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<p class=MsoNormal><span style='color:#1F497D'>The baseline model is dependent
on the hourly occupancy schedule fraction as well, even though it’s using
“Fraction of Design Flow” as the OA control method (I just tried
adjusting the baseline model and it is significantly affected by changing the
occ schedule fractions); The baseline system is a packaged VAV, that may
be why.<o:p></o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'>Table G3.1 of Appendix G states
that the schedules may be allowed to differ between the proposed and baseline
case to model nonstandard efficiency measures including DCV, provided the
revised schedules have the approval of the rating authority. I’m
not sure what the rating authority will allow, but it seems to me that in this
case using a revised schedule in the proposed case would be appropriate.<o:p></o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p>
<div>
<p class=MsoNormal><b><span style='font-size:9.0pt;font-family:"Arial","sans-serif";
color:#F79646'>Scott Janssen</span></b><span style='font-size:9.0pt;font-family:
"Arial","sans-serif";color:#F79646'> </span><span style='font-size:8.0pt;
font-family:"Arial","sans-serif";color:#7F7F7F'>EMIT, LEED® AP </span><span
style='font-size:9.0pt;font-family:"Arial","sans-serif";color:#7F7F7F'><o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:8.0pt;font-family:"Arial","sans-serif";
color:#7F7F7F'>Energy Analyst<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:9.0pt;font-family:"Arial","sans-serif";
color:#7F7F7F'><o:p> </o:p></span></p>
<p class=MsoNormal><b><span style='font-size:8.0pt;font-family:"Arial","sans-serif";
color:#7F7F7F'>EYP Energy <o:p></o:p></span></b></p>
<p class=MsoNormal><span style='font-size:8.0pt;font-family:"Arial","sans-serif";
color:#7F7F7F'>NanoFab East, Suite 1400 </span><span style='font-size:8.0pt;
font-family:"Arial","sans-serif";color:#F79646'>/</span><span style='font-size:
8.0pt;font-family:"Arial","sans-serif";color:#7F7F7F'> 257 Fuller Road </span><span
style='font-size:8.0pt;font-family:"Arial","sans-serif";color:#F79646'>/</span><span
style='font-size:8.0pt;font-family:"Arial","sans-serif";color:#7F7F7F'> Albany,
NY 12203<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:8.0pt;font-family:"Arial","sans-serif";
color:#7F7F7F'>T (518) 438 - 1497 </span><span style='font-size:8.0pt;
font-family:"Arial","sans-serif";color:#F79646'>/</span><span style='font-size:
8.0pt;font-family:"Arial","sans-serif";color:#7F7F7F'> C (518) 421 - 1267 </span><span
style='font-size:8.0pt;font-family:"Arial","sans-serif";color:#F79646'>/</span><span
style='font-size:8.0pt;font-family:"Arial","sans-serif";color:#7F7F7F'> <a
href="http://www.eypae.com"><span style='color:#7F7F7F'>eypae.com</span></a><o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:8.0pt;font-family:"Arial","sans-serif";
color:#7F7F7F'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:8.0pt;font-family:"Arial","sans-serif";
color:#F79646'>/</span><span style='font-size:8.0pt;font-family:"Arial","sans-serif";
color:#7F7F7F'> 2009 Best Firm to Work For<o:p></o:p></span></p>
</div>
<p class=MsoNormal><span style='font-size:12.0pt;font-family:"Times New Roman","serif";
color:#7F7F7F'> </span><span style='color:#1F497D'><o:p></o:p></span></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> Wednesday, August 11, 2010 10:17 AM<br>
<b>To:</b> Scott Janssen<br>
<b>Cc:</b> equest-users@lists.onebuilding.org<br>
<b>Subject:</b> RE: [Equest-users] Demand Control Ventilation - LEED Model<o:p></o:p></span></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'>Scott,<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif";
color:navy'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif";
color:navy'>The baseline model ventilation will be constant during occupied
hours and equal to peak occupancy x cfm/person when using “Fraction of
Design Flow” as the OA control method. The proposed model hourly
ventilation rate will vary and will be equal to peak occupancy x cfm/person x
hourly occupancy schedule fraction.<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif";
color:navy'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif";
color:navy'>Bill<o:p></o:p></span></p>
<p class=MsoNormal><span 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
style='font-size:12.0pt;font-family:"Times New Roman","serif"'>
<hr size=2 width="100%" align=center>
</span></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"'> Scott Janssen
[mailto:sjanssen@eypae.com] <br>
<b>Sent:</b> Wednesday, August 11, 2010 10:03 AM<br>
<b>To:</b> Bishop, Bill<br>
<b>Cc:</b> equest-users@lists.onebuilding.org<br>
<b>Subject:</b> RE: [Equest-users] Demand Control Ventilation - LEED Model</span><span
style='font-size:12.0pt;font-family:"Times New Roman","serif"'><o:p></o:p></span></p>
</div>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal><span style='color:#1F497D'>Bill,<o:p></o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'>Thanks for the response.
I’m a bit confused as to how that would reduce ventilation in the
proposed case though if everything is the same between the two models (same
fractions in occ schedules, same space peak occ, same zone level OA cfm/person).
Am I missing something?<o:p></o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'>Thanks, <o:p></o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p>
<div>
<p class=MsoNormal><b><span style='font-size:9.0pt;font-family:"Arial","sans-serif";
color:#F79646'>Scott Janssen</span></b><span style='font-size:9.0pt;font-family:
"Arial","sans-serif";color:#F79646'> </span><span style='font-size:8.0pt;
font-family:"Arial","sans-serif";color:#7F7F7F'>EMIT, LEED® AP </span><span
style='font-size:9.0pt;font-family:"Arial","sans-serif";color:#7F7F7F'><o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:8.0pt;font-family:"Arial","sans-serif";
color:#7F7F7F'>Energy Analyst<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:9.0pt;font-family:"Arial","sans-serif";
color:#7F7F7F'><o:p> </o:p></span></p>
<p class=MsoNormal><b><span style='font-size:8.0pt;font-family:"Arial","sans-serif";
color:#7F7F7F'>EYP Energy <o:p></o:p></span></b></p>
<p class=MsoNormal><span style='font-size:8.0pt;font-family:"Arial","sans-serif";
color:#7F7F7F'>NanoFab East, Suite 1400 </span><span style='font-size:8.0pt;
font-family:"Arial","sans-serif";color:#F79646'>/</span><span style='font-size:
8.0pt;font-family:"Arial","sans-serif";color:#7F7F7F'> 257 Fuller Road </span><span
style='font-size:8.0pt;font-family:"Arial","sans-serif";color:#F79646'>/</span><span
style='font-size:8.0pt;font-family:"Arial","sans-serif";color:#7F7F7F'> Albany,
NY 12203<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:8.0pt;font-family:"Arial","sans-serif";
color:#7F7F7F'>T (518) 438 - 1497 </span><span style='font-size:8.0pt;
font-family:"Arial","sans-serif";color:#F79646'>/</span><span style='font-size:
8.0pt;font-family:"Arial","sans-serif";color:#7F7F7F'> C (518) 421 - 1267 </span><span
style='font-size:8.0pt;font-family:"Arial","sans-serif";color:#F79646'>/</span><span
style='font-size:8.0pt;font-family:"Arial","sans-serif";color:#7F7F7F'> <a
href="http://www.eypae.com"><span style='color:#7F7F7F'>eypae.com</span></a><o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:8.0pt;font-family:"Arial","sans-serif";
color:#7F7F7F'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:8.0pt;font-family:"Arial","sans-serif";
color:#F79646'>/</span><span style='font-size:8.0pt;font-family:"Arial","sans-serif";
color:#7F7F7F'> 2009 Best Firm to Work For<o:p></o:p></span></p>
</div>
<p class=MsoNormal><span style='font-size:12.0pt;font-family:"Times New Roman","serif";
color:#7F7F7F'> </span><span style='color:#1F497D'><o:p></o:p></span></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> Wednesday, August 11, 2010 9:15 AM<br>
<b>To:</b> Scott Janssen<br>
<b>Cc:</b> equest-users@lists.onebuilding.org<br>
<b>Subject:</b> RE: [Equest-users] Demand Control Ventilation - LEED Model<o:p></o:p></span></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'>Scott,<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif";
color:navy'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif";
color:navy'>Check the equest-users archives since this has been discussed many
times. You are on the right track.<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif";
color:navy'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif";
color:navy'>You have to use the same occupancy schedule(s) for your proposed
and baseline models. Enter the peak occupancy for your space and then
create/adjust your occupancy schedule so that it fluctuates somewhere between 0
and 100% during occupied hours, according to how the space is actually used. If
you set your zone-level OA with the same cfm/person value in both the proposed
and baseline, the proposed will decrease the ventilation during occupied hours
based on the fraction of occupancy in the schedule. Make sure you are not
“gaming the system” – your peak occupancy and cfm/person
values that you use should be consistent with the actual mechanical design peak
ventilation rate.<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif";
color:navy'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif";
color:navy'>Regards,<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif";
color:navy'>Bill<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif";
color:navy'><o:p> </o:p></span></p>
<div>
<p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Franklin Gothic Medium Cond","sans-serif";
color:black'>William Bishop, PE, 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<o:p></o:p></span></b></p>
<p class=MsoNormal><span style='font-size:9.0pt;font-family:"Arial","sans-serif";
color:black'>Mechanical Engineer<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:5.0pt;font-family:"Arial","sans-serif";
color:black'><o:p> </o:p></span></p>
<p class=MsoNormal><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='font-size:9.0pt;
color:navy'><br>
</span><span style='font-size:9.0pt;font-family:"Arial","sans-serif";
color:navy'>F: (585) 325-6005</span><span style='font-size:9.0pt;font-family:
"Arial","sans-serif";color:black'><o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:9.0pt;font-family:"Arial","sans-serif";
color:black'>wbishop@pathfinder-ea.com<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:9.0pt;font-family:"Arial","sans-serif";
color:black'>www.pathfinder-ea.com</span><span style='font-size:12.0pt;
font-family:"Times New Roman","serif";color:navy'><o:p></o:p></span></p>
<p class=MsoNormal><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'>Sustainability – less is more.</span><span
style='color:green'><o:p></o:p></span></p>
</div>
<div>
<div class=MsoNormal align=center style='text-align:center'><span
style='font-size:12.0pt;font-family:"Times New Roman","serif"'>
<hr size=2 width="100%" align=center>
</span></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"'>
equest-users-bounces@lists.onebuilding.org
[mailto:equest-users-bounces@lists.onebuilding.org] <b>On Behalf Of </b>Scott
Janssen<br>
<b>Sent:</b> Wednesday, August 11, 2010 9:00 AM<br>
<b>To:</b> equest-users@lists.onebuilding.org<br>
<b>Subject:</b> [Equest-users] Demand Control Ventilation - LEED Model</span><span
style='font-size:12.0pt;font-family:"Times New Roman","serif"'><o:p></o:p></span></p>
</div>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>My question is in regards to setting up the design case
model to reflect demand control ventilation. So far, I’ve set the
min OA schedules for the zones to 0 during unoccupied hours to limit OA and set
the HVAC system min OA method to DCV return, and this has shown some
savings. The occupied hours for some of the spaces are roughly 12
hrs/day, but the spaces will be occupied roughly 1/3 of the time during those
hours. As this project is going for LEED, is it acceptable to adjust the
occupancy schedules in any way to account for the effectiveness of the DCV
system when these spaces are “unoccupied” during occupied hours, or
does anyone have any suggestions for other changes I can make to the design
case model? This is really an ideal scenario for DCV as the occupied
schedule for the building is long (at least 12 hrs per day), but the actual occupancy
of the building will be sporadic and I’m concerned that the model
isn’t reflecting the full-effectiveness of the DCV system.<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>Thanks in advance, <o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal><b><span style='font-size:9.0pt;font-family:"Arial","sans-serif";
color:#F79646'>Scott Janssen</span></b><span style='font-size:9.0pt;font-family:
"Arial","sans-serif";color:#F79646'> </span><span style='font-size:8.0pt;
font-family:"Arial","sans-serif";color:#7F7F7F'>EMIT, LEED® AP </span><span
style='font-size:9.0pt;font-family:"Arial","sans-serif";color:#7F7F7F'><o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:8.0pt;font-family:"Arial","sans-serif";
color:#7F7F7F'>Energy Analyst<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:9.0pt;font-family:"Arial","sans-serif";
color:#7F7F7F'><o:p> </o:p></span></p>
<p class=MsoNormal><b><span style='font-size:8.0pt;font-family:"Arial","sans-serif";
color:#7F7F7F'>EYP Energy <o:p></o:p></span></b></p>
<p class=MsoNormal><span style='font-size:8.0pt;font-family:"Arial","sans-serif";
color:#7F7F7F'>NanoFab East, Suite 1400 </span><span style='font-size:8.0pt;
font-family:"Arial","sans-serif";color:#F79646'>/</span><span style='font-size:
8.0pt;font-family:"Arial","sans-serif";color:#7F7F7F'> 257 Fuller Road </span><span
style='font-size:8.0pt;font-family:"Arial","sans-serif";color:#F79646'>/</span><span
style='font-size:8.0pt;font-family:"Arial","sans-serif";color:#7F7F7F'> Albany,
NY 12203<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:8.0pt;font-family:"Arial","sans-serif";
color:#7F7F7F'>T (518) 438 - 1497 </span><span style='font-size:8.0pt;
font-family:"Arial","sans-serif";color:#F79646'>/</span><span style='font-size:
8.0pt;font-family:"Arial","sans-serif";color:#7F7F7F'> C (518) 421 - 1267 </span><span
style='font-size:8.0pt;font-family:"Arial","sans-serif";color:#F79646'>/</span><span
style='font-size:8.0pt;font-family:"Arial","sans-serif";color:#7F7F7F'> <a
href="http://www.eypae.com"><span style='color:#7F7F7F'>eypae.com</span></a><o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:8.0pt;font-family:"Arial","sans-serif";
color:#7F7F7F'><o:p> </o:p></span></p>
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color:#F79646'>/</span><span style='font-size:8.0pt;font-family:"Arial","sans-serif";
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