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<p class=MsoNormal><span style='color:#1F497D'>The appropriate section happens
to be right in front of me – assuming you have task lights defined in the
construction documents (plans/specs) being reviewed, it looks to me that your
USGBC reviewer is correct, but not telling you the whole story…<o:p></o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'>90.1-2004, Appendix G, Table
G3.1, Section 6. “Lighting” (d):<o:p></o:p></span></p>
<p class=MsoNormal><i><span style='color:#1F497D'><o:p> </o:p></span></i></p>
<p class=MsoNormal><i><span style='color:#1F497D'>“Lighting system power
shall include all lighting system components shown or provided for on the plans
(including lamps and ballasts and task and furniture-mounted fixtures).”<o:p></o:p></span></i></p>
<p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'>The following exception for multifamily
dwellings and hotel/motel guest rooms makes a distinction regarding cord + receptacle
task lights:<o:p></o:p></span></p>
<p class=MsoNormal><i><span style='color:#1F497D'><o:p> </o:p></span></i></p>
<p class=MsoNormal><i><span style='color:#1F497D'>“<b>Exception:</b> For…
spaces in which lighting systems are connected via receptacles and are not
shown or provided for on building plans, assume identical lighting power for
the <u>proposed</u> and <u>baseline building designs</u> in the simulations,
but exclude these loads when calculating the <u>baseline building performance</u>
and <u>proposed building performance</u>.”<o:p></o:p></span></i></p>
<p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'>Falling back to the glossary
definition for <u>performance</u> (cost), that means if you are modeling the
task lights, add their wattage identically to the baseline and proposed model
LPD’s to model the internal load contributions, but then subtract the
cost of the energy to operate those fixtures from the final costs you arrive at.<o:p></o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'>In summary, you should model the
task lights as internal loads, but not the cost of operating them. That’s
my take anyway =),<o:p></o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'>~Nick<o:p></o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p>
<div>
<p class=MsoNormal><span style='color:#1F497D'><img width=119 height=37
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<p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p>
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<div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in 0in 0in'>
<p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>From:</span></b><span
style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>
bldg-sim-bounces@lists.onebuilding.org
[mailto:bldg-sim-bounces@lists.onebuilding.org] <b>On Behalf Of </b>Priya
Premchandran<br>
<b>Sent:</b> Friday, March 12, 2010 11:16 AM<br>
<b>To:</b> bldg-sim@lists.onebuilding.org<br>
<b>Subject:</b> [Bldg-sim] ASHRAE 90.1-2004 and task lights<o:p></o:p></span></p>
</div>
</div>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>Hello Listserv members,<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>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. <u>plugged in</u> 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?<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal> Any input is greatly appreciated.<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>Thanks,<o:p></o:p></p>
<p class=MsoNormal>Priya<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal style='mso-margin-top-alt:10.0pt;margin-right:0in;
margin-bottom:10.0pt;margin-left:0in'><b><span style='font-size:9.0pt;
font-family:"Arial","sans-serif";color:#777777'>Priya Premchandran, Int'l
Associate AIA, LEED® AP</span></b><span style='font-size:8.0pt;
font-family:"Arial","sans-serif";color:#9C9C9C'><br>
<a href="http://www.serapdx.com"><span style='color:#9C9C9C'>www.serapdx.com</span></a><br>
503.445.7368<o:p></o:p></span></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
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