You need something similar to this.
http://www.amazon.co....eativeASIN=B000WH2S9C
Amazon clearly sell them but you can also get from some DIY sheds. Many of the CO alarms are now combined with a smoke alarm - as with the example from Amazon.
It needs to be mounted on the ceiling - not plugged into the wall - because carbon monoxide is lighter than air so rises.
As usual, good advice from buildersmate. Just like to add a relevant point.
Ensure that your sister has her appliances inspected / serviced once a year by a suitably qualified engineer ( Gas safe registered ).
If your sister's property is rented, this responsibility ( as a legal requirement ) falls on the landlord.
Hope this helps.
were the deaths caused by carbon monoxide from a faulty flue or by asphyxiation or poisoning from escaping gas? You might need two different detectors if the carbon monoxide detector doesn't detect gas, either bottled or from the main.
These young men died in a relatively modern building. The authorities have issued a warning naming one particular shop-contractor and stating people should not use any appliance they installed until they have it checked out by a qualified gas-fitter.
Should a carbon monoxide alarm be fitted low down, unlike a smoke alarm, as it's a heavier than air gas?
Hmm - interesting point about the density, Sandy. It seems the jury is out, because the density is so close to that of air. However detectors ARE always put on the ceiling.
http://askville.amazo...do?requestId=17227895
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Natural Gas has a smell added so can be detected easily in small quantities.
CO is odourless.
Two different detectiors available.
Make sure you have a CO detector/alarm!