon AUX Filter

The filter magnetically attaches to the stock AUX fan and is therefore controllable from Bambu Studio/Handy app or via gcode. It can be uninstalled without any damage if you want to go back to stock or resell your printer, fast filter changes, no screw holes, no extra cables and no extra fans required. You can automate the process by adding gcode to the end of the print. Something like, wait 5mins after the final extrusion, switch on aux fan to 30% for 2mins, then switch aux fan off and complete. If you can't be bothered to automate it via gcode you can manually switch on the aux fan to 100% before you open the door. It only takes a few seconds to completely clear the cabin from VOCs and particulates when you switch the aux fan on to 100%. The filters are both HEPA and carbon and cost £20/$20 delivered for a 4 pack via Amazon. Links in the description below for both the magnets and the filters.

You will need 6x 6mmx3mm round N52 neodymium magnets https://www.amazon.co.uk/HHOOMY-Neodymium-Magnets-Refrigerator-Permanent/dp/B07Z8X8J8X/ref=sr_1_6?crid=2N1RF1HBQDWBT&keywords=Magnets+6mm+X+3mm+n52&qid=1680906048&sprefix=magnets+6mm+x+3mm+n5%2Caps%2C75&sr=8-6 and a GL2103 HEPA carbon filter https://amzn.to/3kZ6Lpm. Carefully clip off the plastic housing that is attached to the HEPA filter so you are left with just the actual filter element. Use ABS or PETG to print the new filter housing assembly, I recommend eSun black ABS+ if you want a matte OEM finish https://amzn.to/3IZ0imd. It is designed to print without supports and you do not need much infill but use enough so the top layer is flat. Once you have the filter housing printed fit the magnets with a very small amount of adhesive on the back of them whilst making sure they are perfectly flush with the surface of the housing (don't use CA glue as it might leave white marks, JB weld is much better). You can make sure the magnets are flush with the surface by turning over the assembly with the magnets fitted and pushing it down on another flat surface and leaving it until the adhesive is fully cured. Next you need to remove the cover for the aux fan. The fan itself is held on with 3 screws and some double sided tape then cover is held on with another 3 screws. Carefully remove the cover and leave the fan attached to the printer. Line up the printed filter assembly with the aux fan cover then place the remaining 3 magnets loosely behind the aux cover, the magnetism between the magnets will make them find the correct position just make sure the filter assembly is lined up correctly. Check one last time that everything is lined up and then cover the magnets in adhesive to secure them permanently to the aux fan cover. Don't touch anything whilst the adhesive is curing because it needs to set straight. Once fully cured reattach everything making sure not to trap the fan cable when reinstalling the screws.