I come from a remote environmental instrumentation background and it's pretty amazing where the technology has gone. I've built two of the airgradient kits, tested various relatively inexpensive sensors and compared them to professional grade sensors. While this stuff is not even close to research grade it's a fraction of the cost, $35 for NDIR CO2? Crazy to me. You could setup a few of these sensors inexpensively, do an in-situ calibration (your house, backyard, whatever), model the response and apply a correction factor to give you some pretty good results.
For homes good enough is fine so it's really cool to see these devices become more available. You'll have fun with the kit, it's super easy to use and really easy to integrate.
For homes good enough is fine so it's really cool to see these devices become more available. You'll have fun with the kit, it's super easy to use and really easy to integrate.