Motivation to Design:

3D printing, both FDM and resin, generates lots of fumes that are probably bad to be around for a long period of time. I tend to work next to my workspace for long periods of time, and wanted a solution to these fumes. My first attempt did not pass air quality inspection, so I decided to try again with a bigger HEPA filter. This sits inside of a collapsible printing enclosure, turning it into a pseudo-fume hood that allows me to work near my 3D printers without getting sick.

Design Goals:

1. Attach over the outlet of the existing HEPA filter.

2. Attach to barbed tube interface to route the exhaust out of the box.

3. Provide access to the user controls.

4. Chemical compatibility, but this isn’t a huge issue for common printable materials.

Relevant Interfaces:

1. The top hole needs tapping to attach to a 1” NPT barbed fitting, but air flows out the top of the filter and through the tubing.

2. The five bottom prongs friction fit into the pattern on top of the filter, providing a stable and secure-enough connection to route air out of the filter.

3. The hole lofted out of the center provides passable access to the user controls on top of the filter.