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<p class="MsoNormal"><span style="color:#1F497D">Chris,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">I would use the ASHRAE 90.1 definitions for
<i>conditioned space</i> and <i>floor area, gross</i> to make the determination, since Baseline systems are determined based on “conditioned floor area”. Your plenums and unconditioned spaces should most likely not be counted in conditioned floor area, since
they are not conditioned, not counted as gross floor area (if less than 7.5’ headroom) or both. Spaces that aren’t part of your conditioned floor area shouldn’t factor into to the determination of thermal load intensity.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">I generally only apply G3.1.1 Exception B. to spaces with high loads, such as the examples listed (server rooms etc.).<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">Regards,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">~Bill<o:p></o:p></span></p>
<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:"Franklin Gothic Medium",sans-serif;color:black">William Bishop, PE, BEMP, BEAP, CEM, LEED AP
</span></b><b><span style="font-size:10.0pt;font-family:"Franklin Gothic Medium",sans-serif;color:#006600">|</span></b><b><span style="font-size:10.0pt;font-family:"Franklin Gothic Medium",sans-serif;color:black"> Pathfinder Engineers & Architects LLP<o:p></o:p></span></b></p>
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<p class="MsoNormal" style="line-height:105%"><b><span style="font-size:9.0pt;line-height:105%;font-family:"Arial",sans-serif;color:black">Senior Energy Engineer<o:p></o:p></span></b></p>
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<p class="MsoNormal" style="line-height:105%"><span style="font-size:9.0pt;line-height:105%;font-family:"Arial",sans-serif;color:#1F497D">134 South Fitzhugh Street</span><span style="font-size:9.0pt;line-height:105%;color:#1F497D">
</span><span style="font-size:9.0pt;line-height:105%;font-family:"Arial",sans-serif;color:#1F497D">Rochester, NY 14608<o:p></o:p></span></p>
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<p class="MsoNormal" style="line-height:105%"><b><i><span style="font-size:9.0pt;line-height:105%;font-family:"Arial",sans-serif;color:#002060">T: (585) 698-1956</span></i></b><b><i><span style="color:#002060">
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<p class="MsoNormal" style="line-height:105%"><span style="color:#1F497D"><a href="mailto:wbishop@pathfinder-ea.com"><span style="font-size:9.0pt;line-height:105%;font-family:"Arial",sans-serif">bbishop@pathfinder-ea.com</span></a></span><span style="font-size:9.0pt;line-height:105%;font-family:"Arial",sans-serif;color:black">
</span><span style="color:#1F497D"><a href="http://www.pathfinder-ea.com/"><span style="font-size:9.0pt;line-height:105%;font-family:"Arial",sans-serif">www.pathfinder-ea.com</span></a><o:p></o:p></span></p>
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Fee and Dividend - simple, effective, and market-based.</span><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>From:</b> Bldg-sim [mailto:bldg-sim-bounces@lists.onebuilding.org]
<b>On Behalf Of </b>Jones, Christopher<br>
<b>Sent:</b> Friday, December 04, 2015 10:25 AM<br>
<b>To:</b> bldg-sim@lists.onebuilding.org<br>
<b>Subject:</b> [Bldg-sim] ASHRAE 90.1-2007 G3.1.1.(b)<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif;color:#1F497D">For determining the baseline system type, 90.1-2007 Appendix G, G3.1.1 list exceptions for determining the baseline system type. Exception (b) states that spaces
with a peak thermal load that differs by 10 Btu/h*ft2 or more from the average of the other spaces served by the system are to be on a separate single zone system.
<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif;color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif;color:#1F497D">My question is about the word “served”. Are plenum and unconditioned zones on the system to be included in determining the average peak load? These spaces aren’t
really “served” by the system. <o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif;color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif;color:#1F497D">I supposed plenums could be considered as served if the return air path is through the plenum?
<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif;color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif;color:#1F497D">Or do I assume all spaces on the system are “served” regardless of the space type (conditioned, unconditioned, plenum)?<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif;color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif;color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif;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>
<p class="MsoNormal"><span style="color:#1F497D"><img border="0" width="108" height="43" id="Picture_x0020_2" src="cid:image008.png@01D12E80.36771340" alt="cid:image003.png@01D09C46.E75BA0D0"></span><b><span style="color:#1C467A"><o:p></o:p></span></b></p>
<p class="MsoNormal"><b><span style="font-size:10.0pt;font-family:"Arial",sans-serif;color:#1C467A">Christopher Jones,</span></b><b><span style="font-size:10.0pt;font-family:"Arial",sans-serif;color:#1F497D">
</span></b><span style="font-size:10.0pt;font-family:"Arial",sans-serif;color:#1F497D">P.Eng.<i>
<br>
</i></span><span lang="EN-CA" style="font-size:10.0pt;font-family:"Arial",sans-serif;color:#1F497D">Senior Engineer<b><o:p></o:p></b></span></p>
<p class="MsoNormal"><b><span lang="EN-CA" style="font-size:10.0pt;font-family:"Arial",sans-serif;color:#1F497D"><o:p> </o:p></span></b></p>
<p class="MsoNormal"><b><span lang="EN-CA" style="font-size:10.0pt;font-family:"Arial",sans-serif;color:#1F497D">WSP Canada Inc.<o:p></o:p></span></b></p>
<p class="MsoNormal"><span lang="EN-CA" style="font-size:10.0pt;font-family:"Arial",sans-serif;color:#1F497D">2300 Yonge Street, Suite 2300<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-CA" style="font-size:10.0pt;font-family:"Arial",sans-serif;color:#1F497D">Toronto, ON M4P 1E4</span><span lang="EN-CA" style="font-size:10.0pt;font-family:"Arial",sans-serif;color:#595959"><br>
</span><span lang="EN-CA" style="font-size:10.0pt;font-family:"Arial",sans-serif;color:#1F497D">T +1 416-644-4226<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-CA" style="font-size:10.0pt;font-family:"Arial",sans-serif;color:#1F497D">F +1 416-487-9766<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-CA" style="font-size:10.0pt;font-family:"Arial",sans-serif;color:#1F497D">C +1 416-697-0056<o:p></o:p></span></p>
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<p class="MsoNormal"><span lang="EN-CA" style="font-size:10.0pt;font-family:"Arial",sans-serif;color:#1F497D"><a href="http://www.wspgroup.com/">www.wspgroup.com</a>
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