Canairi makes an indoor monitor for fresher air.
In their own words
Birdie is a Fresh Air Monitor improving your indoor climate & health. When the air quality is poor Birdie will drop down, until you open the window to bring it back to life. Simple as that.
90% of our life is spend indoors. Often in poor air quality increasing the risk of asthma, headache, fatigue and sleep disorders. Airing out regularly will improve your well-being, sleep and overall health. Birdie is a friendly reminder to a healthy indoor climate.
In the early 1900s, mine workers used to detect toxic air in the coal mines. When the bird fainted, it was time to get out of the mine. With a built-in CO₂-sensor, Birdie works exactly the same way - but in your home, office or classroom.