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Grade D in Communal Area


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It's a part 6 system that serves no purpose other to draw people into a smoke filled stair, usually these are either withdrawn or replaced with a compliant full evacuate system (i.e. sounders and detectors in flat lobbies) depending on the results of the FRA.

You can't build a compliant Part 1 system using Grade D equipment so it can't be categorised as such.

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