<p style="MARGIN: 0in 0in 0pt" class="MsoNormal"><font size="3" face="Times New Roman">Is maximum 40%WWR intended to apply to gross building or to principal exposures? Assume 4 exposures: 1: 30% wall (100% window), 2: 20% wall (0% window), 3: 30% wall (0% window), 4: 20% wall (0% window). Building WWR = 30%. Would baseline window WWR match exposure 1 of design case at 100%WWR? Prior to 2004 addendum #1, (equalized banding) would have modeled all baseline walls at 30%, but now will match proportions of design case, even if an exposure exceeds 40% - (and proportionally reduce all exposures only if building WWR exceeds 40%)?</font></p>
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<div class="gmail_quote">On Tue, Apr 13, 2010 at 3:16 PM, Dana Troy <span dir="ltr"><<a href="mailto:DTroy@glumac.com">DTroy@glumac.com</a>></span> wrote:<br>
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<p class="MsoNormal"><span style="COLOR: #1f497d; FONT-SIZE: 11pt">All,</span></p>
<p class="MsoNormal"><span style="COLOR: #1f497d; FONT-SIZE: 11pt"> </span></p>
<p class="MsoNormal"><span style="COLOR: #1f497d; FONT-SIZE: 11pt">As per Addendum A to 90.1-2004, you do NOT need to distribute the baseline glazing uniformly in horizontal bands across the four orientations. ASHRAE 90.1-2007 is basically 90.1-2004 incorporating the changes made in Addendum A. All addenda can be found here: </span><a href="http://www.ashrae.org/technology/page/132" target="_blank">http://www.ashrae.org/technology/page/132</a><span style="COLOR: #1f497d; FONT-SIZE: 11pt"></span></p>
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<p class="MsoNormal"><span style="COLOR: #1f497d; FONT-SIZE: 11pt">If you read Table G3.1.5, it only states that the glass must not exceed 40% and must be distributed by the same proportions as the proposed building. Therefore, if you have a building with 50% WWR, you just have to reduce <i>each window by 20%</i>. This will still ensure that you have the same proportions (e.g. 20% of all of the glass on the north, 30% of all of the glass on the south, 40% of all of the glass on the east, and 10% of all of the glass on the west).</span></p>
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<p class="MsoNormal"><span style="COLOR: #1f497d; FONT-SIZE: 11pt">If your baseline WWR is less than 40%, then leave the window proportions, shapes, and sizes the same in the baseline and the proposed design.</span></p>
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<p class="MsoNormal"><span style="COLOR: #1f497d; FONT-SIZE: 11pt">This has all been well documented on the archives as well: </span><a href="http://lists.onebuilding.org/htdig.cgi/bldg-sim-onebuilding.org/2007-April/004077.html" target="_blank">http://lists.onebuilding.org/htdig.cgi/bldg-sim-onebuilding.org/2007-April/004077.html</a><span style="COLOR: #1f497d; FONT-SIZE: 11pt"></span></p>
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<p class="MsoNormal"><span style="COLOR: #1f497d; FONT-SIZE: 11pt">Regards,</span></p>
<p class="MsoNormal"><span style="COLOR: #1f497d"><br></span><b><span style="COLOR: #1f497d; FONT-SIZE: 10pt">Dana Troy</span></b><span style="COLOR: #1f497d"><br></span><span style="COLOR: #1f497d; FONT-SIZE: 10pt">Energy Analyst</span><span style="COLOR: #1f497d"><br>
</span><span style="COLOR: #1f497d; FONT-SIZE: 10pt">LEED<sup>®</sup> Accredited Professional</span><span style="COLOR: #1f497d"><br><br></span><a href="http://www.glumac.com/" target="_blank"><span style="TEXT-DECORATION: none"><img border="0" alt="http://www.glumac.com/glumacsig.gif" width="339" height="37"></span></a><span style="COLOR: #1f497d"></span></p>
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<p class="MsoNormal"><span style="COLOR: #1f497d; FONT-SIZE: 9pt">320 SW Washington, Suite 200</span><span style="COLOR: #1f497d"><br></span><span style="COLOR: #1f497d; FONT-SIZE: 9pt">Portland, OR 97204-2640</span><span style="COLOR: #1f497d"><br>
</span><span style="COLOR: #1f497d; FONT-SIZE: 9pt">T. 503.227.5280 F. 503.274.7674<br><br></span><b><span style="COLOR: #333333; FONT-SIZE: 10pt">Thinking. Inside the building.</span></b><span style="COLOR: #1f497d; FONT-SIZE: 9pt"><br>
</span><span style="COLOR: #333333; FONT-SIZE: 10pt"><a href="http://www.glumac.com/" target="_blank">www.glumac.com</a></span><span style="COLOR: #1f497d"> <br><img border="0" alt="http://www.glumac.com/consider.gif" width="309" height="23"></span><span style="COLOR: #1f497d; FONT-SIZE: 11pt"></span></p>
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<p class="MsoNormal"><b><span style="FONT-SIZE: 10pt">From:</span></b><span style="FONT-SIZE: 10pt"> Carol Gardner [mailto:<a href="mailto:cmg750@gmail.com" target="_blank">cmg750@gmail.com</a>] <br><b>Sent:</b> Tuesday, April 13, 2010 11:58 AM<br>
<b>To:</b> Rimes, Christie<br><b>Cc:</b> <a href="mailto:bldg-sim@lists.onebuilding.org" target="_blank">bldg-sim@lists.onebuilding.org</a>
<div class="im"><br><b>Subject:</b> Re: [Bldg-sim] Easy Question</div></span>
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<p style="MARGIN-BOTTOM: 12pt" class="MsoNormal">Perhaps I'm missing something, but didn't he ask us how to <b>calculate </b>the window to wall ratio? If I'm not missing something, we need to know specifically, is the wall number wall only or wall + glass. This level of information is shown on the LV-D report in eQUEST, if he's using eQUEST. That's why I said, "it depends".<br>
<br>Carol</p>
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<p class="MsoNormal">On Tue, Apr 13, 2010 at 11:45 AM, Rimes, Christie <<a href="mailto:Christie.Rimes@wspfk.com" target="_blank">Christie.Rimes@wspfk.com</a>> wrote:</p></div>
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<p>For the 90.1-2004 I have always taken it as Luke explained, evenly distributed the WWR of the entire building.</p>
<p>However for 90.1-2007 I have interpreted the description to mean that the windows stay in the same location as the proposed building?</p>
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<p class="MsoNormal"><b><span style="FONT-SIZE: 10pt">From:</span></b><span style="FONT-SIZE: 10pt"> <a href="mailto:bldg-sim-bounces@lists.onebuilding.org" target="_blank">bldg-sim-bounces@lists.onebuilding.org</a> [mailto:<a href="mailto:bldg-sim-bounces@lists.onebuilding.org" target="_blank">bldg-sim-bounces@lists.onebuilding.org</a>] <b>On Behalf Of </b>Vikram Sami<br>
<b>Sent:</b> Tuesday, April 13, 2010 11:38 AM<br><b>To:</b> JohannesHopf; <a href="mailto:bldg-sim@lists.onebuilding.org" target="_blank">bldg-sim@lists.onebuilding.org</a>; LukeWilson</span></p>
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<p class="MsoNormal"><span style="FONT-SIZE: 10pt"><br><b>Subject:</b> Re: [Bldg-sim] Easy Question</span></p></div></div></div>
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<p class="MsoNormal">Interesting point. I've never noticed this before, but this is different from 2004. </p></div>
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<p class="MsoNormal">2004 stated :</p></div>
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<p><i>Vertical fenestration areas for new buildings and additions shall equal that in the proposed design or 40% of gross abovegrade wall area, whichever is smaller, and shall be distributed uniformly in horizontal bands across the four orientations.</i></p>
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<p class="MsoNormal">It looks like they have changed it (shall be distributed on each face of the building in the same proportions in the proposed design) to be more representative of the actualy building. I think 2007 is asking you to distibute it by orientation (if you have 40% on the west, 25% south, 20%north and 25% east in your design, you will have 40% on the west, 25% south, 20%north and 25% east in your baseline). This makes sense because otherwise we were doing the striping as well as the 4 rotations which was a little redndant. </p>
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<p class="MsoNormal">(Not so easy question after all, but a good one). </p></div>
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<p class="MsoNormal"><br>--- On <b>Tue, 4/13/10, Wilson, Luke <i><<a href="mailto:LWilson@integral-group.net" target="_blank">LWilson@integral-group.net</a>></i></b> wrote:</p></div>
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<p style="MARGIN-BOTTOM: 12pt" class="MsoNormal"><br>From: Wilson, Luke <<a href="mailto:LWilson@integral-group.net" target="_blank">LWilson@integral-group.net</a>><br>Subject: Re: [Bldg-sim] Easy Question<br>To: "Hopf, Johannes" <<a href="mailto:johannes.hopf@dreso.com" target="_blank">johannes.hopf@dreso.com</a>>, "<a href="mailto:bldg-sim@lists.onebuilding.org" target="_blank">bldg-sim@lists.onebuilding.org</a>" <<a href="mailto:bldg-sim@lists.onebuilding.org" target="_blank">bldg-sim@lists.onebuilding.org</a>><br>
Date: Tuesday, April 13, 2010, 10:05 AM</p>
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<p class="MsoNormal">ASHRAE 90.1-2007 Table G3.1 reads:<br>"Vertical fenestration areas for new buildings and additions shall equal that in the proposed design or 40% of gross above-grade wall area, whichever is smaller, and shall be distributed on each face of the building in the same proportions in the proposed design."<br>
<br>I wasn't aware that this requirement had changed in the 2007 version (thanks Cam!).<br><br>Luke<br><br>-----Original Message-----<br>From: <a href="http://us.mc656.mail.yahoo.com/mc/compose?to=bldg-sim-bounces@lists.onebuilding.org" target="_blank">bldg-sim-bounces@lists.onebuilding.org</a> [mailto:<a href="http://us.mc656.mail.yahoo.com/mc/compose?to=bldg-sim-bounces@lists.onebuilding.org" target="_blank">bldg-sim-bounces@lists.onebuilding.org</a>] On Behalf Of Hopf, Johannes<br>
Sent: Tuesday, April 13, 2010 12:55 PM<br>To: <a href="http://us.mc656.mail.yahoo.com/mc/compose?to=bldg-sim@lists.onebuilding.org" target="_blank">bldg-sim@lists.onebuilding.org</a><br>Subject: Re: [Bldg-sim] Easy Question<br>
<br>I can't find this section in Table 1.3.? I just find the 40% limitation for<br>the baseline building. Can you post an excerpt?<br><br><br>Best regards<br><br> <br>Johannes <br><br>-----Ursprüngliche Nachricht-----<br>
Von: <a href="http://us.mc656.mail.yahoo.com/mc/compose?to=bldg-sim-bounces@lists.onebuilding.org" target="_blank">bldg-sim-bounces@lists.onebuilding.org</a><br>[mailto:<a href="http://us.mc656.mail.yahoo.com/mc/compose?to=bldg-sim-bounces@lists.onebuilding.org" target="_blank">bldg-sim-bounces@lists.onebuilding.org</a>] Im Auftrag von Wilson, Luke<br>
Gesendet: Dienstag, 13. April 2010 17:18<br>An: Eurek, John S NWO; <a href="http://us.mc656.mail.yahoo.com/mc/compose?to=bldg-sim@lists.onebuilding.org" target="_blank">bldg-sim@lists.onebuilding.org</a><br>Betreff: Re: [Bldg-sim] Easy Question<br>
<br>John,<br><br>I'm assuming you are using ASHRAE 90.1-2007 Appendix G for your Baseline?<br>If so, the way I read it from Table G3.1 is that you should evenly distribute<br>the WWR of the entire building, not for each floor. Therefore I would use<br>
11.4% for each floor.<br><br>Luke<br><br>-----Original Message-----<br>From: <a href="http://us.mc656.mail.yahoo.com/mc/compose?to=bldg-sim-bounces@lists.onebuilding.org" target="_blank">bldg-sim-bounces@lists.onebuilding.org</a><br>
[mailto:<a href="http://us.mc656.mail.yahoo.com/mc/compose?to=bldg-sim-bounces@lists.onebuilding.org" target="_blank">bldg-sim-bounces@lists.onebuilding.org</a>] On Behalf Of Eurek, John S<br>NWO<br>Sent: Tuesday, April 13, 2010 10:22 AM<br>
To: <a href="http://us.mc656.mail.yahoo.com/mc/compose?to=bldg-sim@lists.onebuilding.org" target="_blank">bldg-sim@lists.onebuilding.org</a><br>Subject: [Bldg-sim] Easy Question<br><br>I have a two story building. For the baseline I am evenly distributing the<br>
fenestration.<br><br>The first floor window area is 462.2 ft^2<br>The second floor window area is 647.1 ft^2<br><br>The first floor wall area is 4858 ft^2<br>The second floor wall area is 4858 ft^2<br><br>In the base line model do I use:<br>
<br>First floor 9.5%<br>Second floor 13.3%<br><br>OR<br><br>First floor 11.4%<br>Second floor 11.4%<br>_______________________________________________<br>Bldg-sim mailing list<br><a href="http://lists.onebuilding.org/listinfo.cgi/bldg-sim-onebuilding.org" target="_blank">http://lists.onebuilding.org/listinfo.cgi/bldg-sim-onebuilding.org</a><br>
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