Review on 🌬️ Advanced 3-in-1 Indoor Air Quality Monitor with CO2/RH/Temp Data Logging and Audible Alarm - NDIR Sensor Technology by Patrick Reid

I bought this after reading the latest research that CO2 levels above 900ppm reduce our ability to think by 30% or more, the certainly has an effect on me when I play guitar or video games, although it seems to become more evident with age. My goal was to keep the room at around 600ppm and not spend too much money on heating and air conditioning. It controls a small window fan (very small and very quiet, commonly used to cool computer cases - Noctua 200mm). For more information see this guide: http://www.instructables.com/On-Demand-CO2-Exhaust-Fan/ The device does exactly what I want: - In human mode, the ambient light sensor is ignored, yes we produce CO2 during sleep mode. - With an average of 600ppm and a zone set at 50ppm (minimum allowed) it turns on at 625, off at 575 and on again when it reaches 625. - 15ft sensor cable is great, didn't want it to be near the fan or in its way. Programming took a few minutes, the menu is finicky with a very short wait time, but only needs to be set once. I put it next to my other newly calibrated CO2 meter to test and it was within 10ppm.