I used an earlier version of this one that was a bit cheaper.
https://uk.getawair.com/products/elementIt did have a low pitching noise that I hated, so I didn’t have it connected all the time. But it was very valuable to see how quickly CO2 increased in my small office room, so I started
opening the windows a lot more often after that.
High CO2 leads to lower concentration and other things. By measuring it you can see if you need to add more plants or
open windows more often. We bought it mostly to measure VOC.
Post Edited (Deep_sleep) : 1/16/2022 5:40:10 AM (GMT-7)