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<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>Otto,<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'>Thanks for the reply. The problem I see with dividing the
total OA cfm by the number of people and inputting that number into </span><span
lang=EN-US style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>OA-FLOW/PER is that this method doesn’t address the space
cfm requirement. For example, if the building is only 10% occupied at a
particular hour, then the OA supplied will be 10% occupant requirement and 10%
of space requirement, not 10% occupant and 100% area as it should be.<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US 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'>Victor<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>
<div>
<div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0cm 0cm 0cm'>
<p class=MsoNormal><b><span lang=EN-US style='font-size:10.0pt;font-family:
"Tahoma","sans-serif"'>From:</span></b><span lang=EN-US style='font-size:10.0pt;
font-family:"Tahoma","sans-serif"'> Otto Schwieterman
[mailto:oschwieterman@fhai.com] <br>
<b>Sent:</b> April 28, 2010 1:44 PM<br>
<b>To:</b> Victor Yeung<br>
<b>Subject:</b> RE: [Equest-users] Demand Controlled Ventilation<o:p></o:p></span></p>
</div>
</div>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>Victor,<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>If you do not have DCV, you must specify the amount of CFM per
room (or per SF) because if you simply put CFM/person, you are essentially
using DCV due to the occupancy change in the schedules. <o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>If you want to utilize DCV, I would calculate the total outside
air CFM required and divide the total by the number of people and input that
number into OA-FLOW/PER.<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>Otto<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p> </o:p></span></p>
<div>
<div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0cm 0cm 0cm'>
<p class=MsoNormal><b><span lang=EN-US style='font-size:10.0pt;font-family:
"Tahoma","sans-serif"'>From:</span></b><span lang=EN-US 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<o:p></o:p></span></p>
</div>
</div>
<p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>Hello all,<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 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.<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>
<table class=MsoNormalTable border=0 cellspacing=0 cellpadding=0 width=643
style='width:482.55pt;margin-left:1.45pt;border-collapse:collapse'>
<tr style='height:17.35pt'>
<td width=643 valign=top style='width:482.55pt;padding:2.9pt 1.45pt 2.9pt 1.45pt;
height:17.35pt'>
<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<o:p></o:p></span></i></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><b><span
style='font-size:9.0pt;font-family:"Arial","sans-serif";color:#1F497D;
text-transform:uppercase;letter-spacing:.2pt'><o:p></o:p></span></b></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><o:p></o:p></span></i></p>
</td>
</tr>
</table>
<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>
<div>
<div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0cm 0cm 0cm'>
<p class=MsoNormal><b><span lang=EN-US style='font-size:10.0pt;font-family:
"Tahoma","sans-serif"'>From:</span></b><span lang=EN-US 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<o:p></o:p></span></p>
</div>
</div>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal><span lang=EN-US style='font-size:10.0pt;font-family:"Arial","sans-serif";
color:navy'>Rob,<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US style='font-size:10.0pt;font-family:"Arial","sans-serif";
color:navy'><o:p> </o:p></span></p>
<p class=MsoNormal><span lang=EN-US style='font-size:10.0pt;font-family:"Arial","sans-serif";
color:navy'>You need to set up an hourly report. See attached.<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US style='font-size:10.0pt;font-family:"Arial","sans-serif";
color:navy'><o:p> </o:p></span></p>
<p class=MsoNormal><span lang=EN-US style='font-size:10.0pt;font-family:"Arial","sans-serif";
color:navy'>Bill<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US style='font-size:10.0pt;font-family:"Arial","sans-serif";
color:navy'><o:p> </o:p></span></p>
<div>
<div class=MsoNormal align=center style='text-align:center'><span lang=EN-US>
<hr size=2 width="100%" align=center>
</span></div>
<p class=MsoNormal><b><span lang=EN-US style='font-size:10.0pt;font-family:
"Tahoma","sans-serif"'>From:</span></b><span lang=EN-US 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><span
lang=EN-US><o:p></o:p></span></p>
</div>
<p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p>
<p class=MsoNormal style='margin-bottom:12.0pt'><span lang=EN-US>How can i tell
if the system is using a lower OA CFM during the less occupied times? <o:p></o:p></span></p>
<div>
<p class=MsoNormal><span lang=EN-US>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></span></p>
<div>
<div>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
lang=EN-US style='font-size:10.0pt;font-family:"Arial","sans-serif";color:navy'>Rob,</span><span
lang=EN-US><o:p></o:p></span></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
lang=EN-US style='font-size:10.0pt;font-family:"Arial","sans-serif";color:navy'> </span><span
lang=EN-US><o:p></o:p></span></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
lang=EN-US 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><span
lang=EN-US><o:p></o:p></span></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
lang=EN-US style='font-size:10.0pt;font-family:"Arial","sans-serif";color:navy'> </span><span
lang=EN-US><o:p></o:p></span></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
lang=EN-US style='font-size:10.0pt;font-family:"Arial","sans-serif";color:navy'>Regards,</span><span
lang=EN-US><o:p></o:p></span></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
lang=EN-US style='font-size:10.0pt;font-family:"Arial","sans-serif";color:navy'>Bill</span><span
lang=EN-US><o:p></o:p></span></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
lang=EN-US style='font-size:10.0pt;font-family:"Arial","sans-serif";color:navy'> </span><span
lang=EN-US><o:p></o:p></span></p>
<div>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><b><span
lang=EN-US 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
lang=EN-US style='font-size:10.0pt;font-family:"Franklin Gothic Medium Cond","sans-serif";
color:#006600'>|</span></b><b><span lang=EN-US style='font-size:10.0pt;
font-family:"Franklin Gothic Medium Cond","sans-serif";color:black'> Pathfinder
Engineers & Architects LLP</span></b><span lang=EN-US><o:p></o:p></span></p>
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lang=EN-US style='font-size:9.0pt;font-family:"Arial","sans-serif";color:black'>Mechanical
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color:navy'>Rochester, NY 14608</span><span lang=EN-US style='font-size:9.0pt;
color:navy'><br>
</span><span lang=EN-US style='font-size:9.0pt;font-family:"Arial","sans-serif";
color:navy'>T: (585) 325-6004 </span><span lang=EN-US style='font-size:9.0pt;
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color:navy'>F: (585) 325-6005</span><span lang=EN-US><o:p></o:p></span></p>
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lang=EN-US style='font-size:9.0pt;font-family:"Arial","sans-serif";color:black'><a
href="mailto:wbishop@pathfinder-ea.com" target="_blank">wbishop@pathfinder-ea.com</a></span><span
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lang=EN-US style='font-size:18.0pt;font-family:Webdings;color:green'>P</span><span
lang=EN-US style='color:green'> </span><span lang=EN-US style='font-size:7.5pt;
color:green'>Please strive to live sustainably.</span><span lang=EN-US><o:p></o:p></span></p>
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lang=EN-US style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>From:</span></b><span
lang=EN-US style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'> <a
href="mailto:equest-users-bounces@lists.onebuilding.org" target="_blank">equest-users-bounces@lists.onebuilding.org</a>
[mailto:<a href="mailto:equest-users-bounces@lists.onebuilding.org"
target="_blank">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" target="_blank">equest-users@lists.onebuilding.org</a><br>
<b>Subject:</b> [Equest-users] Demand Controlled Ventilation</span><span
lang=EN-US><o:p></o:p></span></p>
</div>
<div>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
lang=EN-US> <o:p></o:p></span></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
lang=EN-US>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
clear=all>
<br>
-- <br>
Rob Hudson<o:p></o:p></span></p>
</div>
</div>
</div>
</div>
<p class=MsoNormal><span lang=EN-US><br>
<br clear=all>
<br>
-- <br>
Rob Hudson<o:p></o:p></span></p>
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