A neighbour bought a detector and asked me to fit it. As her Combi is in an upstairs airing cupboard, I fitted the detector in the cupboard (the door isn't especially soundproof) Would you agree with this - or would you take the view that it should be in a habitated area - such as in the hallway.
Interesting. Density of CO is nominally the same as air.
I guess the correct place is where it visible and a habitable area, close to the potential source of CO.
I also believe that a full airing cupboard may have limited airflow, so it would be impossible to second guess the position of highest concentration.
Aren't there rules about placing combustible materials in the same enclosed space? Don't such enclosed spaces with boilers need fireproof doors? I recall a tale where a door was removed to satisfy regulations! (And promptly put back!)
The destructions on one I bought recently stated it should be mounted, not closer than 2 metres and not further than 4 metres, from the probable source of CO.
What I have done is looked at where the sources of CO could be and which areas of the house are frequently habitated.
I then bought 4 interconnectable CO detectors.
one went by the combi boiler in kitchen which vents outside via a horizontal flue.
another went by the wood burner which also happens to be the lounge and there is a chimney stack for the wood burner.
Another went in the master bedroom (Which happens to be above the lounge) simply because we sleep in there AND there is a chminey stack by the bed where said fumes from wood burner pass through.
the last one went in the loft near the wall where the chimney stack continues up. This is in case the chimnet stack ever leaks into the loft.
The lot is all interconnected and there is also a connection into the house alarm panel via a spare 24 hour zone.
Snip NO! -CO is a bit more than half the density of air. Town gas was largely CO and was sometimes used to fill balloons although the 'lifting power' was less than hydrogen. Hence a good idea to locate a CO detector high up.
Oops! I should have checked before posting! When I looked it up I was surprised to see that hydrogen was such a large component of coal gas; well I've learnt something.
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