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<br><br><div class="gmail_quote">On Thu, Jan 27, 2011 at 10:21 AM, Nick Caton <span dir="ltr"><<a href="mailto:ncaton@smithboucher.com">ncaton@smithboucher.com</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin: 0pt 0pt 0pt 0.8ex; border-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;">
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<p class="MsoNormal"><span style="font-size: 11pt; color: rgb(31, 73, 125);">Hi Susan!</span></p>
<p class="MsoNormal"><span style="font-size: 11pt; color: rgb(31, 73, 125);"> </span></p>
<p class="MsoNormal"><span style="font-size: 11pt; color: rgb(31, 73, 125);">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></p>
<p class="MsoNormal"><span style="font-size: 11pt; color: rgb(31, 73, 125);"> </span></p>
<p><span style="font-size: 11pt; color: rgb(31, 73, 125);"><span>-<span style="font: 7pt "Times New Roman";">
</span></span></span><span style="font-size: 11pt; color: rgb(31, 73, 125);">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></p>
<p><span style="font-size: 11pt; color: rgb(31, 73, 125);"><span>-<span style="font: 7pt "Times New Roman";">
</span></span></span><u><span style="font-size: 11pt; color: rgb(31, 73, 125);">If</span></u><span style="font-size: 11pt; color: rgb(31, 73, 125);"> 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></p>
<p><span style="font-size: 11pt; color: rgb(31, 73, 125);"><span>-<span style="font: 7pt "Times New Roman";">
</span></span></span><span style="font-size: 11pt; color: rgb(31, 73, 125);">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></p>
<p class="MsoNormal" style="margin-left: 0.25in;"><span style="font-size: 11pt; color: rgb(31, 73, 125);"> </span></p>
<p class="MsoNormal"><span style="font-size: 11pt; color: rgb(31, 73, 125);">~Nick</span></p>
<p class="MsoNormal"><span style="font-size: 11pt; color: rgb(31, 73, 125);"> </span></p>
<p class="MsoNormal"><span style="font-size: 11pt; color: rgb(31, 73, 125);"><img src="https://mail.google.com/mail/?ui=2&ik=e59d6c17d0&view=att&th=12dc815b069a7b15&attid=0.1&disp=emb&zw" alt="cid:489575314@22072009-0ABB" width="119" height="37"></span><b><span style="font-size: 11pt; color: rgb(45, 77, 94);"></span></b></p>
<p class="MsoNormal"><b><span style="font-size: 11pt; color: rgb(45, 77, 94);"> </span></b></p>
<p class="MsoNormal"><b><span style="font-size: 11pt; color: rgb(45, 77, 94);">NICK CATON, E.I.T.</span></b><b><span style="color: rgb(45, 77, 94);"></span></b></p>
<p class="MsoNormal"><span style="font-size: 7.5pt; color: rgb(204, 153, 0);">PROJECT ENGINEER</span></p>
<p class="MsoNormal"><span style="font-size: 10pt; color: rgb(45, 77, 94);">Smith & Boucher Engineers</span><span style="font-size: 7.5pt; color: rgb(204, 153, 0);"></span></p>
<p class="MsoNormal"><span style="font-size: 10pt; color: rgb(45, 77, 94);">25501 west valley parkway</span></p>
<p class="MsoNormal"><span style="font-size: 10pt; color: rgb(45, 77, 94);">olathe ks 66061</span></p>
<p class="MsoNormal"><span style="font-size: 10pt; color: rgb(45, 77, 94);">direct 913 344.0036</span></p>
<p class="MsoNormal"><span style="font-size: 10pt; color: rgb(45, 77, 94);">fax 913 345.0617</span></p>
<p class="MsoNormal"><span style="font-size: 11pt; color: rgb(31, 73, 125);"><a href="http://www.smithboucher.com" title="blocked::www.smithboucher.com" target="_blank"><span style="font-size: 10pt; color: blue;">www.smithboucher.com</span></a></span><u><span style="font-size: 10pt; color: blue;"> </span></u><span style="font-size: 11pt; color: rgb(31, 73, 125);"></span></p>
<p class="MsoNormal"><span style="font-size: 11pt; color: rgb(31, 73, 125);"> </span></p>
<div style="border-width: 1pt medium medium; border-style: solid none none; border-color: rgb(181, 196, 223) -moz-use-text-color -moz-use-text-color; padding: 3pt 0in 0in;">
<p class="MsoNormal"><b><span style="font-size: 10pt;">From:</span></b><span style="font-size: 10pt;">
<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>Susan F<br>
<b>Sent:</b> Thursday, January 27, 2011 6:11 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] DOAS in baseline</span></p>
</div><div class="im">
<p class="MsoNormal"> </p>
<p class="MsoNormal">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.</p>
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