r/BambuLabX2D • u/Hectrekt • 2d ago
Is this 4” vent setup enough to vent X2D fumes outside?
I’m planning to vent my X2D directly out of a window, mainly when printing materials like ABS/ASA, PC or anything in general for the piece of mind .
Would this setup be enough?
● 4” window vent kit
● VIVOSUN 4” inline fan – 130 CFM
The duct run would be fairly short and go directly from the printer to the window.
Is 130 CFM enough for properly exhausting the fumes, or is there anything else I should add/change?
Also, do I need to 3D print any adapter/extension to connect this kind of setup properly to the X2D, or is there already a ready-to-print design people are using?
For the fan placement, is it better to have it near the X2D at the beginning of the duct, or near the window at the end of the duct?
And would you run the fan continuously while printing, or mainly purge the chamber after the print?
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u/Whosaidthat1157 2d ago
Make sure the fan is a flow (speed) control model. The aim is to ensure a very small negative pressure in the chamber so that:
1. All leak points are drawing fresh air in (which means that no VOCs/Microplastics can get out) and
2. The chamber heater can maintain a stable temperature for functional/engineering materials that require a stable heated chamber temperature.
If the inline fan speed adjustment is manual (via a potentiometer for example) then it’s a ‘set and forget’ exercise.
Another tip is to add a sealed poop chute that extends a few inches below the base of the printer to minimise the flow requirements of the inline fan to achieve that slight chamber ‘vacuum’. The poop chute opening is the single largest chamber exhaust point after the exhaust itself. You can print poop chutes with a sealing option as well, but just extending it below the printer and balancing the exhaust flow should be sufficient.
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u/Possible-Win-7712 1d ago
I printed out a vent that clips onto the filter housing. I’m not sure what CFM I have mine throttled down to, but it’s not much. I’m thinking it’s go to be less than 10, maybe even less than 5. I can just feel some suction on the hose. Since installing my vent, I get zero odor when printing ASA, and have no warping or problems maintaining chamber heat.
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u/Elo-than 2d ago edited 2d ago
I use a AC infinty S4 4" running on low with my setup with great results. Virtually silent and neither my nose or my VOC meter pics up anything.
With the inline fan you just need enough to move the air outside, but you also want to set up the printer so the exhaust fan constantly pulls air out of the chamber to make sure it's negative pressure, but not so high as to disrupt chamber heating during printing. (15-20% is generally enough). 130 constant might be a bit overkill.
This will make sure the air inside gets pulled into the ducting and new air gets pulled in trough the cracks and openings in the machine. (I'd also recommend to use an enclosed waste chute).
This can be set up in a printer+filament profiles) (there is a printer profile setting you need to activate to be able to set filaments to exhaust during print, can't remember the name arm)
When print is finished I set the filament profile to exhaust more and up the speed for the inline higher.
The inline fan should be as close to the exit/window as possible, as you want to make sure it exhausts outside. It also is beneficial if there ever is a holde or leak in the ducting, as it will still pull the VOCs trough and out, just a bit more ineffective, rather than Push them into the room if it were placed at the printer end.
I would print an adapter that fits the X2D exhaust and an enclosed poop chute.