Short single-speaker YouTube advisory (by Derek Cole) recommending that homes with any gas appliance should have a carbon monoxide (CO) detector. The speaker notes many homes use combination smoke/CO alarms but argues CO is heavier than air and recommends placing CO detectors low on the wall near floor-level outlets for effective detection; ceiling-mounted units are suitable for smoke but not CO.
If you have a gas appliance in the home at all, stove, furnace, anything in the home running off of gas, you should have a carbon monoxide detector in the home. A lot of clients we go to have a combination smoke and carbon monoxide detector in the house. The problem is with the CO part of it, or the carbon monoxide part is that when it's up high on the ceiling, it's not doing you any good whatsoever because carbon monoxide is heavy. So the best thing to do is put it on floor level with the outlets on the floor on the wall. That is where it needs to go. If it's up up there, high in the ceiling, on top of the wall, it's good for a smoke alarm, but it's not good for a co. Al.
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