The systems capture daylight at roof level and direct it into the rooms below.
In converting the previously unused interior space to additional day-car rooms, Nuffield Hospital North London, wanted to supply them with natural light and give patients the capability of controlling lighting levels using a remote controller.
Each room is served by a 530 mm 21-C daylighting system, and the amount of light allowed into the room is controlled by a variable-position butterfly baffle that fits into the tube and is controlled by a low-voltage pressure switch.
A transition box connects the circular tubes to a 600 mm-square diffuser to fit neatly into a commercial suspended-ceiling grid.
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