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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif">Hi Madhav,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif">I suggest you consider adding separate single-zone systems for select spaces based on interpreting G3.1.1.c (if you’re modeling per Appendix G).<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif">If you go the simple route and model one System 7 per floor in the Baseline, it could be argued that you should model the Proposed design with the same humidification for the
entire floor, the same as the Baseline is modeled. (See language in Table G3.1 No.4 that “Temperature and humidity control set points and schedules… shall be the same for proposed design and baseline building design.”<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif">If your project allows for flexibility in modeling approach (i.e. you don’t have to follow a strict interpretation of Appendix G.) then your Option 2 of modeling multiple Systems
7 matching your Proposed zoning makes sense.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif">Regards,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif">~Bill<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif"><o:p> </o:p></span></p>
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Senior Associate / Sustainability & Energy Engineer of Distinction<o:p></o:p></span></p>
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<p class="MsoNormal"><b><span style="font-size:11.0pt;font-family:"Calibri",sans-serif">From:</span></b><span style="font-size:11.0pt;font-family:"Calibri",sans-serif"> Bldg-sim <bldg-sim-bounces@lists.onebuilding.org>
<b>On Behalf Of </b>Madhav Munshi via Bldg-sim<br>
<b>Sent:</b> Thursday, February 13, 2025 10:53 AM<br>
<b>To:</b> bldg sim <bldg-sim@lists.onebuilding.org><br>
<b>Subject:</b> [Bldg-sim] ASHRAE 90.1 zoning for System 7 - variable temp and humidity requirements<o:p></o:p></span></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal" style="background:#FFFF99"><strong><span style="font-size:10.0pt;font-family:"Aptos",sans-serif;color:#9C6500;background:#FFFF99">External Email:
</span></strong><span style="font-size:10.0pt;color:black;background:#FFFF99">Treat links and attachments with caution.</span><o:p></o:p></p>
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<p class="MsoNormal"><span style="font-size:11.0pt;color:black">Hello everyone, <o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:11.0pt;color:black"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="font-size:11.0pt;color:black">We are working on a project - 5 floors and greater than 200,000sf. Each floor has spaces with different temperature and humidity requirements. <o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:11.0pt;color:black"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="font-size:11.0pt;color:black">For example <o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:11.0pt;color:black">Space type 1: 70F - 50% RH Strict control <o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:11.0pt;color:black">Space type 2: 70-75F 40% min - 60% max RH, <o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:11.0pt;color:black">Space type 3: 70-75F 50% max RH summer only<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:11.0pt;color:black"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="font-size:11.0pt;color:black">This happens on all floors. <o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:11.0pt;color:black"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="font-size:11.0pt;color:black">Proposed zoning has spaces combined on the basis of different environmental requirements. <o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:11.0pt;color:black"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="font-size:11.0pt;color:black">How would you approach the zoning for the ASHRAE Baseline? <o:p></o:p></span></p>
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<span style="font-size:11.0pt">One System 7 per floor: If we do floor by floor, we will be adding system level humidification for all spaces on that floor and allow whatever happens to each room. Definitely might end up humidifying spaces that don't need humidification<o:p></o:p></span></li></ol>
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<span style="font-size:11.0pt">Multiple Systems per floor: Split up each floor zoning by temp and humidity and have multiple Sys 7's per floor. <o:p></o:p></span></li></ol>
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<span style="font-size:11.0pt">Alternative Approach??<o:p></o:p></span></li></ol>
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<p class="MsoNormal"><span style="font-size:11.0pt;color:black">What do you all think? I am inclined to start with 1 system 7 per floor and stick with the ASHRAE requirements. <o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:11.0pt;color:black"><o:p> </o:p></span></p>
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<div id="Signature">
<p style="margin-left:1.5in;text-indent:-1.5in"><span style="font-size:11.0pt;font-family:"Arial",sans-serif">Thank you</span><o:p></o:p></p>
<p style="margin-left:1.5in;text-indent:-1.5in"><o:p> </o:p></p>
<p style="margin-left:1.5in;text-indent:-1.5in"><span style="font-size:11.0pt;font-family:"Arial",sans-serif;color:black">Madhav</span><o:p></o:p></p>
<p style="margin-left:1.5in;text-indent:-1.5in"><b><span style="font-size:10.0pt;font-family:"Arial",sans-serif;color:#66869E"> </span></b><o:p></o:p></p>
<p style="margin-left:1.5in;text-indent:-1.5in"><b><span style="font-size:10.0pt;font-family:"Arial",sans-serif;color:#66869E">MADHAV MUNSHI</span></b><span style="font-size:10.0pt;font-family:"Arial",sans-serif;color:black"> | BEMP</span><o:p></o:p></p>
<p style="margin-left:1.5in;text-indent:-1.5in"><span style="font-size:8.0pt;font-family:"Arial",sans-serif;color:black">Senior Associate</span><o:p></o:p></p>
<p style="margin-left:1.5in;text-indent:-1.5in"><u><span style="font-size:8.0pt;font-family:"Arial",sans-serif;color:black"><a href="mailto:mmunshi@kohlerronan.com">mmunshi@kohlerronan.com</a>
</span></u><o:p></o:p></p>
<p style="margin-left:1.5in;text-indent:-1.5in"><span style="font-family:"Arial",sans-serif"> </span><o:p></o:p></p>
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