I’ve quickly skimmed 3 articles on the subject just now, and the consensus is it just mixes evenly with air. It’ll naturally be more concentrated near the source, but there’s tons of air flow in a house especially when the heat is on. One article even said CO is lighter than air (bit not enough to separate and rise on its own).
I was a little skeptical and just looked at NFPA codes (USA) and they don’t seem to care about placement elevation, only type of rooms and heating sources. I didn’t read all 68 pages, only what seemed relevant, so maybe I missed some discussion.
I’ve quickly skimmed 3 articles on the subject just now, and the consensus is it just mixes evenly with air. It’ll naturally be more concentrated near the source, but there’s tons of air flow in a house especially when the heat is on. One article even said CO is lighter than air (bit not enough to separate and rise on its own).
I was a little skeptical and just looked at NFPA codes (USA) and they don’t seem to care about placement elevation, only type of rooms and heating sources. I didn’t read all 68 pages, only what seemed relevant, so maybe I missed some discussion.