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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Hello Bill,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Was going to ask you the following question but then I searched through BDLdft.dat. Very clever.<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">I am wondering how you determined that the MIN-FLOW-RATIO keyword is unused in the ZONE for systems where it is used in the SYSTEM? I am assuming that #SV(#P(“TYPE”))
refers to the system type. System 28 is PVVT and MIN-FLOW-RATIO is used in the System, no default is specified.
<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"><o:p> </o:p></span></p>
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<p class="MsoNormal"><b><span style="font-size:8.0pt;font-family:"Arial","sans-serif";color:#1F497D"><o:p> </o:p></span></b></p>
<p class="MsoNormal"><b><span style="font-size:8.0pt;font-family:"Arial","sans-serif";color:#1F497D">Christopher Jones, P. Eng.<o:p></o:p></span></b></p>
<p class="MsoNormal"><b><span style="font-size:8.0pt;font-family:"Arial","sans-serif";color:#1F497D">Rowan Williams Davies & Irwin Inc.</span></b><span style="font-size:8.0pt;font-family:"Arial","sans-serif";color:#1F497D"><br>
<i>Consulting Engineers & Scientists</i><br>
901 King Street West, Suite 400, Toronto, Ontario, M5V 3H5<br>
<b>T:</b> (519) 823-1311 ext 2052 <o:p></o:p></span></p>
<p class="MsoNormal"><b><span style="font-size:8.0pt;font-family:"Arial","sans-serif";color:#1F497D">M:</span></b><span style="font-size:8.0pt;font-family:"Arial","sans-serif";color:#1F497D"> (416) 697-0056
<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
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<p class="MsoNormal"><b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">From:</span></b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif""> Equest-users [mailto:equest-users-bounces@lists.onebuilding.org]
<b>On Behalf Of </b>Bishop, Bill via Equest-users<br>
<b>Sent:</b> Thursday, August 25, 2016 9:04 AM<br>
<b>To:</b> Darryl Kasun<br>
<b>Cc:</b> equest-users@lists.onebuilding.org<br>
<b>Subject:</b> Re: [Equest-users] Min Allowable Supply Air Flow<o:p></o:p></span></p>
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<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Darryl,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">There is no zone keyword for minimum ACH. But you can enter the zone design ACH (ZONE:AIR-CHANGES/HR) and set the minimum air changes as a percentage of this
using ZONE:MIN-FLOW-RATIO. You can write a keyword expression that enters and calculates this based on other zone inputs if you wanted to. For example, the expression below modifies the default DOE-2 expression for MIN-FLOW-RATIO, adding a calculation step
based on the zone input for AIR-CHANGES/HR. The sample calculation assumes you want a minimum ACH of 3, and calculates the MIN-FLOW-RATIO for any zones for which you enter a design ACH rate of 3 or more.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">if (#P("MIN-CFM-RATIO") == unused)<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"> then unused<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"> else switch #SV(#P("TYPE"))<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"> case 2 : unused<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"> case 17 : unused<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"> case 19 : unused<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"> case 26 : unused<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"> case 27 : unused<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"> case 28 : unused<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"> case 29 : unused<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"> default : if (#RV(#P("MIN-CFM-RATIO")) == 0)<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"> then #P("MIN-CFM-RATIO")<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"> else
<span style="background:yellow;mso-highlight:yellow">if (#RV(#L("AIR-CHANGES/HR")) == 0<o:p></o:p></span></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D;background:yellow;mso-highlight:yellow"> .AND. #L("AIR-CHANGES/HR") >= 3) then<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D;background:yellow;mso-highlight:yellow"> 3/#L("AIR-CHANGES/HR") else no_default endif</span><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"> endif<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"> endswitch<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"> endif<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">Regards,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">~Bill<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: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%;font-family:"Calibri","sans-serif";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="font-size:11.0pt;line-height:105%;font-family:"Calibri","sans-serif";color:#002060">
</span></i></b><span style="font-size:11.0pt;line-height:105%;font-family:"Calibri","sans-serif";color:#1F497D"> </span><span style="font-size:9.0pt;line-height:105%;font-family:"Arial","sans-serif";color:#1F497D">F: (585) 325-6005</span><span style="font-size:9.0pt;line-height:105%;font-family:"Arial","sans-serif";color:black"><o:p></o:p></span></p>
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<p class="MsoNormal" style="mso-line-height-alt:9.8pt"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><a href="mailto:wbishop@pathfinder-ea.com"><span style="font-size:9.0pt;font-family:"Arial","sans-serif";color:blue">bbishop@pathfinder-ea.com</span></a></span><span style="font-size:9.0pt;font-family:"Arial","sans-serif";color:black">
</span><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><a href="http://www.pathfinder-ea.com/"><span style="font-size:9.0pt;font-family:"Arial","sans-serif";color:blue">www.pathfinder-ea.com</span></a><o:p></o:p></span></p>
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<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>Darryl Kasun via Equest-users<br>
<b>Sent:</b> Wednesday, August 24, 2016 5:59 PM<br>
<b>To:</b> equest <<a href="mailto:equest-users@lists.onebuilding.org">equest-users@lists.onebuilding.org</a>><br>
<b>Subject:</b> [Equest-users] Min Allowable Supply Air Flow<o:p></o:p></span></p>
<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">Hello again eQUESTers,<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">For some zones, I want to set the min. allowable zone air supply flow rate to a certain ACH. There is a zonal input for min. design air changes/hr but I think eQUEST will go below this flow if possible. Sure I can calculate the minimum
flow as cfm.ft2 or ratio but would like to not do this work if possible! <o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">Is there a straight-up min. allowable ACH input for eQUEST?<o:p></o:p></p>
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