Updated: Jul 8, 2021
As of February 2022 in Scotland, the new standard requires:
one smoke alarm installed in the room most frequently used for general daytime living purposes
one smoke alarm in every circulation space on each storey, such as hallways and landings
one heat alarm installed in every kitchen
All alarms should be ceiling mounted and interlinked.
Where there is a carbon-fuelled appliance (such as boilers, fires (including open fires) and heaters) or a flue, a carbon monoxide detector is also required which does not need to be linked to the fire alarms.