Does anyone know of a standalone CO detector, z wave or WiFi which integrates with ST?
I know that there are combo detectors but that actually makes no sense
CO is heavier than air so that detector needs to be close to floor level while smoke rises so the smoke detector needs to be close to the ceiling.
If you wait for the CO to get to the ceiling it’s too late and the same applies to smoke in that if you have to wait for the smoke to get to ground level you’re out of luck.
Could try Vesternet, they list some but I cant vouch for how they integrate with ST/Home Monitor:
They have good returns policy if you need to return though…
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Actually CO is slightly lighter than air and if it is heated it is even lighter. So the ceiling is a good place for a CO detector.
"Carbon monoxide (CO) is slightly less dense than air, meaning it will rise in the air because it is lighter than the surrounding air; the density of CO is approximately 1.14 kg/m³ while the density of air is around 1.29 kg/m³.
Key points:
CO is lighter than air:
This is why carbon monoxide tends to float upwards when released into the atmosphere.
Density comparison:
Carbon monoxide has a density of around 1.14 kg/m³, while air has a density of around 1.29 kg/m³.
Practical implication:
Due to its lower density, carbon monoxide detectors are typically placed on walls at a mid-level height to effectively detect its presence."
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OP may be thinking of Carbon Dioxide CO2 which is heavier than air.
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I think you’re right about it rising but if you check, according to the EPA, CO detectors should not be installed on a ceiling so the combo ones still don’t make the best sense unless you’re going to install the smoke detector at chest height. My home has hard wired smokes so I was looking for a stand alone CO sensor.
I’m paranoid about this since my sister & her husband got CO poisoning from a faulty furnace.
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The above study suggests that you can place detectors at any height.
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In the UK we typically get advised to have a CO detector in each room that has a fuel burning appliance in it, and to have it at least 1m away from it and ‘high’ in the room.
Other advice I’ve seen includes: no more than 3m away from the appliance; at least as high as the appliance; at least 30cm from the wall if ceiling mounted and 15cm from the ceiling if wall mounted (that’s what they say for smoke detectors too); unobstructed by furniture or anything that hinders the free circulation of gases; above door height; and away from exit doors and extractors. There are probably other variations.
One well regarded organisation notes a correlation between the detector instructions suggesting not to install the device in a kitchen and the detector failing their tests. The kitchen is a common location for boilers in the UK and so is quite likely to be the one place you definitely do want one.
None of which in any way affects @Dr_Mom’s requirements.
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I use the Fibaro CO Sensor (Zwave).
It shows as a smoke sensor within the HomeMonitor App.
Battery tend to drain bit too fast, but otherwise its reliable regarding the connection.
Havent had any real CO issue though and therefor I am technically not sure if it measures fast and correct…
Look out, as there are two versions (Zwave & Apple Homekit) looking exactly the same.
