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

I installed it and it read 1050ppm CO2. That makes sense since I've been tired lately and have a headache. The house is too sealed and we have forced air central conditioning. I opened the windows and aired the house. It took a while but now it's down to 837. Everyone should probably see how healthy the air inside is. CO2 is toxic in high concentrations.