Americans spend about 90% of their time indoors, where the air can be 5 to 10 times more polluted than the worst outdoor air. Bad indoor air, including high levels of CO2, has been linked with fatigue, headaches, and even respiratory diseases, all of which could be alleviated by airing out your home. That’s why two designers created Canairi: a minimalist monitor that nudges you to open the window without using blinking lights, warning sounds, or phone notifications. And no, there’s no app; just simple, intuitive design.

https://www.fastcompany.com/90747448/this-bird-shaped-monitor-drops-dead-when-your-indoor-air-is-bad