sippyjug104 wrote:
The typical amount of carbon dioxide (CO2) contained in the "fresh" outdoor air is 450 to 500 ppm. NASA gets concerned when the amount of carbon dioxide inside the space shuttle reaches 50,000 ppm.
Please don't waste money on a CO2 measuring device for your home as the indoor air will be near whatever it is outside which you will have little to no control over. Now...CO (carbon monoxide) is far more important because it is a deadly, odorless gas heavier than air.