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<p class="MsoNormal"><span style="color:#1F497D">Yes, what you stated below was also my understanding until the question was asked. If you looking at lighting power from an energy modeling standpoint, yes, all lighting must be included and task lighting is
treated as plug load and accounted for accordingly. However, in my project’s case, as we are talking exclusively about lighting alone and anything that qualifies as a plug load need not be included. I need to find the copy of the ASHRAE std that I could attach
as reference.<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">Thanks for your input and clarification. Appreciate it.<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">Priya<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<div>
<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>
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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""> Nick Caton [mailto:ncaton@smithboucher.com]
<br>
<b>Sent:</b> Friday, March 12, 2010 12:41 PM<br>
<b>To:</b> dlombard@earthlink.net; Priya Premchandran; bldg-sim@lists.onebuilding.org<br>
<b>Cc:</b> Mark Loeffler<br>
<b>Subject:</b> RE: [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"><span style="color:#1F497D">There’s a subtle but important distinction I think we’re making here within 90.1-2004:<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">9.1.3 and the glossary in combination define “installed interior lighting power.” Reading both appropriate passages, you can conclude this only includes “permanently installed” fixtures. I think we can all
agree cord and plug receptacles are in general not supposed to be included in any normal LPD (W/SF) calculation (for compliance documentation or otherwise).<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">Priya and the USGBC reviewer we’re discussing however are bringing up a separate issue, which is the passage in Appendix G that specifically tells us to handle cord and plug task lighting in a different manner.
This is specifically in the context of baseline/proposed energy models, and would not apply to any LPD sums made for purposes outside of energy modeling against a 90.1 baseline. I’ve copied my response below for reference.<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 border="0" width="119" height="37" id="_x0000_i1027" src="cid:image001.jpg@01CAC1E2.28356CC0" alt="cid:489575314@22072009-0ABB"></span><b><o:p></o:p></b></p>
<p class="MsoNormal"><b><o:p> </o:p></b></p>
<p class="MsoNormal"><b>NICK CATON, E.I.T.<o:p></o:p></b></p>
<p class="MsoNormal"><span style="font-size:7.5pt;color:#CC9900">PROJECT ENGINEER</span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:10.0pt;color:#2D4D5E">25501 west valley parkway<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;color:#2D4D5E">olathe ks 66061<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;color:#2D4D5E">direct 913 344.0036<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;color:#2D4D5E">fax 913 345.0617<o:p></o:p></span></p>
<p class="MsoNormal"><i><span style="font-size:10.0pt;color:#2D4D5E">Check out our new web-site @
</span></i><span style="color:#1F497D"><a href="www.smithboucher.com" title="blocked::www.smithboucher.com"><span style="font-size:10.0pt">www.smithboucher.com</span></a></span><u><span style="font-size:10.0pt;color:blue">
</span></u><span style="color:#1F497D"><o:p></o:p></span></p>
</div>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<div>
<div style="border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in 0in 0in">
<p class="MsoNormal"><b>From:</b> bldg-sim-bounces@lists.onebuilding.org [mailto:bldg-sim-bounces@lists.onebuilding.org]
<b>On Behalf Of </b>dlombard@earthlink.net<br>
<b>Sent:</b> Friday, March 12, 2010 11:45 AM<br>
<b>To:</b> Priya Premchandran; bldg-sim@lists.onebuilding.org<br>
<b>Cc:</b> Mark Loeffler<br>
<b>Subject:</b> Re: [Bldg-sim] ASHRAE 90.1-2004 and task lights<o:p></o:p></p>
</div>
</div>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal" style="margin-bottom:12.0pt">It was my understanding that only hard wired tasks lights were included in the watts/Sf calcs.
<br>
You could ask "Mark Loeffler" <ml@atelierten.com>, who's AT's Lighting Director. He'll know for sure.<br>
<br>
___<o:p></o:p></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><b>From:</b> bldg-sim-bounces@lists.onebuilding.org [mailto:bldg-sim-bounces@lists.onebuilding.org]
<b>On Behalf Of </b>Nick Caton<br>
<b>Sent:</b> Friday, March 12, 2010 11:45 AM<br>
<b>To:</b> Priya Premchandran<br>
<b>Cc:</b> BldgSim Mailing List<br>
<b>Subject:</b> Re: [Bldg-sim] ASHRAE 90.1-2004 and task lights<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<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>
<p class="MsoNormal"><span style="color:#1F497D"><img border="0" width="119" height="37" id="Picture_x0020_1" src="cid:image001.jpg@01CAC1E2.28356CC0" alt="cid:489575314@22072009-0ABB"></span><b><o:p></o:p></b></p>
<p class="MsoNormal"><b><o:p> </o:p></b></p>
<p class="MsoNormal"><b>NICK CATON, E.I.T.<o:p></o:p></b></p>
<p class="MsoNormal"><span style="font-size:7.5pt;color:#CC9900">PROJECT ENGINEER</span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:10.0pt;color:#2D4D5E">25501 west valley parkway<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;color:#2D4D5E">olathe ks 66061<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;color:#2D4D5E">direct 913 344.0036<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;color:#2D4D5E">fax 913 345.0617<o:p></o:p></span></p>
<p class="MsoNormal"><i><span style="font-size:10.0pt;color:#2D4D5E">Check out our new web-site @
</span></i><span style="color:#1F497D"><a href="www.smithboucher.com" title="blocked::www.smithboucher.com"><span style="font-size:10.0pt">www.smithboucher.com</span></a></span><u><span style="font-size:10.0pt;color:blue">
</span></u><span style="color:#1F497D"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><b>From:</b> 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></p>
<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>Priya Premchandran, Int'l Associate AIA, LEED® AP</b><br>
<a href="http://www.serapdx.com"><span style="color:#9C9C9C">www.serapdx.com</span></a><br>
503.445.7368<o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-GB" style="font-size:14.0pt;font-family:Webdings;color:#009242">P</span><span lang="EN-GB">
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