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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?

In order to help meet IEQc6.1 for my individual occupants I am including task lighting. Does my task lighting need to be hard wired?

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

Lighting control in bedrooms

As per the IEQ Space matrix released in October 2013, bedrooms are described as individual work stations. However under general credit guidance in the same worksheet, one lighting control in each room of the residential unit would suffice. If each bedroom is provided with a table lamp on the work desk, and additionally design accounts for 2 pendant fixtures, 1 on either side of the bed with individual control, will this qualify for the credit? Or alternatively 1 lighting control per bedroom would suffice? As per the comments in other discussions looks like not all reviewers are in favor of 1 control per bedroom?

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Samuel Nation
PE, LEED AP B D + C
DVPE
LEEDuser Basic Member
2 thumbs up

Fri, 01/30/2015 - 14:46

Open Office is classified as individual workstations as well as private offices are individual workstations. In private offices all you need is single control. In open offices, where you have many individual workstations, it would be difficult to give each station a control of lights right over their desks therefore the task light at the station is the best option to give each individual control of their lighting. I would say if you know the space will have more than one station (e.g. dorm room) then you must have more than just the single control. Otherwise. I would contend it is just like a private office and the individual who occupies the room would have control with the single switch.
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Kathryn West
LEED AP BD+C, O+M, Green Globes Professional
JLL
LEEDuser Basic Member
112 thumbs up

Fri, 01/30/2015 - 19:37

Hi Jyothsna, I had this exact same question and emailed LEEDinfo@usgbc.org They emailed me back and said that in multioccupant bedrooms you need the number of task lights to match the number of occupants. If each occupant has their own desk I'd give them a task light at each desk. Don't ask me what to do if there is one shared desk or one shared bed in a king size bedroom for example! I am not positive. I'd guess you still need to follow the guiding principle that you want one task light for each occupant of the residential unit bedroom.In that case it would be nice to provide task lighting on two bedside tables. See my post from January 12th for more detail.

Fri, 01/30/2015 - 21:36

Thank you all for clarifying this. Just wanted to be sure because of the description given under the general credit guidance tab.

Mon, 02/02/2015 - 16:21

Hi Jyothsna and Kathryn, Thanks for the feedback on this issue. We are going to update the IEQ space matrix with the April 2015 addenda to make the guidance more clear. It really does depend on where the bedroom is located. If it is in a dorm room or barracks and the bedroom is the main space where reading or work tasks would be performed then the task lighting is needed. If the bedroom is in a residential unit or the dorm has a separate room for the desks, the existing guidance would apply (1 lighting control per room).
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Laura Brandt
Mechanical Engineer
Luckett & Farley
LEEDuser Basic Member
4 thumbs up

Mon, 02/02/2015 - 16:34

Larissa, would you mind reviewing my Dormitory Lighting thread below and providing your opinion on our lighting scheme? We have two zones of lighting, one in the work area (with two student desks) and one over the beds, and each is fully dimmable. Would this level of control be sufficient, or would we still need to provide task lighting at the desks? Thanks!
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Kathryn West
LEED AP BD+C, O+M, Green Globes Professional
JLL
LEEDuser Basic Member
112 thumbs up

Thu, 12/03/2015 - 15:28

Larissa, I did not see this update in the April 2015 IEQ Space Type Matrix. Did I miss it or will it be in a future IEQ Space Type Matrix? Thanks!

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