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<div class=Section1>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>Lars – zones should suffice. Appendix G lays out some
guidelines for this:<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal style='text-autospace:none'><b><span style='font-size:8.0pt'>7.
Thermal Blocks – HVAC Zones Designed<o:p></o:p></span></b></p>
<p class=MsoNormal style='text-autospace:none'><span style='font-size:8.0pt'>Where
HVAC zones are defined on HVAC design drawings, each<o:p></o:p></span></p>
<p class=MsoNormal style='text-autospace:none'><span style='font-size:8.0pt'>HVAC
zone shall be modeled as a separate <i>thermal block</i>.<o:p></o:p></span></p>
<p class=MsoNormal style='text-autospace:none'><b><span style='font-size:8.0pt'>Exception:
</span></b><span style='font-size:8.0pt'>Different HVAC zones may be combined
to create a<o:p></o:p></span></p>
<p class=MsoNormal style='text-autospace:none'><span style='font-size:8.0pt'>single
<i>thermal block </i>or identical <i>thermal blocks </i>to which multipliers<o:p></o:p></span></p>
<p class=MsoNormal style='text-autospace:none'><span style='font-size:8.0pt'>are
applied, provided that all of the following conditions are<o:p></o:p></span></p>
<p class=MsoNormal style='text-autospace:none'><span style='font-size:8.0pt'>met:<o:p></o:p></span></p>
<p class=MsoNormal style='text-autospace:none'><span style='font-size:8.0pt'>(a)
The space use classification is the same throughout the <i>thermal<o:p></o:p></i></span></p>
<p class=MsoNormal style='text-autospace:none'><i><span style='font-size:8.0pt'>block</span></i><span
style='font-size:8.0pt'>.<o:p></o:p></span></p>
<p class=MsoNormal style='text-autospace:none'><span style='font-size:8.0pt'>(b)
All HVAC zones in the <i>thermal block </i>that are adjacent to glazed<o:p></o:p></span></p>
<p class=MsoNormal style='text-autospace:none'><span style='font-size:8.0pt'>exterior
walls face the same orientation or their orientations vary by<o:p></o:p></span></p>
<p class=MsoNormal style='text-autospace:none'><span style='font-size:8.0pt'>less
than 45 degrees.<o:p></o:p></span></p>
<p class=MsoNormal style='text-autospace:none'><span style='font-size:8.0pt'>(c)
All of the zones are served by the same HVAC system or by the<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:8.0pt'>same kind of HVAC system.<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>If you want to account for some of the mass from the interior
walls, you can define the interior mass in the “contents” tab of
the space properties. <o:p></o:p></span></p>
<div>
<p class=MsoNormal style='mso-margin-top-alt:auto'><b><span style='font-family:
"Garamond","serif";color:black'>Vikram Sami,</span></b><span style='color:#1F497D'>
</span><span style='font-family:"Garamond","serif";color:black'>LEED AP</span><span
style='color:#1F497D'> <br>
</span><span style='font-family:"Garamond","serif";color:black'>Direct Phone
404-253-1466 | Direct Fax 404-253-1366</span><span style='color:#1F497D'> <o:p></o:p></span></p>
<p class=MsoNormal style='mso-margin-bottom-alt:auto'><b><span
style='font-family:"Garamond","serif";color:maroon'>L</span></b><b><span
style='font-size:10.0pt;font-family:"Garamond","serif";color:maroon'>ORD</span></b><b><span
style='font-family:"Garamond","serif";color:maroon'>, A</span></b><b><span
style='font-size:10.0pt;font-family:"Garamond","serif";color:maroon'>ECK</span></b><b><span
style='font-family:"Garamond","serif";color:maroon'> & S</span></b><b><span
style='font-size:10.0pt;font-family:"Garamond","serif";color:maroon'>ARGENT</span></b><b><span
style='font-family:"Garamond","serif";color:maroon'> A</span></b><b><span
style='font-size:10.0pt;font-family:"Garamond","serif";color:maroon'>RCHITECTURE</span></b><b><span
style='color:#1F497D'><br>
<br>
</span></b><span style='color:#1F497D'><o:p></o:p></span></p>
</div>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
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"'>
equest-users-bounces@lists.onebuilding.org
[mailto:equest-users-bounces@lists.onebuilding.org] <b>On Behalf Of </b>Lars
Fetzek<br>
<b>Sent:</b> Friday, July 24, 2009 10:53 AM<br>
<b>To:</b> equest-users@lists.onebuilding.org<br>
<b>Subject:</b> [Equest-users] Model simplification & LEED<o:p></o:p></span></p>
</div>
</div>
<p class=MsoNormal><o:p> </o:p></p>
<div>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>Fellow
eQuesters,</span><o:p></o:p></p>
</div>
<div>
<p class=MsoNormal> <o:p></o:p></p>
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<div>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>
I am modeling an office building with a few HVAC zones, each of which is
supplied through a VTU. Within each zone are many walls which, collectively,
could require the rest of my life to model. To model these walls seems a
bit more detail than physics justifies, since they generally separate rooms
within zones rather than the zones, themselves, and because all of the building
is intended to maintain the typical 75 degrees F temperature and the air will,
of course, circulate among nearby rooms.</span><o:p></o:p></p>
</div>
<div>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>
Can anyone tell me whether choosing to model only those walls that are at the
borders of HVAC zones will cause an objection by the LEED/USGBC people who will
be reviewing the building (and my model) for LEED certification?</span><o:p></o:p></p>
</div>
<div>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>
Thanks.</span><o:p></o:p></p>
</div>
<div>
<p class=MsoNormal> <o:p></o:p></p>
</div>
<div>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>Lars
Fetzek</span><o:p></o:p></p>
</div>
<div>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>Phoenix
Engineering Group</span><o:p></o:p></p>
</div>
<div>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>Tampa,
Florida</span><o:p></o:p></p>
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