Exhaust Attachment / Back Vent Adapter 4" and 6"

Upgrade your Bambu P1S or X1C with a safe, reliable way to connect to a negative pressure exhaust system. Perfect for hobbyists and small businesses running printers in shared spaces.

Why you need this:
3D printing (FDM and SLA) produces odors, VOCs, and microparticles. Even enclosed printers with filters still release emissions back into your room. A negative pressure exhaust is the most effective solution—safely venting air outside so you can print ABS, ASA, PETG, PLA, and even resin. This is especially important when working with abrasive or engineered filaments such as carbon-fiber (CF) or glass-fiber (GF) infused materials, which can release additional harmful particles and gases.

How it works:
This adapter lets you connect your P1S/X1C to any standard 4” or 6” exhaust system (such as AC Infinity CLOUDLINE fans). Strong magnets and metal pins keep the adapter securely in place and maintain a tight seal. Works with stock printers as well as setups using AMS or AMS Hub.

Recommended systems & accessories:

• Magnets https://a.co/d/hH86TIK
• Pins https://www.mcmaster.com/nav/enter.asp?partnum=98380A104 
• AC Infinity CLOUDLINE S6 – Great for multiple printers. Add a filter if required for local regulations or to prevent backdraft.
• AC Infinity CLOUDLINE S4 – Perfect single-printer solution.
• AC Infinity Window Duct Kit – Universal vent port for 4” and 6” hoses, works with most windows.

Important notes:
* Use at your own risk. This is a DIY solution.
* Contains magnets and small parts – keep out of reach of children.
* You may need to adjust cooling profiles depending on fan strength and ambient temperature. It may not work for large models and filaments that are sensitive to the chamber temperature.

⚠️ Warning: At high speeds (e.g. S6 fan on full), negative pressure may overspin the internal Bambu exhaust fan and generate current that could damage the circuit board. For safety and quieter operation, I recommend physically disabling the printer’s exhaust fan (slicer settings are not enough). External exhaust is required for proper operation.