<html><body bgcolor="#FFFFFF"><div>Jie, another good forum for that type of question is LEEDuser. </div><div><br></div><div>In the spirit of full disclosure, YR&G is the primary author for the forum, but guidance is posted by hundreds of LEED experts from a variety of firms.</div><div><br><br><div><br></div><div>Arpan Bakshi, BD+C, <span class="Apple-style-span" style="-webkit-tap-highlight-color: rgba(26, 26, 26, 0.292969); -webkit-composition-fill-color: rgba(175, 192, 227, 0.230469); -webkit-composition-frame-color: rgba(77, 128, 180, 0.230469); ">PQP</span></div><div>T (646) 704-2880</div><div><br></div><div>YR&G</div><div><a href="http://www.yrgxyz.com">www.yrgxyz.com</a></div><div><br></div><div><br></div><div>...</div></div><div><br>On Jan 16, 2013, at 20:15, Nick Caton <<a href="mailto:ncaton@smithboucher.com">ncaton@smithboucher.com</a>> wrote:<br><br></div><div></div><blockquote type="cite"><div>
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<p class="MsoNormal"><span style="color:#1F497D">Hi Jie!<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">This is certainly a great forum for general 90.1 questions, though you will reach a broader audience I think with the [bldg-sim] mailing list. [bldg-rate] is a less active list that I’ve used in the past to reach
an audience better suited for more technical interpretations, as well. <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">Note well: <i>italicized phrases</i> in 90.1 have definitions you can refer to for clarification.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoListParagraph" style="text-indent:-.25in;mso-list:l1 level1 lfo3"><span style="color:#1F497D"><span style="mso-list:Ignore">1.<span style="font:7.0pt "Times New Roman"">
</span></span></span><span style="color:#1F497D">9.6.1.d addresses your concern about exceeding the space-by-space LPD. “Trade-offs” are permitted for the space-by-space method, permitting some spaces to exceed the prescribed level (with or without
additional lighting power per 9.6.2.a) so long as the building total installed lighting power does not exceed the total allowance. LEED EAp2/EAc1 does not change any of these rules to my understanding.<o:p></o:p></span></p>
<p class="MsoListParagraph" style="text-indent:-.25in;mso-list:l1 level1 lfo3"><span style="color:#1F497D"><span style="mso-list:Ignore">2.<span style="font:7.0pt "Times New Roman"">
</span></span></span><span style="color:#1F497D">Yes. Proposed model should reflect actual design, and Baseline model should reflect prescribed levels, inclusive of additional lighting power credits for applicable spaces.<o:p></o:p></span></p>
<p class="MsoListParagraph" style="text-indent:-.25in;mso-list:l1 level1 lfo3"><span style="color:#1F497D"><span style="mso-list:Ignore">3.<span style="font:7.0pt "Times New Roman"">
</span></span></span><span style="color:#1F497D">Interesting question! Your interpretation is probably defensible, but in my opinion overly conservative. I would not limit the prescribed additional 1.0W/ft2 (108.W/m2) to a lesser calculated value
to match the installed “decorative LPD.” LEED has some extra rules found in the footnotes of the EAp2 modeling spreadsheet along these lines to match exterior non-tradable totals between models, but I haven’t encountered any similar restrictions along these
lines for interior LPD calculations. <o:p></o:p></span></p>
<p class="MsoListParagraph"><span style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">That said, I can’t recall using these additional allowances heavily on a submitted LEED project, so perhaps/hopefully someone else can chime in with such experience!<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"><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"><image001.jpg></span><b><span style="font-family:"Stylus BT","sans-serif";color:#2D4D5E"><o:p></o:p></span></b></p>
<p class="MsoNormal"><b><span style="font-family:"Stylus BT","sans-serif";color:#2D4D5E"><o:p> </o:p></span></b></p>
<p class="MsoNormal"><b><span style="font-size:12.0pt;font-family:"Stylus BT","sans-serif";color:#2D4D5E">NICK CATON, P.E.<o:p></o:p></span></b></p>
<p class="MsoNormal"><span style="font-size:7.5pt;color:#CC9900">SENIOR ENGINEER<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:7.5pt;color:#CC9900"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;color:#2D4D5E">Smith & Boucher Engineers</span><span style="font-size:7.5pt;font-family:"Times New Roman","serif";color:#CC9900"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;color:#2D4D5E">25501 west valley parkway, suite 200<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"><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>
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<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
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<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""> <a href="mailto:equest-users-bounces@lists.onebuilding.org">equest-users-bounces@lists.onebuilding.org</a> [mailto:equest-users-bounces@lists.onebuilding.org]
<b>On Behalf Of </b>Jenny Zhang<br>
<b>Sent:</b> Tuesday, January 15, 2013 8:15 PM<br>
<b>To:</b> '<a href="mailto:equest-users@lists.onebuilding.org">equest-users@lists.onebuilding.org</a>'<br>
<b>Subject:</b> [Equest-users] Questions about 9.6.2 Additional Interior Lighting Power<o:p></o:p></span></p>
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<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><span lang="EN-GB">Dear All equest-users,<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB">I have a question about the interpretation of ASHRAE 90.1-2007 9.6.2.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB">Though it’s not about eQuest, I think I could get useful information here because many of you are familiar with 90.1.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB">9.6.2 presents that the additional lighting power shall not exceed 10.8W/m2. For example if a lift lobby has a general LPD is 10W/sqm and decorative LPD is 14W/sqm.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB">The additional LPD is exceed 14W/sqm and whether is complied with LEED EA Pr2 and how to do in the ASHRAE energy models?<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB">Following is my understanding:<o:p></o:p></span></p>
<p class="MsoListParagraph" style="text-indent:-.25in;mso-list:l0 level1 lfo2"><span lang="EN-GB"><span style="mso-list:Ignore">1.<span style="font:7.0pt "Times New Roman"">
</span></span></span><span lang="EN-GB">Item a.in 9.6.2 states that: the additional lighting power shall not exceed 10.8 W/sqm, but this is not included in 9.4. A project with additional LPD 14w/sqm could also achieve EA Pr2 & Cr1.<o:p></o:p></span></p>
<p class="MsoListParagraph" style="text-indent:-.25in;mso-list:l0 level1 lfo2"><span lang="EN-GB"><span style="mso-list:Ignore">2.<span style="font:7.0pt "Times New Roman"">
</span></span></span><span lang="EN-GB">For energy models: 1)baseline: the additional LPD should be 10.8W/sqm in this space while 14W/sqm should be 14W/sqm as design.<o:p></o:p></span></p>
<p class="MsoListParagraph" style="text-indent:-.25in;mso-list:l0 level1 lfo2"><span lang="EN-GB"><span style="mso-list:Ignore">3.<span style="font:7.0pt "Times New Roman"">
</span></span></span><span lang="EN-GB">For spaces with additional LPD lower than 10.8W/sqm, both the baseline model and proposed model should be with additional LPD the same with design.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB">Am I correct? <o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB">Thanks for your attentions.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB">Jie Zhang<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB"><o:p> </o:p></span></p>
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