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<p class="MsoNormal"><span style="mso-fareast-language:EN-US">Your strategy for showing the impact of cycling fans on and off using the parametric run and the indoor fan mode keyword is appropriate. There appear to be a few things going on in the model that
are combining to give the results you are seeing. To begin with, please note that when the indoor fan mode is set to intermittent, outdoor air for ventilation is only supplied when the fan is running. The internal gains in the model are relatively high –
especially the lighting at 2 W/ft² as well as the people load. The R23 roof is pretty good, minimal glazing. So, a very large portion of the heating for this model is going to conditioning the outdoor air. By switching the fans to ‘intermittent’, you are
removing most of this outdoor air through the heating season and the fans are only being called on for heating beyond what is covered by the internal gains for a relatively small number of hours.
<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US">Other notes – the 70% combustion efficiency on the RTUs seems low to me.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US">I hope this is helpful.
<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US">Brian<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US"><o:p> </o:p></span></p>
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<p class="MsoNormal"><b><span lang="EN-US">From:</span></b><span lang="EN-US"> Equest-users <equest-users-bounces@lists.onebuilding.org>
<b>On Behalf Of </b>Ahmad Fraij via Equest-users<br>
<b>Sent:</b> June 5, 2025 6:33 PM<br>
<b>To:</b> BldgSim Mailing List <bldg-sim@onebuilding.org>; PKConsulting via Equest-users <equest-users@lists.onebuilding.org>; equest-users@onebuilding.org<br>
<b>Subject:</b> [Equest-users] Parametric Run for Fan Cycling on Demand<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"><strong><span style="font-family:"Calibri",sans-serif">CAUTION: This message originated from outside Smith + Andersen</span></strong><o:p></o:p></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Helvetica",sans-serif">Hello All,<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Helvetica",sans-serif"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Helvetica",sans-serif">I am trying to add a parametric run to make the supply fan cycle based on cooling and heating demands but when I set up the parametric run as per the screenshot below and
run simulation, all the space heating energy consumption disappear from the report as there is no heating system. So, am I setting up the correct parametric run as below or I am missing something? I have also attached the Equest files for this project if anyone
can help please. Thank you<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Helvetica",sans-serif"><o:p> </o:p></span></p>
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<p class="MsoNormal" style="margin-bottom:12.0pt"><span style="font-size:10.0pt;font-family:"Helvetica",sans-serif"><img width="1248" height="709" style="width:13.0in;height:7.3854in" id="_x0000_i1026" src="cid:image001.png@01DBD6BF.2D84FF30" alt="Inline image"><o:p></o:p></span></p>
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