A simple cheap device is available to measure air quality -
A) CO2 = Carbon dioxide, fresh air is 350 to 450 ppm.
1000 to 2000 ppm indicates poor air quality and causes drowsiness.
Current measurement at Hawai'i is 414 ppm.
B) HCHO = Formaldehyde, maximum recommended exposure is 0.100 mg/m3
C) TVOC = Total volatile organic compounds, maximum recommended is 0.250 mg/m3
D) Temperature
E) Humidity
You can see that inside my home the air quality is as good as the outdoor air.
