<html><head><meta http-equiv="content-type" content="text/html; charset=utf-8"></head><body dir="auto"><div>Thanks for the feedback- so if the justification for the approach is solely based on the user manual explanation- I can accept that. I'll cross reference it for the 2007 user manual to put it in my notes.</div><div><br></div><div>I've always used air-flow first as a standard reset for all my design energy models, What is counter-intuitive here is that the title of the Appendix G section specifically states 'reset-temp', so why should we not take the section text literally? I've always humbly assumed that the ASHRAE standard writers know more than me. After all these years of creating Baseline conforming models (or so I thought), this makes me feel lost all over again. AND is it not possible to apply code standard requirements without the use of the User Manual? </div><div><br></div><div>Thankful- but-frustrated,<br><br><div>Pasha<div>Ph: 308-763-1593</div></div></div><div><br>On Apr 20, 2017, at 6:48 AM, Jones, Christopher <<a href="mailto:Christopher.r.Jones@wspgroup.com">Christopher.r.Jones@wspgroup.com</a>> wrote:<br><br></div><blockquote type="cite"><div>
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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">I had always assumed temperature first but reading the PNNL 90.1-2010 Performance Rating Method Reference Manual, 3.121 (pdf page 151), it states “For systems
5 through 8, the air temperature for cooling shall be reset higher by 5°F under the minimum cooling load conditions using a reset by warmest zone, airflow first strategy.”<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">The manual states that the airflow first strategy minimizes zone reheat coil energy ( or overcooling) and central chiller energy consumption at the cost of possible
increased fan energy. <o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">Unfortunately, the reviewer may have a case.
<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-CA" style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D;mso-fareast-language:EN-CA"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"><image001.jpg></span><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D;mso-fareast-language:FR"><o:p></o:p></span></p>
<p class="MsoNormal"><b><span style="font-size:6.0pt;font-family:"Calibri",sans-serif;color:#1F497D;mso-fareast-language:FR"><o:p> </o:p></span></b></p>
<p class="MsoNormal"><b><span lang="EN-GB" style="font-size:10.0pt;font-family:"Arial",sans-serif;color:#1F497D;mso-fareast-language:FR">Christopher R. Jones</span></b><span lang="EN-GB" style="font-size:10.0pt;font-family:"Arial",sans-serif;color:#1F497D;mso-fareast-language:FR">,
P.Eng.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="font-size:10.0pt;font-family:"Arial",sans-serif;color:#1F497D;mso-fareast-language:FR">Technical Specialist</span><span style="font-size:10.0pt;font-family:"Arial",sans-serif;color:#1F497D;mso-fareast-language:FR"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif;color:#1F497D;mso-fareast-language:FR"><o:p> </o:p></span></p>
<p class="MsoNormal"><b><span lang="EN-GB" style="font-size:10.0pt;font-family:"Arial",sans-serif;color:#1F497D;mso-fareast-language:FR">WSP Canada Inc.</span></b><span lang="EN-GB" style="font-size:10.0pt;font-family:"Arial",sans-serif;color:#1F497D;mso-fareast-language:FR"><br>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif;color:#1F497D;mso-fareast-language:FR"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif;color:#1F497D;mso-fareast-language:EN-CA"><a href="http://www.wspgroup.ca/"><span style="color:blue">www.wspgroup.ca</span></a></span><u><span lang="EN-CA" style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:blue;mso-fareast-language:EN-CA"><o:p></o:p></span></u></p>
<p class="MsoNormal" style="text-autospace:none"><b><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#7F7F7F;mso-fareast-language:FR"><o:p> </o:p></span></b></p>
<p class="MsoNormal" style="text-autospace:none"><i><span style="font-size:10.0pt;font-family:"Arial",sans-serif;color:#6EA900;mso-fareast-language:FR">Please consider the environment before printing...<o:p></o:p></span></i></p>
<p class="MsoNormal"><span lang="EN-CA" style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"><o:p> </o:p></span></p>
<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"> Equest-users [<a href="mailto:equest-users-bounces@lists.onebuilding.org">mailto:equest-users-bounces@lists.onebuilding.org</a>]
<b>On Behalf Of </b>Pasha Korber-Gonzalez via Equest-users<br>
<b>Sent:</b> Thursday, April 20, 2017 3:59 AM<br>
<b>To:</b> eQUEST Users List <<a href="mailto:equest-users@lists.onebuilding.org">equest-users@lists.onebuilding.org</a>><br>
<b>Subject:</b> [Equest-users] Supply Air Temp Reset Interpretation Please...?<o:p></o:p></span></p>
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<p class="MsoNormal">Hello--- I received this note from a fellow energy model reviewer (non-LEED review comment) regarding my Baseline energy model that is supposed to be compliant with Appendix G. I disagree with what they are saying. I appreciate your feedback
please and verification if in fact I am wrong in how I am interpreting Section G3.1.3.12.<o:p></o:p></p>
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<p class="MsoNormal">"We believe TEMP-FIRST supply air reset control strategy is not the correct interpretation of G3.1.3.12 – rather, AIRFLOW-FIRST should be used."<o:p></o:p></p>
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<p class="MsoNormal">Thanks!<o:p></o:p></p>
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<p class="MsoNormal">Pasha<o:p></o:p></p>
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