where should a carbon monoxide detector be located in regards to height of the room.?

carbon monoxide detectors high or low image

limorex

low to the floor or higher like a fire detector?

Answer
Monoxide doesn't pool at floor level. I think it is heavier than air, but only very slightly. Most detectors are so sensitive now, it will pick it up at floor or ceiling level long before it reaches dangerous levels in the room.

Is there a reasonable way to monitor oxygen levels in a room?

Circle C

I have a bedroom in a basement with no windows, no active air circulation, and I even try to keep all the cracks closed up to keep the warm air inside. But I worry that with no air circulation I might be breathing more oxygen than gets replenished. Is there a method or cheap instrument I can use to keep my eye on the oxygen levels in this room?

Answer
I don't think there is any real danger with sleeping in a basement. Really, there isn't a way to deplete the oxygen to the point where it would be a problem because there is always some circulation. What I think may be a problem is that toxic substances (such as carbon monoxide) may accumulate because there is no way for them to escape. I would just have like a carbon monoxide detector there.
And if you're not an animal lover, you can use a canary to warn you of danger. Because it has a much higher respiration rate, if there is something toxic or if the oxygen levels drop too low, it will die long before you do so you can get out. Miners used to use this trick to detect gas leaks.

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