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<p class="MsoNormal">Hi Brian,<o:p></o:p></p>
<p class="MsoNormal">Congrats on giving eQUEST a try! It runs quickly and has an extensive help library which helps make it easy to learn.<o:p></o:p></p>
<ol style="margin-top:0in" start="1" type="1">
<li class="MsoListParagraph" style="margin-left:0in;mso-list:l1 level1 lfo3">I’m not sure about duct losses in the residential systems. It might depend on which system type (RESVVT or RESYS) or DOE2.2/2.3 version you are using. My guess is that duct leakage
options would be grayed out if the system type does not support some aspect of duct losses. The RESYS system is old and does not allow outside air for example.<o:p></o:p></li><li class="MsoListParagraph" style="margin-left:0in;mso-list:l1 level1 lfo3">The LS and other loads reports are based on the LOADS simulation which uses the building geometry and SPACE inputs. LOADS does not include ventilation requirements and does not depend
on the specific system design. (I believe the loads reports will stay the same when you change system types and other system inputs.) You need to look at SYSTEM reports (SS-A, SS-F, SS-G etc.) for impacts of duct losses. This may have changed when running
in DOE-2.3 mode but I’m not sure.<o:p></o:p></li></ol>
<p class="MsoNormal">Regards,<o:p></o:p></p>
<p class="MsoNormal">~Bill<o:p></o:p></p>
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<b><span style="font-size:10.0pt;font-family:"Franklin Gothic Medium",sans-serif;color:black">William Bishop, PE, BEMP, BEAP, CEM, LEED AP<o:p></o:p></span></b></p>
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<b><span style="font-size:9.0pt;font-family:"Arial",sans-serif;color:black">Senior Energy Engineer<o:p></o:p></span></b></p>
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<span style="font-size:9.0pt;font-family:"Arial",sans-serif;color:#1F497D">134 South Fitzhugh Street<o:p></o:p></span></p>
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<b>From:</b> Equest-users <equest-users-bounces@lists.onebuilding.org> <b>On Behalf Of
</b>WIGGINS, BRIAN via Equest-users<br>
<b>Sent:</b> Wednesday, November 28, 2018 9:49 AM<br>
<b>To:</b> equest-users@lists.onebuilding.org<br>
<b>Subject:</b> [Equest-users] Equest Duct Losses Question<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Hello everyone,<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">I have a question. I want to look at a scenario of energy consumption and costs for ductwork thermal and leakage losses outside the thermal envelope as compared to the ductwork being inside the thermal envelope. Below is the key information.
I saw under the detailed data edit mode, the option to imput duct losses information under the air side tab. My understanding is that you can estimate a leakage rate based on the percentage of air lost in the duct system. Also, the thermal losses can be
estimated either by the UA of the ductwork or the temperature difference between the supply temp and air distribution supply temp to the space. I opted to choose the UA option. Below is the information that I input.
<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<table class="MsoNormalTable" border="0" cellspacing="0" cellpadding="0" width="419" style="width:314.0pt;margin-left:-.15pt;border-collapse:collapse">
<tbody>
<tr style="height:15.0pt">
<td width="263" nowrap="" valign="bottom" style="width:197.0pt;border:solid windowtext 1.0pt;background:#E7E6E6;padding:0in 5.4pt 0in 5.4pt;height:15.0pt">
<p class="MsoNormal" style="margin-bottom:0in;margin-bottom:.0001pt;line-height:normal">
<b><span style="color:black">Description of Value<o:p></o:p></span></b></p>
</td>
<td width="75" nowrap="" valign="bottom" style="width:56.0pt;border:solid windowtext 1.0pt;border-left:none;background:#E7E6E6;padding:0in 5.4pt 0in 5.4pt;height:15.0pt">
<p class="MsoNormal" align="center" style="margin-bottom:0in;margin-bottom:.0001pt;text-align:center;line-height:normal">
<b><span style="color:black">Value<o:p></o:p></span></b></p>
</td>
<td width="81" nowrap="" valign="bottom" style="width:61.0pt;border:solid windowtext 1.0pt;border-left:none;background:#E7E6E6;padding:0in 5.4pt 0in 5.4pt;height:15.0pt">
<p class="MsoNormal" style="margin-bottom:0in;margin-bottom:.0001pt;line-height:normal">
<b><span style="color:black">Units<o:p></o:p></span></b></p>
</td>
</tr>
<tr style="height:15.0pt">
<td width="263" nowrap="" valign="bottom" style="width:197.0pt;border:solid windowtext 1.0pt;border-top:none;padding:0in 5.4pt 0in 5.4pt;height:15.0pt">
<p class="MsoNormal" style="margin-bottom:0in;margin-bottom:.0001pt;line-height:normal">
<span style="color:black">Ductwork R Value<o:p></o:p></span></p>
</td>
<td width="75" nowrap="" valign="bottom" style="width:56.0pt;border-top:none;border-left:none;border-bottom:solid windowtext 1.0pt;border-right:solid windowtext 1.0pt;padding:0in 5.4pt 0in 5.4pt;height:15.0pt">
<p class="MsoNormal" align="center" style="margin-bottom:0in;margin-bottom:.0001pt;text-align:center;line-height:normal">
<span style="color:black">4.7<o:p></o:p></span></p>
</td>
<td width="81" nowrap="" valign="bottom" style="width:61.0pt;border-top:none;border-left:none;border-bottom:solid windowtext 1.0pt;border-right:solid windowtext 1.0pt;padding:0in 5.4pt 0in 5.4pt;height:15.0pt">
<p class="MsoNormal" style="margin-bottom:0in;margin-bottom:.0001pt;line-height:normal">
<span style="font-size:10.0pt;font-family:"Arial",sans-serif;color:#222222">ft</span><sup><span style="font-size:7.0pt;font-family:"Arial",sans-serif;color:#222222">2</span></sup><span style="font-size:10.0pt;font-family:"Arial",sans-serif;color:#222222">·°F·h/BTU<o:p></o:p></span></p>
</td>
</tr>
<tr style="height:15.0pt">
<td width="263" nowrap="" valign="bottom" style="width:197.0pt;border:solid windowtext 1.0pt;border-top:none;padding:0in 5.4pt 0in 5.4pt;height:15.0pt">
<p class="MsoNormal" style="margin-bottom:0in;margin-bottom:.0001pt;line-height:normal">
<span style="color:black">Ductwork Leakage Rate<o:p></o:p></span></p>
</td>
<td width="75" nowrap="" valign="bottom" style="width:56.0pt;border-top:none;border-left:none;border-bottom:solid windowtext 1.0pt;border-right:solid windowtext 1.0pt;padding:0in 5.4pt 0in 5.4pt;height:15.0pt">
<p class="MsoNormal" align="center" style="margin-bottom:0in;margin-bottom:.0001pt;text-align:center;line-height:normal">
<span style="color:black">0.15<o:p></o:p></span></p>
</td>
<td width="81" nowrap="" valign="bottom" style="width:61.0pt;border-top:none;border-left:none;border-bottom:solid windowtext 1.0pt;border-right:solid windowtext 1.0pt;padding:0in 5.4pt 0in 5.4pt;height:15.0pt">
<p class="MsoNormal" style="margin-bottom:0in;margin-bottom:.0001pt;line-height:normal">
<span style="color:black">Percent<o:p></o:p></span></p>
</td>
</tr>
<tr style="height:15.0pt">
<td width="263" nowrap="" valign="bottom" style="width:197.0pt;border:solid windowtext 1.0pt;border-top:none;padding:0in 5.4pt 0in 5.4pt;height:15.0pt">
<p class="MsoNormal" style="margin-bottom:0in;margin-bottom:.0001pt;line-height:normal">
<span style="color:black">Estimated Supply Ductwork Surface Area<o:p></o:p></span></p>
</td>
<td width="75" nowrap="" valign="bottom" style="width:56.0pt;border-top:none;border-left:none;border-bottom:solid windowtext 1.0pt;border-right:solid windowtext 1.0pt;padding:0in 5.4pt 0in 5.4pt;height:15.0pt">
<p class="MsoNormal" align="center" style="margin-bottom:0in;margin-bottom:.0001pt;text-align:center;line-height:normal">
<span style="color:black"> 1,440 <o:p></o:p></span></p>
</td>
<td width="81" nowrap="" valign="bottom" style="width:61.0pt;border-top:none;border-left:none;border-bottom:solid windowtext 1.0pt;border-right:solid windowtext 1.0pt;padding:0in 5.4pt 0in 5.4pt;height:15.0pt">
<p class="MsoNormal" style="margin-bottom:0in;margin-bottom:.0001pt;line-height:normal">
<span style="color:black">Square Feet<o:p></o:p></span></p>
</td>
</tr>
<tr style="height:15.0pt">
<td width="263" nowrap="" valign="bottom" style="width:197.0pt;border:solid windowtext 1.0pt;border-top:none;padding:0in 5.4pt 0in 5.4pt;height:15.0pt">
<p class="MsoNormal" style="margin-bottom:0in;margin-bottom:.0001pt;line-height:normal">
<span style="color:black">New Unit Rating<o:p></o:p></span></p>
</td>
<td width="75" nowrap="" valign="bottom" style="width:56.0pt;border-top:none;border-left:none;border-bottom:solid windowtext 1.0pt;border-right:solid windowtext 1.0pt;padding:0in 5.4pt 0in 5.4pt;height:15.0pt">
<p class="MsoNormal" align="center" style="margin-bottom:0in;margin-bottom:.0001pt;text-align:center;line-height:normal">
<span style="color:black">15<o:p></o:p></span></p>
</td>
<td width="81" nowrap="" valign="bottom" style="width:61.0pt;border-top:none;border-left:none;border-bottom:solid windowtext 1.0pt;border-right:solid windowtext 1.0pt;padding:0in 5.4pt 0in 5.4pt;height:15.0pt">
<p class="MsoNormal" style="margin-bottom:0in;margin-bottom:.0001pt;line-height:normal">
<span style="color:black">SEER<o:p></o:p></span></p>
</td>
</tr>
<tr style="height:15.0pt">
<td width="263" nowrap="" valign="bottom" style="width:197.0pt;border:solid windowtext 1.0pt;border-top:none;padding:0in 5.4pt 0in 5.4pt;height:15.0pt">
<p class="MsoNormal" style="margin-bottom:0in;margin-bottom:.0001pt;line-height:normal">
<span style="color:black">Return Duct Surface Area<o:p></o:p></span></p>
</td>
<td width="75" nowrap="" valign="bottom" style="width:56.0pt;border-top:none;border-left:none;border-bottom:solid windowtext 1.0pt;border-right:solid windowtext 1.0pt;padding:0in 5.4pt 0in 5.4pt;height:15.0pt">
<p class="MsoNormal" align="center" style="margin-bottom:0in;margin-bottom:.0001pt;text-align:center;line-height:normal">
<span style="color:black">240<o:p></o:p></span></p>
</td>
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<p class="MsoNormal" style="margin-bottom:0in;margin-bottom:.0001pt;line-height:normal">
<span style="color:black">Square Feet<o:p></o:p></span></p>
</td>
</tr>
<tr style="height:15.0pt">
<td width="263" nowrap="" valign="bottom" style="width:197.0pt;border:solid windowtext 1.0pt;border-top:none;padding:0in 5.4pt 0in 5.4pt;height:15.0pt">
<p class="MsoNormal" style="margin-bottom:0in;margin-bottom:.0001pt;line-height:normal">
<span style="color:black"> <o:p></o:p></span></p>
</td>
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<p class="MsoNormal" align="center" style="margin-bottom:0in;margin-bottom:.0001pt;text-align:center;line-height:normal">
<span style="color:black"> <o:p></o:p></span></p>
</td>
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<p class="MsoNormal" style="margin-bottom:0in;margin-bottom:.0001pt;line-height:normal">
<span style="color:black"> <o:p></o:p></span></p>
</td>
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<tr style="height:15.0pt">
<td width="263" nowrap="" valign="bottom" style="width:197.0pt;border:solid windowtext 1.0pt;border-top:none;padding:0in 5.4pt 0in 5.4pt;height:15.0pt">
<p class="MsoNormal" style="margin-bottom:0in;margin-bottom:.0001pt;line-height:normal">
<span style="color:black">UA for Supply Duct<o:p></o:p></span></p>
</td>
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<p class="MsoNormal" align="center" style="margin-bottom:0in;margin-bottom:.0001pt;text-align:center;line-height:normal">
<span style="color:black"> 306 <o:p></o:p></span></p>
</td>
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<p class="MsoNormal" style="margin-bottom:0in;margin-bottom:.0001pt;line-height:normal">
<span style="color:black">Btu/h-F<o:p></o:p></span></p>
</td>
</tr>
<tr style="height:15.0pt">
<td width="263" nowrap="" valign="bottom" style="width:197.0pt;border:solid windowtext 1.0pt;border-top:none;padding:0in 5.4pt 0in 5.4pt;height:15.0pt">
<p class="MsoNormal" style="margin-bottom:0in;margin-bottom:.0001pt;line-height:normal">
<span style="color:black">UA for Return Duct<o:p></o:p></span></p>
</td>
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<p class="MsoNormal" align="center" style="margin-bottom:0in;margin-bottom:.0001pt;text-align:center;line-height:normal">
<span style="color:black">51<o:p></o:p></span></p>
</td>
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<p class="MsoNormal" style="margin-bottom:0in;margin-bottom:.0001pt;line-height:normal">
<span style="color:black">Btu/h-F<o:p></o:p></span></p>
</td>
</tr>
<tr style="height:15.0pt">
<td width="263" nowrap="" valign="bottom" style="width:197.0pt;border:solid windowtext 1.0pt;border-top:none;padding:0in 5.4pt 0in 5.4pt;height:15.0pt">
<p class="MsoNormal" style="margin-bottom:0in;margin-bottom:.0001pt;line-height:normal">
<span style="color:black">Duct Zone<o:p></o:p></span></p>
</td>
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<p class="MsoNormal" align="center" style="margin-bottom:0in;margin-bottom:.0001pt;text-align:center;line-height:normal">
<span style="color:black">Roof Zone<o:p></o:p></span></p>
</td>
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<p class="MsoNormal" style="margin-bottom:0in;margin-bottom:.0001pt;line-height:normal">
<span style="color:black"> <o:p></o:p></span></p>
</td>
</tr>
</tbody>
</table>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">There are a couple of things that I have noticed.<o:p></o:p></p>
<ol style="margin-top:0in" start="1" type="1">
<li class="MsoListParagraph" style="margin-left:0in;mso-list:l0 level1 lfo2">When I select a residential system (split system), the duct leakage option is grayed out under duct losses. Why is that?<o:p></o:p></li><li class="MsoListParagraph" style="margin-left:0in;mso-list:l0 level1 lfo2">When I change the information for the duct losses as shown, to 0 for the UA of the supply and return duct, and 0 for the leakage rate, I get the same values for the LS-D and LS-E reports
for the MBTUs for the roof zone.<o:p></o:p></li></ol>
<p class="MsoNormal">I am new to equest and any help you can give me will be greatly appreciated.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Thanks,<o:p></o:p></p>
<p class="MsoNormal">Brian Wiggins<o:p></o:p></p>
<p class="MsoNormal">(803)-521-4991<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
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