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<p class="MsoNormal">I believe the split-system residential assumes a ductless system. Condenser outside and fan coil unit wall/ceiling or floor mounted inside.
<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal" style="margin-bottom:0in;margin-bottom:.0001pt;line-height:normal">
<b><span style="font-size:10.0pt;font-family:"Arial",sans-serif">Christopher R Jones, P.Eng.<o:p></o:p></span></b></p>
<p class="MsoNormal" style="margin-bottom:0in;margin-bottom:.0001pt;line-height:normal">
<span style="font-size:9.0pt;font-family:"Arial",sans-serif">T+ 1 416-644-0252<o:p></o:p></span></p>
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<span style="font-size:8.0pt;font-family:"Arial",sans-serif"><o:p> </o:p></span></p>
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<img width="60" height="29" style="width:.625in;height:.302in" id="_x0031_cc2331b-d8c3-424e-81de-2b17716d444e.png_x003f_ver_x003d_1495657656000" src="cid:image003.png@01D48728.18D4D530"><o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<b>From:</b> Equest-users [mailto: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>
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<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>
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<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>
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<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>
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<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>
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<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>
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<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>
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<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>
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<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>
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<p class="MsoNormal" style="margin-bottom:0in;margin-bottom:.0001pt;line-height:normal">
<span style="color:black">Percent<o:p></o:p></span></p>
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<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>
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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"> 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>
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<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>
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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">15<o:p></o:p></span></p>
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<p class="MsoNormal" style="margin-bottom:0in;margin-bottom:.0001pt;line-height:normal">
<span style="color:black">SEER<o:p></o:p></span></p>
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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">Return Duct Surface Area<o:p></o:p></span></p>
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<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>
<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>
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<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>
<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"> <o:p></o:p></span></p>
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<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>
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<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"> 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>
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<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>
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<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">51<o:p></o:p></span></p>
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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>
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<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>
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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>
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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>
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<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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