[Bldg-sim] ASHRAE 90.1-2004 and task lights

[Karen Walkerman]

I have been involved in a couple of projects where the overhead lighting has
been designed to have a low ambient light level, with task lighting provided
for the work spaces.  This is because most people in the offices will be
working at computers, and not need high levels of lighting.

For one or two projects, I included task lighting in the proposed case, but
not in the base case.  I received comments from the LEED reviewer that all
process lighting (including task lights) must be the same between the
proposed and the baseline.  This is regardless of the fact that the presence
of task lights allowed us to reduce the installed lighting power.

Ever since, I've been including task lights equally in the proposed and
baseline cases, and had no comments on this approach.

--
Karen

On Sat, Mar 13, 2010 at 10:58 AM, Gerard Hazel <ghazel at aol.com> wrote:

>  Hi Priya,
>
>
>
> I have been involved in a number of CI projects and I have the same
> understanding - only permanently installed task lighting needs to be
> included.
>
> Can you provide the reviewers comments?  Maybe I or someone else can see
> what they’re getting at.
>
>
>
> *Gerard Hazel*
>
> *Sustainable Systems LLC*
>
> *973-538-5937*
>
> *www.SustainSys.com*
>
>
>
> -----Original Message-----
> *From:* Priya Premchandran [mailto:priyap at serapdx.com]
> *Sent:* Friday, March 12, 2010 12:16 PM
> *To:* bldg-sim at lists.onebuilding.org
> *Subject:* [Bldg-sim] ASHRAE 90.1-2004 and task lights
>
>
>
> Hello Listserv members,
>
>
>
> I just received a question from GBCI on a LEED CI project related to
> lighting power density. It was my understanding that per ASHRAE 90.1-2004
> std. *plugged in* task lights are exempted from the overall lighting power
> density calculations. However, our review came back saying that task lights
> should be included in the overall calculations. Is this true? Has the
> standard changed recently?
>
>
>
>  Any input is greatly appreciated.
>
>
>
> Thanks,
>
> Priya
>
>
>
> *Priya Premchandran, Int'l Associate AIA, LEED® AP*
> www.serapdx.com
> 503.445.7368
>
> P *Please consider the environmental impact before printing this email*
>
>
>
>
>
>
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