How to choose
Choose alarm type, power and interconnection around the room, property and current nation-specific requirements.
Quick answer
Start with the room and the property’s current alarm plan. Optical smoke, heat, battery, mains and interconnected alarms solve different parts of the system; installation and legal requirements differ by nation and tenure.
Scope: Choose the alarm system around nation, tenure, building work, room, power and interlink requirements. Mains wiring or system alterations need a competent installation route, and this guide cannot declare a property compliant.
Four options to compare
Best for: A location where the current plan calls for smoke detection and a battery format is appropriate.
Main trade-off: Battery life, replacement date and lack of interconnection may limit the system.
Must check: Room suitability, sealed/replaceable battery, test method and end-of-life date.
Best for: A kitchen or other location where the current plan calls for heat rather than smoke detection.
Main trade-off: A heat alarm is not a substitute for smoke alarms elsewhere.
Must check: System layout, siting and exact interconnection compatibility.
Best for: Homes where one alarm should trigger the others and the chosen system supports it.
Main trade-off: Wired and radio systems are not universally compatible across models or generations.
Must check: Exact interlink protocol, power backup, installer route and replacement horizon.
Best for: Rental, conversion, extension, larger home, accessibility need or uncertain current compliance.
Main trade-off: Requires a property-specific assessment rather than a generic four-product list.
Must check: Nation, tenure, building work, current system and competent installation requirements.
Map rooms, storeys, escape routes, existing alarms, power and occupants. Then check current requirements for the relevant UK nation and tenure.
A certified product can still be the wrong type, badly sited, incompatible or overdue for replacement. UK Shortlists does not declare a property compliant.
What this guide cannot check
Do not claim universal safety, guaranteed suitability, professional approval or permission to undertake protected work. Check current instructions, exact identifiers and local circumstances before acting.