[embee]

Have you got the most appropriate type in the right place?

Near kitchens and bathrooms it is recommended to use optical types which are less prone to false alarms from cooking and steam than the ionisation types, which are recommended for sitting rooms and bedrooms. Kitchens, lofts and garages usually should use heat detectors.

There are wireless interlinked units available now, and also types which simply replace the ceiling rose for a room light, don't have any experience of them though.