I had no idea CO2 could mess with mood like that, makes sense though. Definitely something I need to try out. Thanks for sharing, and nice project btw!
This is my attempt to fix groggy mornings by lowering my bedroom CO2 from 1700 ppm to ~900 ppm.
I designed a simple, 3D-printed fan duct that directs air under the door to improve air circulation.
A note on the design process: I used CadQuery, a Python library for creating parametric 3D models. I didn't know tools like this existed and highly recommend it if you can program; it turned out to be more convenient than manually iterating on prototypes in a GUI.
The project is open source and the post explains the full build. Happy to answer any questions.