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--></style></head><body lang="EN-US" link="blue" vlink="purple"><div class="WordSection1"><p class="MsoPlainText"><font size="2" face="Consolas"><span style="font-size:10.5pt">My first thought would be "no"...both multizone (MZS) and dual-duct (DDS) are central AHU systems that combine air flows for temperature control, I believe the intention of the System 3 tier of comparable AHUs is to have multiple single-zone AHUs in the baseline building. Multizone or dual-duct are more analogous to large central AHUs in System 7 or System 8 with many individual thermostatic zones.</span></font></p>
<p class="MsoPlainText"><font size="2" face="Consolas"><span style="font-size:10.5pt"> </span></font></p><p class="MsoPlainText"><font size="2" face="Consolas"><span style="font-size:10.5pt">Probably the single-zone with reheat would be a better option? Constant-volume reheat would also be analogous if there was only one zone. It seems like the intention is to change PSZ as the original basis, into a single-zone system served from heating and cooling plants.</span></font></p>
<p class="MsoPlainText"><font size="2" face="Consolas"><span style="font-size:10.5pt"> </span></font></p><p class="MsoPlainText"><font size="2" face="Consolas"><span style="font-size:10.5pt">David</span></font></p><p class="MsoPlainText">
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<p class="MsoNormal"><font size="1" color="black" face="Calibri"><span style="font-size:8.0pt;color:black"> </span></font></p><p class="MsoNormal"><b><font size="2" color="#1f497d" face="Calibri"><span style="font-size:11.0pt;color:#1F497D;font-weight:bold">David S. Eldridge, Jr.</span></font></b><b><font color="#244061"><span style="color:#244061;font-weight:bold">, P</span></font></b><b><font color="#1f497d"><span style="color:#1F497D;font-weight:bold">.</span></font></b><b><font color="#244061"><span style="color:#244061;font-weight:bold">E</span></font></b><b><font color="#1f497d"><span style="color:#1F497D;font-weight:bold">.</span></font></b><b><font color="#244061"><span style="color:#244061;font-weight:bold">, LEED AP BD+C, BEMP, HBDP</span></font></b></p>
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<p class="MsoNormal"><font size="1" color="#1f497d" face="Calibri"><span style="font-size:4.0pt;color:#1F497D"> </span></font></p><p class="MsoNormal"><font size="2" color="#365f91" face="Calibri"><span style="font-size:11.0pt;color:#365F91">Direct: (847) 316-92</span></font><font color="#1f497d"><span style="color:#1F497D">24</span></font><font color="#365f91"><span style="color:#365F91"> | Fax: (</span></font><font color="#1f497d"><span style="color:#1F497D">847</span></font><font color="#365f91"><span style="color:#365F91">) </span></font><font color="#1f497d"><span style="color:#1F497D">328</span></font><font color="#365f91"><span style="color:#365F91">-</span></font><font color="#1f497d"><span style="color:#1F497D">4550</span></font><font color="#365f91"><span style="color:#365F91"></span></font></p>
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<p class="MsoNormal"><font size="2" color="#1f497d" face="Calibri"><span style="font-size:10.0pt;color:#1F497D"> </span></font></p><p class="MsoNormal"><b><font size="2" color="#244061" face="Calibri"><span style="font-size:11.0pt;color:#244061;font-weight:bold">Grumman/Butkus Associates</span></font></b><font color="gray"><span style="color:gray"> </span></font><font color="#365f91"><span style="color:#365F91">| 820 Davis Street, Suite 300 | Evanston, IL 60201</span></font><font size="3" color="black"><span style="font-size:12.0pt;color:black"></span></font></p>
<p class="MsoNormal"><font size="1" color="gray" face="Calibri"><span style="font-size:9.0pt;color:gray">Energy Efficiency Consultants and Sustainable Design Engineers</span></font></p><p class="MsoNormal"><u><font size="2" color="black" face="Calibri"><span style="font-size:11.0pt;color:black"> </span></font></u></p>
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<font size="2" face="Consolas"><span style="font-size:10.5pt">> -----Original Message-----</span></font></p><p class="MsoPlainText"><font size="2" face="Consolas"><span style="font-size:10.5pt">> From: <a href="mailto:bldg-sim-bounces@lists.onebuilding.org">bldg-sim-bounces@lists.onebuilding.org</a> [mailto:<a href="mailto:bldg-sim-">bldg-sim-</a></span></font></p>
<p class="MsoPlainText"><font size="2" face="Consolas"><span style="font-size:10.5pt">> <a href="mailto:bounces@lists.onebuilding.org">bounces@lists.onebuilding.org</a>] On Behalf Of Arpan Bakshi</span></font></p><p class="MsoPlainText">
<font size="2" face="Consolas"><span style="font-size:10.5pt">> Sent: Monday, December 13, 2010 6:13 PM</span></font></p><p class="MsoPlainText"><font size="2" face="Consolas"><span style="font-size:10.5pt">> To: <a href="mailto:bldg-sim@lists.onebuilding.org">bldg-sim@lists.onebuilding.org</a></span></font></p>
<p class="MsoPlainText"><font size="2" face="Consolas"><span style="font-size:10.5pt">> Subject: [Bldg-sim] DES Sys 3</span></font></p><p class="MsoPlainText"><font size="2" face="Consolas"><span style="font-size:10.5pt">> </span></font></p>
<p class="MsoPlainText"><font size="2" face="Consolas"><span style="font-size:10.5pt">> The new Usgbc DES guidelines call for a 4 pipe CV AHU. Any thoughts on</span></font></p><p class="MsoPlainText"><font size="2" face="Consolas"><span style="font-size:10.5pt">> whether type MZS or DDS most closely reflect the system in eQUEST?</span></font></p>
<p class="MsoPlainText"><font size="2" face="Consolas"><span style="font-size:10.5pt">> </span></font></p><p class="MsoPlainText"><font size="2" face="Consolas"><span style="font-size:10.5pt">> </span></font></p><p class="MsoPlainText">
<font size="2" face="Consolas"><span style="font-size:10.5pt">> </span></font></p><p class="MsoPlainText"><font size="2" face="Consolas"><span style="font-size:10.5pt">> ----------------------------</span></font></p>
<p class="MsoPlainText"><font size="2" face="Consolas"><span style="font-size:10.5pt">> Arpan Bakshi</span></font></p><p class="MsoPlainText"><font size="2" face="Consolas"><span style="font-size:10.5pt">> YRG sustainability</span></font></p>
<p class="MsoPlainText"><font size="2" face="Consolas"><span style="font-size:10.5pt">> Direct 646.704.2880</span></font></p><p class="MsoPlainText"><font size="2" face="Consolas"><span style="font-size:10.5pt">> </span></font></p>
<p class="MsoPlainText"><font size="2" face="Consolas"><span style="font-size:10.5pt">> Sent from my iPhone</span></font></p><p class="MsoPlainText"><font size="2" face="Consolas"><span style="font-size:10.5pt"> </span></font></p>
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