Hello,
there are also systems on the market which measure the daylight amount at a central weather station on the roof of the building and then calculate the shadow and control each lamp with a software for each of the rooms of the building.
The credit says to install "controls in all regularly occupied daylit spaces within 15 feet of windows and under skylights." As the sensor of this central solution is naturally not within 15 feet of windows I am not sure if this technology can be used for LEED certification.
Has anyone respective experiences?
Thanks in advance!
You rely on LEEDuser. Can we rely on you?
LEEDuser is supported by our premium members, not by advertisers.
Go premium for
Emily Catacchio
Sustainability SpecialistWight and Company
610 thumbs up
April 5, 2012 - 3:58 pm
The intent of this credit is to allow occupants control over their lighting. Since the sensors on the roof are not occupant controlled they would not comply with this credit. A light switch, a dimmer, a dual switch, etc. all comply.
Dane Sanders
PrincipalClanton Associates
68 thumbs up
April 5, 2012 - 9:23 pm
Hi Marco,
While I believe the intent of the first point of this credit is to provide daylight control for the luminaries within 15' of the windows using any properly commissioned control system, my experience with this credit's interpretation by GBCI has been that the sensor must be located within 15' of the windows. There are many cases that you may actually need to locate a sensor further from the windows for proper operation and commissioning of the control system, but I was not successful in making this argument to GBCI.
LEED aside, the issue with global roof mounted sensors that rely on algorithms for dimming is that they cannot account for manual window shades being lowered or other changes in the space.
Thanks for your question.