Cool! How long did the project take, would you say?

BTW 82% indoor humidity is really high; usually over 60% humidity and you risk mold and mildew growth in localized moisture hotspots. Mold is terrible for air quality since the spores are biologically active, so they effect you more than just the raw PM2.5 numbers suggest. You may benefit greatly from adding a dehumidifier (placed in 'that room' or basement that's dank/musty), even if it only runs in wetter seasons.

You probably already discovered this, but cool mist/warm mist/ultrasonic humidifiers are extremely bad, effectively being purpose-built air pollution generators. I strongly recommend investing in a larger evaporative pad humidifier instead. See Tech Connections video.

For general AQI advice, it's hard to beat just adding an Airfanta 3Pro every 300 square feet with at least one per room (excluding bathrooms). Designed by an engineer, it has the best dollar-to-perf and noise-to-perf ratio of any air purifier thanks to using PC fans and balanced E11 filters[0][1]. The main downside is that some people think it looks nerdy, lol

For a sleek finished look, you could always mount the ePaper display behind a decorative photo frame of your choice, and fit the matte (the white area around the photo) to the screen size. It's roughly 2.5"x4.5", so a 4x6 frame which mattes to 3x5 should work. A local photo studio should do the custom matte cutting at a very reasonable cost, and (considering the supplies and practice needed) it's probably the best option for a one-off project.[2]

Cheers and thanks for sharing

[0] https://x.com/Engineer_Wong/status/1899144721710408038

[1] https://x.com/Engineer_Wong/status/2056588878564442334

[2] https://www.reddit.com/r/photography/comments/2ir1tu/matting...

So I have a weatherman, which also tells me the news