Heat and Smoke detectors - why both in flat lobby

[Guest Jonathan Mac]

Hi

Can anyone shed light on why LaCORS advises both a heat and smoke detector in the lobby of a flat opening on to the escape route? If the smoke alarm goes off isn't this sufficient to alert the other flats by interlinking instead of the heat detector which will go off at a higher temperature?

I'm looking at bottom page 25-26 of the guide.

Many thanks

[Tom Sutton]

The grade D smoke alarm in the hall is to warn the occupants of the flat only, for instance burning toast and other false alarms, will only warn the occupants of the flat, and not warn the rest of the building to evacuate.

The heat detector is connected to the grade A fire alarm, covering the common areas. If there was a fire in the flat and the occupants of the flat evacuated the building without warning the rest of the building or if the flat was empty, the rest of the building would be warned, it prevents the building being evacuated unnecessarily.