Summary

The intention was to have a quiet sensor array in all the rooms to track the performance of the house's environment over the internal interwebs.
The sensors (BME680 and RTC) go up in the hump on the top. They float around there, as mounting gets fiddly.
Run the fans off the 3.3V and not the USB rail as they can be a bit noisy at 5V. Or you can leave out the fan and adjust for the warming of the interior in the code.

Code:

https://github.com/xsk8rat/DualFeatherDisplay/tree/main