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<p class=MsoNormal><span style='color:#1F497D'>Hi David!<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'>Hm…  I’ll take
a swing at this…<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'>I’d suggest simply modeling
a normal gas storage water heater.<o:p></o:p></span></p>

<p class=MsoListParagraph style='text-indent:-.25in;mso-list:l0 level1 lfo1'><![if !supportLists]><span
style='color:#1F497D'><span style='mso-list:Ignore'>1.<span style='font:7.0pt "Times New Roman"'>      
</span></span></span><![endif]><span style='color:#1F497D'>Zero out the ambient
tank heat losses in detailed edit (set tank UA to 0)<o:p></o:p></span></p>

<p class=MsoListParagraph style='text-indent:-.25in;mso-list:l0 level1 lfo1'><![if !supportLists]><span
style='color:#1F497D'><span style='mso-list:Ignore'>2.<span style='font:7.0pt "Times New Roman"'>      
</span></span></span><![endif]><span style='color:#1F497D'>Match burner efficiency
(HIR) and capacity to the actual equipment<o:p></o:p></span></p>

<p class=MsoListParagraph style='text-indent:-.25in;mso-list:l0 level1 lfo1'><![if !supportLists]><span
style='color:#1F497D'><span style='mso-list:Ignore'>3.<span style='font:7.0pt "Times New Roman"'>      
</span></span></span><![endif]><span style='color:#1F497D'>Call it a day ;) 
<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'>By default (coming out of the
wizards), hot water loops don’t have a loop UA defined and so will not
model losses.  If you’re trying to differentiate between
instantaneous and storage systems with a static/recirc loop, your storage model
ought to define something for loop losses to keep everything on a level playing
field.<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'>~Nick<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>

<div>

<p class=MsoNormal><span style='color:#1F497D'><img width=119 height=37
id="_x0000_i1026" src="cid:image002.jpg@01CBD37D.2FDAC3F0"
alt="cid:489575314@22072009-0ABB"></span><b><span style='font-family:"Stylus BT","sans-serif";
color:#2D4D5E'><o:p></o:p></span></b></p>

<p class=MsoNormal><b><span style='font-family:"Stylus BT","sans-serif";
color:#2D4D5E'><o:p> </o:p></span></b></p>

<p class=MsoNormal><b><span style='font-family:"Stylus BT","sans-serif";
color:#2D4D5E'>NICK CATON, E.I.T.</span></b><b><span style='font-size:12.0pt;
font-family:"Stylus BT","sans-serif";color:#2D4D5E'><o:p></o:p></span></b></p>

<p class=MsoNormal><span style='font-size:7.5pt;color:#CC9900'>PROJECT ENGINEER<o:p></o:p></span></p>

<p class=MsoNormal><span style='font-size:10.0pt;color:#2D4D5E'>Smith &
Boucher Engineers</span><span style='font-size:7.5pt;font-family:"Times New Roman","serif";
color:#CC9900'><o:p></o:p></span></p>

<p class=MsoNormal><span style='font-size:10.0pt;color:#2D4D5E'>25501 west
valley parkway<o:p></o:p></span></p>

<p class=MsoNormal><span style='font-size:10.0pt;color:#2D4D5E'>olathe ks 66061<o:p></o:p></span></p>

<p class=MsoNormal><span style='font-size:10.0pt;color:#2D4D5E'>direct 913
344.0036<o:p></o:p></span></p>

<p class=MsoNormal><span style='font-size:10.0pt;color:#2D4D5E'>fax 913
345.0617<o:p></o:p></span></p>

<p class=MsoNormal><span style='color:#1F497D'><a href="www.smithboucher.com"
title="blocked::www.smithboucher.com"><span style='font-size:10.0pt'>www.smithboucher.com</span></a></span><u><span
style='font-size:10.0pt;color:blue'> </span></u><span style='color:#1F497D'><o:p></o:p></span></p>

</div>

<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"'> equest-users-bounces@lists.onebuilding.org
[mailto:equest-users-bounces@lists.onebuilding.org] <b>On Behalf Of </b>David
Cantrill<br>
<b>Sent:</b> Tuesday, February 22, 2011 2:38 PM<br>
<b>To:</b> equest-users@lists.onebuilding.org<br>
<b>Subject:</b> [Equest-users] Modeling gas instantaneous water heaters in eQuest<o:p></o:p></span></p>

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<p class=MsoNormal><o:p> </o:p></p>

<p class=MsoNormal>I am working on a project that is using instantaneous gas
water heaters.  What is the best way to model these in eQuest?<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><o:p> </o:p></p>

<p class=MsoNormal> <span style='font-size:14.0pt'><br>
</span><b><span style='font-family:"Arial","sans-serif"'>David Cantrill</span></b><br>
<b><span style='font-family:"Arial","sans-serif"'>Branch Manager - Mississippi<br>
</span></b><a href="http://www.cxgbs.com/"><span style='font-size:14.0pt;
color:windowtext;text-decoration:none'><img border=0 width=415 height=116
id="Picture_x0020_1" src="cid:image003.gif@01CBD37D.2FDAC3F0"
alt="Description: cid:3360324511_1137265"></span></a><span style='font-size:
14.0pt'><br>
</span><span style='font-size:10.0pt'>CxGBS is not responsible for design
concept, design criteria, compliance with codes, design or general construction
scheduling, cost estimating, or construction management.  <br>
<br>
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<p class=MsoNormal><o:p> </o:p></p>

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