Refillable Carbon Filter - Air Scrubber

Refillable Carbon Filter Housing – Modular DIY Air Filter - Air Scrubber 

I designed this 3D printable refillable carbon filter as a modular DIY alternative to commercial inline carbon filters.

The goal was to create a reusable filter housing that makers can fill with activated carbon or other filter media, instead of having to replace the whole filter each time. This can be useful for workshop air filtration, resin printing spaces, enclosures, and other custom ventilation projects.

This design includes multiple adapter parts to support different fan sizes, so you can better match it to your own setup. If you need another adapter size that is not included, feel free to reach out and I may be able to design one.

This project is meant for people who enjoy building and customizing their own equipment, while keeping replacement costs lower over time.
You can fit just about 4Lbs of activated carbon inside.  
 

Features

• Refillable carbon filter housing
• Modular design with multiple fan adapters
• Reusable body for easy media replacement
• 3D printable DIY solution
• Suitable for custom air filtration setups

Important

• This listing is for the STL files only
• Activated carbon, fan, hardware, and other accessories are not included
• Filtration performance will depend on print quality, sealing, media used, packing density, and airflow
• This is a DIY project and should be used at your own discretion

If you print one, I’d love to see your build and hear what setup you used.

Here’s an even more casual MakerWorld version if you want something a bit friendlier:

DIY Refillable Carbon Filter with Multiple Fan Adapters

I made this refillable carbon filter for makers who want a reusable and customizable air filtration solution.

Instead of replacing a full filter, this design lets you swap out the carbon media and keep using the same housing. It’s a practical option for DIY ventilation projects, resin printing setups, workshops, and other spaces where you want more control over your filtration system.

I included multiple parts for different fan sizes so the design can work with a wider range of setups. If you need an adapter for another fan size, feel free to message me and I may be able to add it.

What’s included

• STL files for the carbon filter housing
• Multiple adapter options for different fan sizes

Not included

• Carbon media
• Fan
• Hardware

As with any DIY filtration project, results will depend on how well the parts are printed and sealed, as well as the media and airflow used.