Could you please anybody elaborate what is the difference between the shut-off device control requirement and speace control device requirement mentioned in the Ashrae standard lighting mandatory portion 9.4.
LEEDuser Basic Member
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Energy Engineer
CLEAResult Consulting
LEEDuser Basic Member
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Ramesh,
As I understand 90.1, the shut off control device is to ensure that lights are off when the building is unoccupied, in other words, it shuts off the lights in the evening. It does NOT refer to occupancy sensors.
The mandatory space control device in 90.1-2004 is simply a switch, though 90.1-2007 requires occupancy sensors in some spaces. See the standard for more details on that.
Paul