My CO2 levels go above 1000 ppm which means people will start getting sick, right?
Wrong. The 1000 ppm level is not a health exposure limit. There are no documented adverse health effects to exposure to CO2 levels under 5000 ppm. The 1000 ppm indoor maximum level has been recommended by ASHRAE for indoor office spaces to provide ventilation for acceptable indoor air quality (comfort as opposed to health). In a like manner, CO2 levels below 1000 ppm may not accurately indicate acceptable indoor air quality if contaminants are present in the space which may adversely affect occupants.
