Two years ago, I was living in a house which I suspected had terrible air circulation, leading me to buy an Awair Element. It is not cheap - at $299, a small ar

Two years ago, I was living in a house which I suspected had terrible air circulation, leading me to buy an Awair Element. It is not cheap - at $299, a small army of RasPi hoarders will dislocate their jaws, barking with with rage - but I genuinely love it. https://www.getawair.com/products/element https://www.getawair.com/products/element The immediate impact was that I became super nerdy about air quality, specifically CO2. It was indeed super high in that house; opening the window helped, but it led to me moving to a place with much better air quality in general. Nature in view, lots of green plants, and an HRV system. I can get <600ppm with the windows closed. TL;DR: if you ponder complex things for a living, you owe it to yourself to get nerdy about CO2 in your sleep and workspaces.