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<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>“</span><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>However, the way eQuest calculates min zone OA is by taking the
higher value of either OA-FLOW/PER or OA-FLOW/AREA, not the combine
total. To correctly model the OA requirement, I have to calculate the
combine OA rate (i.e. {[cfm/per * max # of person] + [cfm/area * floor area] }
/ floor area) and input that value in OA-FLOW/AREA.”<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";
color:#1F497D'>Are you sure about that Victor? Last time I checked, when I
input 5 CFM / person and 0.06 CFM / square foot, the minimum zone OA was the
SUM of these two values. In which case you can model DCV without having to use
that option in the system tab. eQuest will automatically size the 5 CFM /
person portion of the outside air based on the occupancy diversity. Am I wrong
here?</span></b><b><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p></o:p></span></b></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><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'> </span><o:p></o:p></p>
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<div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in 0in 0in'>
<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"'> Victor Yeung
[mailto:Victor@invirosystems.ca] <br>
<b>Sent:</b> Wednesday, April 28, 2010 12:30 PM<br>
<b>To:</b> Bishop, Bill; Rob Hudson<br>
<b>Cc:</b> equest-users@lists.onebuilding.org<br>
<b>Subject:</b> Re: [Equest-users] Demand Controlled Ventilation</span><o:p></o:p></p>
</div>
</div>
<p class=MsoNormal> <o:p></o:p></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>Hello all,</span><o:p></o:p></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'> </span><o:p></o:p></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>I also have a similar question related to minimum OA settings
for DCV, particularly with OA-FLOW/PER and OA-FLOW/AREA. Say I am using
ASHRAE 62.1 for my OA rates, there are minimum requirements for cfm/person and
cfm/area. However, the way eQuest calculates min zone OA is by taking the
higher value of either OA-FLOW/PER or OA-FLOW/AREA, not the combine
total. To correctly model the OA requirement, I have to calculate the
combine OA rate (i.e. {[cfm/per * max # of person] + [cfm/area * floor area] }
/ floor area) and input that value in OA-FLOW/AREA. Now, the problem
comes in when we include DCV into the model, at which eQuest cannot calculate
the savings because the OA-FLOW/PER value is not entered. I would greatly
appreciate it if anyone can clarify this.</span><o:p></o:p></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'> </span><o:p></o:p></p>
<table class=MsoNormalTable border=0 cellspacing=0 cellpadding=0 width=643
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<p class=MsoNormal><b><span style='font-size:9.0pt;font-family:"Calibri","sans-serif";
color:#1F497D;text-transform:uppercase;letter-spacing:.2pt'>VICTOR YEUNG, </span></b><i><span
style='font-size:9.0pt;font-family:"Calibri","sans-serif";color:#1F497D;
letter-spacing:.2pt'>BASc, LEED® AP</span></i><o:p></o:p></p>
<p class=MsoNormal><i><span style='font-size:9.0pt;font-family:"Calibri","sans-serif";
color:#1F497D;letter-spacing:.2pt'>EIT - LEED®/Sustainable Development</span></i><o:p></o:p></p>
<p class=MsoNormal><i><span style='font-size:8.0pt;font-family:"Cambria","serif";
color:#262626;letter-spacing:.2pt'><a href="mailto:victor@invirosystems..ca"><span
style='font-family:"Times New Roman","serif"'>victor@invirosystems.ca</span></a></span></i><o:p></o:p></p>
</td>
</tr>
</table>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'> </span><o:p></o:p></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'> </span><o:p></o:p></p>
<div>
<div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in 0in 0in'>
<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"'> Bishop, Bill
[mailto:wbishop@pathfinder-ea.com] <br>
<b>Sent:</b> April 28, 2010 11:16 AM<br>
<b>To:</b> Rob Hudson<br>
<b>Cc:</b> equest-users@lists.onebuilding.org<br>
<b>Subject:</b> Re: [Equest-users] Demand Controlled Ventilation</span><o:p></o:p></p>
</div>
</div>
<p class=MsoNormal> <o:p></o:p></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif";
color:navy'>Rob,</span><o:p></o:p></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif";
color:navy'> </span><o:p></o:p></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif";
color:navy'>You need to set up an hourly report. See attached.</span><o:p></o:p></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif";
color:navy'> </span><o:p></o:p></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif";
color:navy'>Bill</span><o:p></o:p></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif";
color:navy'> </span><o:p></o:p></p>
<div>
<div class=MsoNormal align=center style='text-align:center'>
<hr size=2 width="100%" align=center>
</div>
<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"'> Rob Hudson
[mailto:rdh4176@gmail.com] <br>
<b>Sent:</b> Wednesday, April 28, 2010 11:06 AM<br>
<b>To:</b> Bishop, Bill<br>
<b>Cc:</b> equest-users@lists.onebuilding.org<br>
<b>Subject:</b> Re: [Equest-users] Demand Controlled Ventilation</span><o:p></o:p></p>
</div>
<p class=MsoNormal> <o:p></o:p></p>
<p class=MsoNormal style='margin-bottom:12.0pt'>How can i tell if the system is
using a lower OA CFM during the less occupied times? <o:p></o:p></p>
<div>
<p class=MsoNormal>On Wed, Apr 28, 2010 at 10:43 AM, Bishop, Bill <<a
href="mailto:wbishop@pathfinder-ea.com">wbishop@pathfinder-ea.com</a>>
wrote:<o:p></o:p></p>
<div>
<div>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
style='font-size:10.0pt;font-family:"Arial","sans-serif";color:navy'>Rob,</span><o:p></o:p></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
style='font-size:10.0pt;font-family:"Arial","sans-serif";color:navy'> </span><o:p></o:p></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
style='font-size:10.0pt;font-family:"Arial","sans-serif";color:navy'>I recently
modeled DCV successfully for the first time. (I showed savings anyway.) You
need to enter zone-level OA as OA-FLOW/PER and/or OA-FLOW/AREA. The OA flow/per
(person) is what will get you the savings, based on your occupancy schedule(s).
I also created a MIN-AIR-SCH, coinciding with the fan schedule, set to zero
when fan is off and -999 when fan is on.</span><o:p></o:p></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
style='font-size:10.0pt;font-family:"Arial","sans-serif";color:navy'> </span><o:p></o:p></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
style='font-size:10.0pt;font-family:"Arial","sans-serif";color:navy'>Regards,</span><o:p></o:p></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
style='font-size:10.0pt;font-family:"Arial","sans-serif";color:navy'>Bill</span><o:p></o:p></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
style='font-size:10.0pt;font-family:"Arial","sans-serif";color:navy'> </span><o:p></o:p></p>
<div>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><b><span
style='font-size:10.0pt;font-family:"Franklin Gothic Medium Cond","sans-serif";
color:black'>William Bishop, EIT, BEMP, LEED<sup>®</sup> AP </span></b><b><span
style='font-size:10.0pt;font-family:"Franklin Gothic Medium Cond","sans-serif";
color:#006600'>|</span></b><b><span style='font-size:10.0pt;font-family:"Franklin Gothic Medium Cond","sans-serif";
color:black'> Pathfinder Engineers & Architects LLP</span></b><o:p></o:p></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
style='font-size:9.0pt;font-family:"Arial","sans-serif";color:black'>Mechanical
Engineer</span><o:p></o:p></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
style='font-size:5.0pt;font-family:"Arial","sans-serif";color:black'> </span><o:p></o:p></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
style='font-size:9.0pt;font-family:"Arial","sans-serif";color:navy'>134 South
Fitzhugh Street</span><span style='font-size:9.0pt;color:navy'><br>
</span><span style='font-size:9.0pt;font-family:"Arial","sans-serif";
color:navy'>Rochester, NY 14608</span><span style='font-size:9.0pt;color:navy'><br>
</span><span style='font-size:9.0pt;font-family:"Arial","sans-serif";
color:navy'>T: (585) 325-6004 </span><span style='font-size:9.0pt;font-family:
"Arial","sans-serif";color:black'>Ext. 114</span><span style='color:navy'><br>
</span><span style='font-size:9.0pt;font-family:"Arial","sans-serif";
color:navy'>F: (585) 325-6005</span><o:p></o:p></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
style='font-size:9.0pt;font-family:"Arial","sans-serif";color:black'><a
href="mailto:wbishop@pathfinder-ea.com">wbishop@pathfinder-ea.com</a></span><o:p></o:p></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
style='font-size:9.0pt;font-family:"Arial","sans-serif";color:black'><a
href="http://www.pathfinder-ea.com">www..pathfinder-ea.com</a></span><o:p></o:p></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
style='font-size:18.0pt;font-family:Webdings;color:green'>P</span><span
style='color:green'> </span><span style='font-size:7.5pt;color:green'>Please
strive to live sustainably.</span><o:p></o:p></p>
</div>
<div>
<div class=MsoNormal align=center style='text-align:center'>
<hr size=2 width="100%" align=center>
</div>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><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"'> <a
href="mailto:equest-users-bounces@lists.onebuilding.org">equest-users-bounces@lists.onebuilding.org</a>
[mailto:<a href="mailto:equest-users-bounces@lists.onebuilding.org">equest-users-bounces@lists.onebuilding.org</a>]
<b>On Behalf Of </b>Rob Hudson<br>
<b>Sent:</b> Wednesday, April 28, 2010 9:55 AM<br>
<b>To:</b> <a href="mailto:equest-users@lists.onebuilding.org">equest-users@lists.onebuilding.org</a><br>
<b>Subject:</b> [Equest-users] Demand Controlled Ventilation</span><o:p></o:p></p>
</div>
<div>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'> <o:p></o:p></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>I
am having some trouble with setting up DCV in my model. if i select DCV
in Zone Sensors for the Min OA Control Method and a min outside Air Ratio, do i
need any Zone level OA inputs?<br>
Any help or insight as to what inputs are necessary for DCV would be great!<br>
<br>
-- <br>
Rob Hudson<o:p></o:p></p>
</div>
</div>
</div>
</div>
<p class=MsoNormal><br>
<br>
<br>
-- <br>
Rob Hudson<o:p></o:p></p>
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