Vento Air-Filter for Bambu Lab H2 printers

IMPORTANT

• Please read the PRINTING & INSTALLATION Guide below before starting the project. 
• I recommend using PETG for this project. PLA is not advisable, as the exhausted warm air can cause the vento to soften.
• You can order the HEPA + Carbon filter on the Voxelpla website.
• I do my best to double-check and test the print profile I create. They are up to date with whatever changes I made to the designs. If you are using profiles created by others, please verify that they are up to date.

350 hours printing PLA and PETG

VENDORS 

INTRODUCTION

Currently, my go-to printers are the BambuLab H2D and H2S, and I frequently use them with PET-G and PLA filaments. While these machines are among the best pro-consumer printers available, I had noticed that during low-temperature printing, both the top vent and switch flap open, bypassing the internal filter and allowing unfiltered air to exhaust.

To address this, I designed vento - a HEPA + Activated Carbon filtration system for the BambuLab H2 series printers. My goal was to create a system that: 

• effective in capturing emissions,
• intuitive approach to print, install and use,
• users can print the parts on their Bambu printers, 
• a fast and simple weekend project.

In summary, vento adds an extra layer of ventilation that will improve the working environment and ultimately enhance the quality of life for users and their loved ones.

DESIGN APPROACH

The design approach for vento focused on usability and accessibility. The core consideration was to make it intuitive, easy to install, and simple to use. Bambu H2 printers are large and heavy, and not everyone has full access to the back of the machine when it is placed on a workbench or shelf positioned against a wall.

To address this, I designed a magnetic slide-lock system that allows users to reach the back of the printer and slide the filter bracket out easily when changing the filter. I also included a bracket for the BambuLab Smoke Ventilation Pipe Adapter, making it easy to remove for maintenance. These design choices ensure that vento remains practical and user-friendly without compromising functionality.

Another primary challenge was balancing airflow resistance and thermal management—ensuring that exhaust air is filtered without causing chamber temperatures to rise beyond the softening point of the filament, which would force the H2 to heavily ramp up the exhaust fan speed. I was unable to find a HEPA + carbon filter of the required size and performance on the market, so I collaborated with Voxelpla to manufacture a custom filter for this application. 

Voxelpla and I strongly believe that vento is an essential tool for the H2 series printers and agreed to keep both vento and the HEPA + carbon filter affordable and accessible for the community.  Currently, the filter is available in the US through Voxelpla, with plans to extend vento availability to other regions. You can order the HEPA + carbon filter for vento on the Voxelpla website.

BILL OF MATERIALS

Hardware: vento HEPA + activated carbon filter - 1pcs  D6 x 3mm magnets - 8pcs BT3 x 10mm self-threading screws - 4pcs 10mm wide x 2mm thick EVA foam tape.
Tools: rubber mallet scissors M3 allen key  3mm drill bit (optional)  box cutter (optional) magnet polarity tool (optional)

PRINTING GUDE

I recommend using PETG for this project. PLA is not advisable, as the exhausted warm air can cause PLA printed parts to soften. During prototype and final testing, I used BambuLab PETG-HF and VoxelPETG+. If you want to order BambuLab filaments, please consider using Modbot's afflink to support his YouTube channel. For VoxelPETG+, you can use my afflink

There are four build plates in total. Only plates 1 and 2 are required. Plates 3 & 4 are optional.  Plate 3: Use if printing in a single color. Plate 4: Use if an adapter for the BambuLab smoke ventilation duct is needed.

INSTALLATION GUIDE

Insert D6×3 mm magnets into the four slots of the base bracket. They will snap into place without the need for glue. Ensure that all magnets are oriented with the same polarity.  A magnet polarity tool is recommended. If unavailable, mark the same polarity faces with a sharpie to prevent mistakes.

The base and filter brackets are designed to attract when slid together. Mark the polarity of the remaining magnets before continuing. A magnet polarity tool is recommended, install four magnets into the filter bracket. Slide the filter bracket into the base bracket several times to confirm there are no obstructions. The motion should be smooth.

The HEPA + carbon filter should fit snugly into the filter bracket. Apply 10 mm × 2 mm EVA foam tape to the base bracket and trim off any excess material. Using a 3 mm drill bit or an allen key, open the holes for the mounting screws.

Use BT3 × 10 mm self-threading screws to fasten the base bracket to the printer. Do not over-tighten, as these screws cut directly into plastic. Enable cooling on the printer to check that there is clearance between the air vents and vento bracket.   Slide the filter bracket in and out several times to ensure smooth movement. The filter bracket includes a loop hole for attaching a string or paracord to assist in removal.

FILTER CHANGE REQUIREMENTS

It is advisable to replace the filter after 500-600 hours of print time. This prevents dirt buildup that could obstruct air exhaust from the H2 printers. You can order the HEPA + Carbon filter for vento on the Voxelpla website. 

CONCLUSION

To date, my designs are free to download for personal use. There is No Patreon, No Membership, No Clubs, No Subs and No OnlyFan (hahaha). If you like my designs and wish to contribute to my coffee addiction and help fund the filaments/materials needed for prototyping, doing any one of the below will be greatly appreciated:

1. Post your make in the comments section and on other 3D printing social media sites,
2. A MakerWorld's boost,
3. Use the afflink above to purchase filaments. 
4. Buy me a coffee at Ko-fi or paypal.me