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www.jaymarinspect.com/carbon-monoxide-detector.html

Is carbon monoxide lighter or heavier than air? Of course, any time you have gas appliances or a wood-burning fireplace, you should have at least one carbon monoxide (CO) detector in the home. CO is odorless, tasteless and does DOES NOT GIVE WARNING that it is being produced or building up. And, is it lighter or heavier than air?

www.carbonmonoxidedetectorhq.com/carbon-monoxide-heavier-than-air

1. Is carbon monoxide heavier than air? Carbon monoxide has a density that is about 97% that of air under normal room temperature. So, to answer the question, no, it is lighter than air. You would think, then, that it would rise. In real-world conditions, there are a lot of forces that cause the CO to mix rather completely into the air.

healthybuildingscience.com/2013/02/22/carbon-monoxide-facts

Carbon monoxide is heavier than air, so CO detectors should not be placed on the ceiling or high on the wall. Fact. CO is slightly lighter than air. However, studies have shown no significant difference in measurements based on what height CO detectors are mounted. Different manufacturers recommend different mounting locations, and you should ...

en.wikipedia.org/wiki/Talk:Carbon_monoxide_detector

I made the suggestion about not needing them on the ceiling into a stern warning. If you install them on the ceiling (unless they're specifically designed for it - most aren't) it could be deadly. = incorrect Carbon monoxide is not heavier than air - in fact it is slightly lighter as CO has the RMM of 28 whereas air is slightly more than this.

www.quora.com/Why-is-carbon-monoxide-heavier-than-air

The density of pure carbon monoxide is 96.7% that of dry air. At 45 °C (113 °F), air with 100% relative humidity has only 96.5% of the density of dry air; carbon monoxide is barely heavier than that air. At 60 °C (140 °F), air with 100% relative humidity has only 92.7% of the density of dry air; carbon monoxide is a bit heavier than that air.

answers.yahoo.com/question/index?qid=20061117111827AAxEIRW

Best Answer: Air is a mixture (not combination of basically 2 gases: oxigen (O2)and nitrogen (N) in its molecular form. Carbon monoxide (CO) is a molecule made of 1 carbon atom (6) + 1 oxygen atom (8) = 14. Therefore, CO is heavier than N, which molecular weight is just 7, but slightly lighter than the O2 molecule, that wheighs 16.

nest.com/support/article/Shouldn-t-a-carbon-monoxide-CO...

Why carbon monoxide (CO) alarms don’t need to be installed near the floor. Carbon monoxide (CO) is slightly lighter than air, so carbon monoxide alarms are effective when placed on the ceiling or high up on a wall.

www.firstalert.com/FAQ/carbon-monoxide-co-alarms/other/is...

Carbon monoxide is not heavier than air. The diffusion of carbon monoxide in air is relatively even, meaning that a source of carbon monoxide can distribute the gas evenly throughout the room and house. When installing a carbon monoxide alarm, choose a location where the alarm will stay clean, and out of the way of children or pets.

en.wikipedia.org/wiki/Carbon_monoxide

Carbon monoxide (CO) is a colorless, odorless, and tasteless gas that is slightly less dense than air.It is toxic to animals that use hemoglobin as an oxygen carrier (both invertebrate and vertebrate) when encountered in concentrations above about 35 ppm, although it is also produced in normal animal metabolism in low quantities, and is thought to have some normal biological functions.

freshairguru.com/is-carbon-monoxide-heavier-or-lighter...

The placement of a carbon monoxide alarm depends on how heavy carbon monoxide is compared to the air around it. If it is heavier than air, it will stay closer to the ground. If it is lighter than air, it will rise to the ceiling before filling the entire room.