This is so fantastic. Trying to figure out where to put one in my house.
Birdie Tells You When It's Time to Open a Window for Fresh Air https://design-milk.com/birdie-tells-you-when-its-time-to-crack-open-a-window-for-fresh-air/?utm_source=rss&utm_medium=rss&utm_campaign=birdie-tells-you-when-its-time-to-crack-open-a-window-for-fresh-air
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@AnnemarieBridy Hm. I just made a little device with an e-ink display, remotely linked to an outdoor sensor to tell us the temperature and humidity. Now I'm thinking of attaching a sensor directly to it to display indoor CO2. And maybe even use a little canary graphic...
@AnnemarieBridy And the ideal sensor is easily obtainable. It even has its own temperature and humidity sensors as well. (Turns out it needs them to in order to produce an accurate CO2 reading, but you can tap them yourself as well.) So there's a couple of nerdy hours I can spend on another side project...