That we actually have. Our apartment has ventilation (not sure if that is the right word, it replaces the air continuous with fresh air from the outside) and integrated into that system is a carbon monoxide detector.

What is even crazier in my opinion is that you can get poisened by smoke while sleeping as you usually don’t smell smoke during sleep.

I guess I’ll get some of those 20 buck ones, they just need to spot something burning.