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<title>DCV per ASHRAE 62.1 in eQuest</title>
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<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>Dan,<o:p></o:p></span></font></p>

<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>

<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>[I copied the <span class=SpellE>equest</span>-users
instead of bldg-<span class=SpellE>sim</span>.]<o:p></o:p></span></font></p>

<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>

<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>You need to enter zone-level OA as
OA-FLOW/PER and/or OA-FLOW/AREA. The OA flow/per (person) is what will vary the
OA on an hourly basis, based on your occupancy schedule(s). (Hourly OA = (# of
people) * OA-FLOW/PER * (% occupancy in schedule)). In order to turn OA off
during unoccupied hours, I create a MIN-AIR-SCH, coinciding with the fan
schedule, set to zero when fan is off (or night cycling) and -999 when fan is
on. The hourly OA can be verified by creating a new hourly report for the
system to track total system supply air flow rate and ratio of outside air to
total supply air.<o:p></o:p></span></font></p>

<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>

<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>Regards,<o:p></o:p></span></font></p>

<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>Bill<o:p></o:p></span></font></p>

<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>

<div>

<p class=MsoNormal><b style='mso-bidi-font-weight:normal'><font size=2
color=black face="Franklin Gothic Medium Cond"><span style='font-size:10.0pt;
font-family:"Franklin Gothic Medium Cond";color:black;font-weight:bold;
mso-bidi-font-weight:normal;mso-no-proof:yes'>William Bishop, EIT, BEMP, LEED<sup>®</sup>
AP </span></font></b><b style='mso-bidi-font-weight:normal'><font size=2
color="#006600" face="Franklin Gothic Medium Cond"><span style='font-size:10.0pt;
font-family:"Franklin Gothic Medium Cond";color:#006600;font-weight:bold;
mso-bidi-font-weight:normal;mso-no-proof:yes'>|</span></font></b><b
style='mso-bidi-font-weight:normal'><font size=2 color=black
face="Franklin Gothic Medium Cond"><span style='font-size:10.0pt;font-family:
"Franklin Gothic Medium Cond";color:black;font-weight:bold;mso-bidi-font-weight:
normal;mso-no-proof:yes'> </span></font></b><b style='mso-bidi-font-weight:
normal'><font size=2 color=black face="Franklin Gothic Medium Cond"><span
style='font-size:10.0pt;mso-bidi-font-size:12.0pt;font-family:"Franklin Gothic Medium Cond";
color:black;font-weight:bold;mso-bidi-font-weight:normal;mso-no-proof:yes'>Pathfinder
Engineers & Architects LLP</span></font></b><b><font size=2 color=black
face="Franklin Gothic Medium Cond"><span style='font-size:10.0pt;font-family:
"Franklin Gothic Medium Cond";color:black;font-weight:bold;mso-no-proof:yes'><o:p></o:p></span></font></b></p>

<p class=MsoNormal><font size=1 color=black face=Arial><span style='font-size:
9.0pt;font-family:Arial;color:black;mso-no-proof:yes'>Mechanical Engineer<o:p></o:p></span></font></p>

<p class=MsoNormal><font size=1 color=black face=Arial><span style='font-size:
5.0pt;font-family:Arial;color:black;mso-no-proof:yes'><o:p> </o:p></span></font></p>

<p class=MsoNormal><st1:address
style="BACKGROUND-IMAGE: url(res://ietag.dll/#34/#1001); BACKGROUND-REPEAT: repeat-x; BACKGROUND-POSITION: left bottom"
tabIndex="0" w:st="on"><st1:Street w:st="on"><font size=1 color=navy
  face=Arial><span style='font-size:9.0pt;font-family:Arial;color:navy;
  mso-no-proof:yes'>134 South Fitzhugh Street</span></font></st1:Street><font
 size=1 color=navy><span style='font-size:9.0pt;color:navy;mso-no-proof:yes'><br>
 </span></font><st1:City w:st="on"><font size=1 color=navy face=Arial><span
  style='font-size:9.0pt;font-family:Arial;color:navy;mso-no-proof:yes'>Rochester</span></font></st1:City><font
 size=1 color=navy face=Arial><span style='font-size:9.0pt;font-family:Arial;
 color:navy;mso-no-proof:yes'>, <st1:State w:st="on">NY</st1:State> <st1:PostalCode
 w:st="on">14608</st1:PostalCode></span></font></st1:address><font size=1
color=navy><span style='font-size:9.0pt;color:navy;mso-no-proof:yes'><br>
</span></font><font size=1 color=navy face=Arial><span style='font-size:9.0pt;
font-family:Arial;color:navy;mso-no-proof:yes'>T: (585) 325-6004 </span></font><font
size=1 color=black face=Arial><span style='font-size:9.0pt;font-family:Arial;
color:black;mso-no-proof:yes'>Ext. 114</span></font><font size=1 color=navy><span
style='font-size:9.0pt;color:navy;mso-no-proof:yes'><br>
</span></font><font size=1 color=navy face=Arial><span style='font-size:9.0pt;
font-family:Arial;color:navy;mso-no-proof:yes'>F: (585) 325-6005</span></font><font
size=1 color=black face=Arial><span style='font-size:9.0pt;mso-bidi-font-size:
12.0pt;font-family:Arial;color:black;mso-no-proof:yes'><o:p></o:p></span></font></p>

<p class=MsoNormal><font size=1 color=black face=Arial><span style='font-size:
9.0pt;font-family:Arial;color:black;mso-no-proof:yes'>wbishop@pathfinder-ea.com<o:p></o:p></span></font></p>

<p class=MsoNormal><font size=1 color=black face=Arial><span style='font-size:
9.0pt;mso-bidi-font-size:12.0pt;font-family:Arial;color:black;mso-no-proof:
yes'>www.pathfinder-ea.com</span></font><font color=navy><span
style='color:navy;mso-no-proof:yes'><o:p></o:p></span></font></p>

<p class=MsoNormal><font size=5 color=green face=Webdings><span
style='font-size:18.0pt;font-family:Webdings;mso-bidi-font-family:Webdings;
color:green;mso-no-proof:yes'>P</span></font><font color=green><span
style='color:green;mso-no-proof:yes'> </span></font><font size=1 color=green><span
style='font-size:7.5pt;color:green;mso-no-proof:yes'>May is National Bike
Month. Bike to Work Day May 21<sup>st</sup>.</span></font><font color=green><span
style='color:green'><o:p></o:p></span></font></p>

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<p class=MsoNormal><b><font size=2 face=Tahoma><span style='font-size:10.0pt;
font-family:Tahoma;font-weight:bold'>From:</span></font></b><font size=2
face=Tahoma><span style='font-size:10.0pt;font-family:Tahoma'>
bldg-sim-bounces@lists.onebuilding.org
[mailto:bldg-sim-bounces@lists.onebuilding.org] <b><span style='font-weight:
bold'>On Behalf Of </span></b>Dan Coutin<br>
<b><span style='font-weight:bold'>Sent:</span></b> Friday, May 28, 2010 12:02
PM<br>
<b><span style='font-weight:bold'>To:</span></b> bldg-sim@lists.onebuilding.org<br>
<b><span style='font-weight:bold'>Subject:</span></b> [Bldg-sim] DCV per ASHRAE
62.1 in eQuest</span></font><o:p></o:p></p>

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<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><o:p> </o:p></span></font></p>

<p><font size=2 face=Arial><span style='font-size:10.0pt;font-family:Arial'>Using
eQuest 3.63, I am modeling a school building with a high ventilation
requirement. The schedule indicates a minimum OA cfm and employs DCV that<u>
adds</u> OA per occupant in a manner similar to ASHRAE 62.1:2004.</span></font><o:p></o:p></p>

<p><font size=2 face=Arial><span style='font-size:10.0pt;font-family:Arial'>Can
someone informed, please suggest</span></font> <o:p></o:p></p>

<p><font size=2 face=Arial><span style='font-size:10.0pt;font-family:Arial'>a)
how this may be best input in eQuest, and:</span></font> <br>
<font size=2 face=Arial><span style='font-size:10.0pt;font-family:Arial'>b)
importantly, how it may be verified in the output. </span></font><o:p></o:p></p>

<p><font size=2 face=Arial><span style='font-size:10.0pt;font-family:Arial'>As
in real life the amount of ventilation (used/modeled) has a considerable energy
impact and needs to be particularly accurate.</span></font><o:p></o:p></p>

<p><font size=2 face=Arial><span style='font-size:10.0pt;font-family:Arial'>I
see the DCV Zone sensors options, and have read the zone/system ventilation
help, but I find the help descriptions somewhat ambiguous.</span></font><o:p></o:p></p>

<p><font size=2 face=Arial><span style='font-size:10.0pt;font-family:Arial'>In
this example the system is constant volume roof top units with heat recovery.
Unoccupied control is cycling fans with no ventilation.</span></font><o:p></o:p></p>

<p><font size=2 face=Arial><span style='font-size:10.0pt;font-family:Arial'>Thanks</span></font>
<br>
<b><font size=2 face=Arial><span style='font-size:10.0pt;font-family:Arial;
font-weight:bold'>Dan Coutin,</span></font></b> <font size=2 face=Arial><span
style='font-size:10.0pt;font-family:Arial'>Erdman Anthony, <st1:place w:st="on"><st1:City
 w:st="on">Albany</st1:City>, <st1:State w:st="on">NY</st1:State></st1:place>.</span></font>
<br>
coutind@erdmananthony.com <o:p></o:p></p>

<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><o:p> </o:p></span></font></p>

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