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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

Control Via Software Platform

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Andrew Gil
Architect, Associate, LEED AP BD+C. USGBC NY Upstate Board of Directors
HOLT Architects. P.C.
LEEDuser Basic Member
43 thumbs up

Hello All, An unfortunate error was made when “multi-occupant space” was assumed by a team member to include a shared office space, and construction is complete. The electrical engineer has proposed providing individual control via a software platform, and plans to offer the following explanation to the LEED review team; we are anxious to hear your thoughts regarding the proposed solution and response. Thank you “The lighting and lighting control system specified includes a fully-programmable control system with data network interface via a software system/program. The full lighting system, which is based on demand-control ballasts driven by a web controller with input from a combination sensor/photocell unit with wall switch on/off, also allows manual light-level control via data input from a computer workstation or smart phone. An individual can manually control the light levels and on/off within the room from any source with network access allowing the occupant to set the light level.”

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Kathryn West
LEED AP BD+C, O+M, Green Globes Professional
JLL
LEEDuser Basic Member
112 thumbs up

Fri, 04/18/2014 - 14:06

I remember reading somewhere that the "controls" cannot require "tools" so it might not help to describe that "manual light-level control via data input from a computer workstation or smart phone." I'd consider the phone or computer a tool. I don't have time to look it up at the moment but if I find where I read that I will certainly post it.
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Julia Weatherby
President
Weatherby Design & Co. Engineers
LEEDuser Basic Member
67 thumbs up

Fri, 04/18/2014 - 14:22

Hi- I would think the "tools" objection could be overcome by making it clear that the occupants all have computer work stations and/or smart phones and are trained in how to use the software control system for the lighting. However, from the description it sounds as though one would be changing the lighting level in the entire room -- which would not meet the intent of the credit. The lighting adjustments have to be made at the individual work station level in order to meet the intent of the credit. One work around to meet the credit would be to provide each desk with an inexpensive LED desk lamp. http://www.homedepot.com/p/Eti-12-in-Black-LED-Desk-Lamp-540412/204591058#specifications In this case, the desk lamps should be included in the energy model.

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