2

Given the levels you're describing, I'd stay inside, but it's a close call. Pulling up a random Carbon Dioxide Safety Data Sheet, the long-term exposure limit for carbon dioxide is 5000 parts per million according to NIOSH, ACGIA, and the latest OSHA standards (OSHA 1989 permitted 10,000 ppm). The 3600 ppm your meter is reporting is below that, while the ...


2

Some negative ion generators also produce small amounts of ozone, which is a gas that can be lethal if inhaled in concentration. I suppose if you were to find a way to accumulate enough ozone and then intentionally inhaled it you might die. There is no chance of this happening in normal use however, though you can smell a trace of ozone emanating from these ...


Only top voted, non community-wiki answers of a minimum length are eligible