Sitting in an increasingly concentrated puddle of my own CO₂ when I close the door of my small home office is not a life safety issue. It just seems to affect m

Sitting in an increasingly concentrated puddle of my own CO₂ when I close the door of my small home office is not a life safety issue. It just seems to affect my cognitive performance at some point. If there were CO₂ tanks or combustion in play, I'd be using a proper industrial CO₂ alarm.