A pod room comprising: a ceiling system comprising: a smoke detector; and a ceiling panel , wherein the ceiling panel comprises: one or more cover components movable between an open configuration and a closed configuration and wherein the one or more cover components are adapted to acoustically insulate the pod room in the closed configuration, wherein the one or more cover components in the open configuration produce at least a 70% open area, wherein the one or more cover components comprise a plurality of pivotable louvres which are fixed at intervals relative to one another, the louvres being pivotable between contacting positions in which the louvres contact one another to define the closed configuration, and non-contacting positions which define the open configuration; and characterised in that the ceiling panel further comprises an actuation mechanism configured to move the one or more cover components from the closed configuration to the open configuration in response to a power cut; wherein the smoke detector is wired in such a way as to cut power to the actuation mechanism in response to the detection of smoke; and wherein the pod room is configured to cut power to the actuation mechanism if the smoke detector fails or is removed. a smoke detector; and a ceiling panel , wherein the ceiling panel comprises: one or more cover components movable between an open configuration and a closed configuration and wherein the one or more cover components are adapted to acoustically insulate the pod room in the closed configuration, wherein the one or more cover components in the open configuration produce at least a 70% open area, wherein the one or more cover components comprise a plurality of pivotable louvres which are fixed at intervals relative to one another, the louvres being pivotable between contacting positions in which the louvres contact one another to define the closed configuration, and non-contacting positions which define the open configuration; and characterised in that the ceiling panel further comprises an actuation mechanism configured to move the one or more cover components from the closed configuration to the open configuration in response to a power cut; one or more cover components movable between an open configuration and a closed configuration and wherein the one or more cover components are adapted to acoustically insulate the pod room in the closed configuration, wherein the one or more cover components in the open configuration produce at least a 70% open area, wherein the one or more cover components comprise a plurality of pivotable louvres which are fixed at intervals relative to one another, the louvres being pivotable between contacting positions in which the louvres contact one another to define the closed configuration, and non-contacting positions which define the open configuration; and characterised in that the ceiling panel further comprises an actuation mechanism configured to move the one or more cover components from the closed configuration to the open configuration in response to a power cut; wherein the smoke detector is wired in such a way as to cut power to the actuation mechanism in response to the detection of smoke; and wherein the pod room is configured to cut power to the actuation mechanism if the smoke detector fails or is removed. <EOS>