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How much controllability do I need for my multi-occupant space?

I included occupancy sensors to meet the controls requirement but my LEED reviewer indicated that they weren’t sufficient. Why is this?

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NC-2009 IEQc6.1:Controllability of Systems—Lighting

Open Office Space Requirements

I am confused about multi-occupancy lighting requirements for arena office spaces. This is a research lab project on a university campus. It contains an open office area with 14 seats which are used intermittently as a support space for visiting researchers and students. It is supplied with wall switch and 2-zone occupancy sensors. The primary work area for staff, researchers, and students is in two separate lab specific rooms. These 14 seat designated work areas provide individual task lighting at each seat in addition to wall switch and occupancy sensor. Given the flexibility of the space, does the arena office area meet the lighting control requirements for IEQc6.1 multi-occupancy space? Thanks so much.

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Wed, 07/11/2012 - 01:16

Hi Sherri, You've hit on a question that has come up again and again. The language of the credit does not get into frequency of use so, despite the fact that the 14 arena office space seats are used intermittently, to me they seem to be still functioning as workstations. Therefore, they would need to count within your 90% controllability and not as a multi-occupant space. It doesn't appear to me that your open office area currently complies. Please note also that occupancy sensors cannot contribute toward controllability unless they have manual override capability. The second area you describe as the primary work area for staff does seem to comply with the credit requirements. Hope this helps a bit. Lauren

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