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<p class=MsoNormal><span style='color:#1F497D'>Hi James,<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'>It sounds like the storage and
workshop area may be semi-heated as defined by Section 3. I’d
recommend looking into that. If the spaces are semi-heated then they
should be modeled only with heating in the baseline case and the requirements
of Table G3.1.10 don’t apply. It’s also worth noting that if
the spaces are semi-heated they should be modeled with different envelope
values in the baseline case (based on the semi-heated in Table 5.5).<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'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'>Best Regards,<o:p></o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-family:"Times New Roman","serif";
color:black'>Gregg Liddick, EIT, LEED<sup>®</sup> AP</span><span
style='color:black'><o:p></o:p></span></p>
<p class=MsoNormal><span style='color:black'> <o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Times New Roman","serif";
color:black'>The Epsten Group, Inc.</span><span style='color:black'><o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Times New Roman","serif";
color:black'>429 Edgewood Avenue</span><span style='color:black'><o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Times New Roman","serif";
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style='color:black'><o:p></o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'> <o:p></o:p></span></p>
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<p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p>
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<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"'>
bldg-sim-bounces@lists.onebuilding.org
[mailto:bldg-sim-bounces@lists.onebuilding.org] <b>On Behalf Of </b>James
Hansen<br>
<b>Sent:</b> Wednesday, March 10, 2010 11:02 AM<br>
<b>To:</b> bldg-sim@lists.onebuilding.org<br>
<b>Subject:</b> [Bldg-sim] thoughts on App G system type for mixed use building<o:p></o:p></span></p>
</div>
</div>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>I’ve got a 92,000 square foot Industrial building that
I am modeling. If you went by Table G3.1.1A, the baseline system type
would be System 5 – Packaged VAV with reheat.<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>However, of the 92,000 square feet, approximately 16,000 sq
ft is conditioned to standard 75/72 degrees, while the remainder is a mixture
of storage, manufacturing, etc, and is heated to 55 and cooled to 120 (no
actual cooling in proposed model, but you’ve got to insert some sort of
cooling system per App G).<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>So I really have 16,000 sq ft that is fully conditioned, and
76,000 sq ft that is only partially conditioned (ie the peak thermal load
differs by 10 Btu/h-ft2). <o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>Any guesses how I configure this?<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>Do I have a packaged VAV system for the 76,000 sq ft of
shop/storage and isolate the 16,000 ft2 of real conditioned space as system 3
per the Exception to G3.1.1? <o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>Or do I have a packaged VAV system for the 16,000 ft
conditioned space and isolate the 76,000 sq ft as system 3?<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>To further complicate things, since the 76,000 sq ft is
split between storage and manufacturing, where there is theoretically an
operating schedule that differs by 40 hours or more a week between these two
different use types, do I actually just end up with ALL system 3 even though
the total net building area is above the 75,000 sq ft cutoff where we’re
supposed to go to System 5?<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>I’m confused! Any help would be appreciated.<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal><b><u>To recap:<o:p></o:p></u></b></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal><b>16,000 sq ft office, heated/cooled to 72/75<o:p></o:p></b></p>
<p class=MsoNormal><b>30,000 sq ft of storage with basically no operating hours
per week, heated/cooled to 50/120<o:p></o:p></b></p>
<p class=MsoNormal><b>36,000 sq ft of manufacturing / workshop area that is
used approximately 50 hrs a week, heated/cooled to 50/120<o:p></o:p></b></p>
<p class=MsoNormal><b><o:p> </o:p></b></p>
<p class=MsoNormal><b>Mixture of System 3 and System 5, or ALL system 3?<o:p></o:p></b></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal><b><span style='font-family:"Arial","sans-serif";color:teal'>GHT
Limited<br>
</span></b><b><span style='font-family:"Arial","sans-serif"'><ns0:PersonName><span
style='color:black'>James Hansen</span></ns0:PersonName></span><span
style='color:black'>, PE, LEED AP<o:p></o:p></span></b></p>
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