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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'>Susan,<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'>My short answer is no, there is nothing in
Appendix G that requires you or allows you to model a DOAS system that preconditions
outside air. As you and Nick said, first use G3.1.1 for the system type. Then
refer to G3.1.2.10 to determine if exhaust air energy recovery is required.
Keep minimum outside air requirements identical between the <span class=GramE>baseline</span>
and proposed per G3.1.2.5. If the DOAS penalizes your proposed design from an
energy perspective, check Table 6.5.3.1.1B for potential adjustments to your
baseline fan pressure drop, per the note to Table G3.1.2.9.<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>
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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'>, BEMP, LEED<sup>®</sup>
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<p class=MsoNormal><font size=1 color=black face=Arial><span style='font-size:
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</span></font><font size=1 color=navy face=Arial><span style='font-size:9.0pt;
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font-family:Arial;color:black;mso-no-proof:yes'><o:p></o:p></span></font></p>
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style='mso-tab-count:1'> </span></span></font><font
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12.0pt;font-family:Arial;color:black;mso-no-proof:yes'><a
href="http://www.pathfinder-ea.com/">www.pathfinder-ea.com</a><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
style='mso-spacerun:yes'> </span></span></font><font size=1
color=green><span style='font-size:7.5pt;color:green;mso-no-proof:yes'>Sustainability
– the forest AND the trees.</span></font><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 style='mso-tab-count:1'> </span></span></font><font
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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'>
equest-users-bounces@lists.onebuilding.org
[mailto:equest-users-bounces@lists.onebuilding.org] <b><span style='font-weight:
bold'>On Behalf Of </span></b>Susan F<br>
<b><span style='font-weight:bold'>Sent:</span></b> Thursday, January 27, 2011
11:13 AM<br>
<b><span style='font-weight:bold'>To:</span></b> Nick Caton<br>
<b><span style='font-weight:bold'>Cc:</span></b> equest-users@lists.onebuilding.org<br>
<b><span style='font-weight:bold'>Subject:</span></b> Re: [Equest-users] DOAS
in baseline</span></font><o:p></o:p></p>
</div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><o:p> </o:p></span></font></p>
<p class=MsoNormal style='margin-bottom:12.0pt'><font size=3
face="Times New Roman"><span style='font-size:12.0pt'>Nick,<br>
<br>
So if my baseline is system 8 and I'm using 1 system per floor as indicated in
G.3.1.1, I don't really see an exception that would allow the DOAS. Am I
missing something that would actually allow it?<br>
<br>
Thanks,<br>
Susan<o:p></o:p></span></font></p>
<div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'>On Thu, Jan 27, 2011 at 10:21 AM, Nick Caton <<a
href="mailto:ncaton@smithboucher.com">ncaton@smithboucher.com</a>> wrote:<o:p></o:p></span></font></p>
<div link=blue vlink=purple>
<div>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><font
size=2 color="#1f497d" face="Times New Roman"><span style='font-size:11.0pt;
color:#1F497D'>Hi Susan!</span></font><o:p></o:p></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><font
size=2 color="#1f497d" face="Times New Roman"><span style='font-size:11.0pt;
color:#1F497D'> </span></font><o:p></o:p></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><font
size=2 color="#1f497d" face="Times New Roman"><span style='font-size:11.0pt;
color:#1F497D'>Whether or not a baseline model gets a separate system for a
proposed design featuring a DOAS is dependent on a few things, including how
you decided to approach modeling the DOAS in the proposed model.</span></font><o:p></o:p></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><font
size=2 color="#1f497d" face="Times New Roman"><span style='font-size:11.0pt;
color:#1F497D'> </span></font><o:p></o:p></p>
<p><font size=2 color="#1f497d" face="Times New Roman"><span style='font-size:
11.0pt;color:#1F497D'>-</span></font><font size=1 color="#1f497d"><span
style='font-size:7.0pt;color:#1F497D'>
</span></font><font size=2 color="#1f497d"><span style='font-size:11.0pt;
color:#1F497D'>A clarification first: Type and quantity of baseline
systems is determined first and foremost per Appendix G.3.1.1. You
generally have either one system per floor or one system per zone, depending on
the system type. You never start with “one system per proposed
system” except by coincidence.</span></font><o:p></o:p></p>
<p><font size=2 color="#1f497d" face="Times New Roman"><span style='font-size:
11.0pt;color:#1F497D'>-</span></font><font size=1 color="#1f497d"><span
style='font-size:7.0pt;color:#1F497D'>
</span></font><u><font size=2 color="#1f497d"><span style='font-size:11.0pt;
color:#1F497D'>If</span></font></u><font size=2 color="#1f497d"><span
style='font-size:11.0pt;color:#1F497D'> you use a dummy zone approach (not
integrating the DOAS into the proposed systems), <u>and</u> you have one
baseline system serving only the dummy zone per G.3.1.1 (or its exceptions), <u>and</u>
you have specified the ventilation requirements at that dummy zone (not
indirectly from the actual zones - using OA-FROM-SYSTEM for the proposed
systems)… <u>then</u> you’ll end up with a distinct baseline system
handling the ventilation requirements analogous to the proposed DOAS. </span></font><o:p></o:p></p>
<p><font size=2 color="#1f497d" face="Times New Roman"><span style='font-size:
11.0pt;color:#1F497D'>-</span></font><font size=1 color="#1f497d"><span
style='font-size:7.0pt;color:#1F497D'>
</span></font><font size=2 color="#1f497d"><span style='font-size:11.0pt;
color:#1F497D'>In many/most cases (partially dependant on your preferred
strategy for handling DOAS’s in your proposed models), you will not have
a dedicated baseline system handling the ventilation air. That’s
okay.</span></font><o:p></o:p></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;
margin-left:.25in'><font size=2 color="#1f497d" face="Times New Roman"><span
style='font-size:11.0pt;color:#1F497D'> </span></font><o:p></o:p></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><font
size=2 color="#1f497d" face="Times New Roman"><span style='font-size:11.0pt;
color:#1F497D'>~Nick</span></font><o:p></o:p></p>
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size=2 color="#1f497d" face="Times New Roman"><span style='font-size:11.0pt;
color:#1F497D'> </span></font><o:p></o:p></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><font
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color:#1F497D'><img border=0 width=119 height=37 id="_x0000_i1025"
src="https://mail.google.com/mail/?ui=2&ik=e59d6c17d0&view=att&th=12dc815b069a7b15&attid=0.1&disp=emb&zw"
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size=2 color="#2d4d5e" face="Times New Roman"><span style='font-size:11.0pt;
color:#2D4D5E;font-weight:bold'>NICK CATON, E.I.T.</span></font></b><o:p></o:p></p>
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color:#2D4D5E'>25501 west valley parkway</span></font><o:p></o:p></p>
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color:#2D4D5E'>direct 913 344.0036</span></font><o:p></o:p></p>
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color:#2D4D5E'>fax 913 345.0617</span></font><o:p></o:p></p>
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<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><b><font
size=2 face="Times New Roman"><span style='font-size:10.0pt;font-weight:bold'>From:</span></font></b><font
size=2><span style='font-size:10.0pt'> <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><span
style='font-weight:bold'>On Behalf Of </span></b>Susan F<br>
<b><span style='font-weight:bold'>Sent:</span></b> Thursday, January 27, 2011
6:11 AM<br>
<b><span style='font-weight:bold'>To:</span></b> <a
href="mailto:equest-users@lists.onebuilding.org" target="_blank">equest-users@lists.onebuilding.org</a><br>
<b><span style='font-weight:bold'>Subject:</span></b> [Equest-users] DOAS in
baseline</span></font><o:p></o:p></p>
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size=3 face="Times New Roman"><span style='font-size:12.0pt'> <o:p></o:p></span></font></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><font
size=3 face="Times New Roman"><span style='font-size:12.0pt'>This is not
exactly an eQUEST question but y'all have been so helpful in the past so I'm
hoping you can help here too. I'm looking for a little
clarification. It was my understanding if you had a DOAS system that
heated and cooled the outside air before delivering it to the floor mechanical
room to be combined with return air and further conditioned by the AHU in your
Proposed building that this system would NOT be modeled separately in the
Baseline. I cannot find anything in 90.1 that would regulate the DOAS
system and I'm not sure how you would model it. (I understand the dummy
zone concept for modeling DOAS but not sure that would apply to the Baseline.)<br>
<br>
Should it be separate system in the Baseline and would it be VAV or constant
volume? And if it is a separate system what section of 90.1 would you
reference for this?<br>
<br>
<br>
Thanks in advance.<o:p></o:p></span></font></p>
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