It is certainly possible to buy carbon monoxide alarms that are designed to be installed on a ceiling. The Aico Ei3018 is one example. When mounted on a ceiling it should be at least 300mm from any wall or light fitting. If mounted on a sloping ceiling it should be at the high end of the room but at least 300mm from the apex.
Wall mounted detectors should be at least 150mm from the ceiling.
The idea is to avoid mounting the detector in areas where the air doesn't move much.
To quote from the page that you linked to: If the alarm is located on the ceiling:
It should be at least 300 mm from any wall and any ceiling obstruction e.g. light fittings.
So you have identified another one that CAN be installed on a ceiling.
Yes, and have done for some time. Have you already bought one? If so read the instructions to see if it can be ceiling mounted. If not, you have lots of choice if you want to ceiling mount one.
If you need to find a tradesperson to get your job done, please try our local search below,
or if you are doing it yourself you can find suppliers local to you.
Select the supplier or trade you require, enter your location to begin your search.
Please select a service and enter a location to continue...
Are you a trade or supplier? You can create your listing free at DIYnot Local