<div dir="ltr"><div class="gmail_default" style="font-family:tahoma,sans-serif;color:rgb(39,78,19)"><p class="MsoNormal" style="margin-bottom:0.0001pt;line-height:normal;background-image:initial;background-position:initial;background-size:initial;background-repeat:initial;background-origin:initial;background-clip:initial"><span style="font-size:10pt;font-family:Arial,sans-serif">Nick,<br><br><span></span></span></p>
<p class="MsoNormal" style="margin-bottom:0.0001pt;line-height:normal;background-image:initial;background-position:initial;background-size:initial;background-repeat:initial;background-origin:initial;background-clip:initial"><span style="font-size:10pt;font-family:Arial,sans-serif">Thank you for your
guidance, as always your suggestions is very helpful.<br><br><span></span></span></p>
<p class="MsoNormal" style="margin-bottom:0.0001pt;line-height:normal;background-image:initial;background-position:initial;background-size:initial;background-repeat:initial;background-origin:initial;background-clip:initial"><span style="font-size:10pt;font-family:Arial,sans-serif">I am agreeing with you
that serious energy savings related to service hot water serving is through low
flow fixtures, however the manufacturer provided some engineering data,
including thermal efficiency, of the water heater (page 8 of the attach file) that
I thought can be helpful to achieve more savings.<br><br><span></span></span></p>
<p class="MsoNormal" style="margin-bottom:0.0001pt;line-height:normal;background-image:initial;background-position:initial;background-size:initial;background-repeat:initial;background-origin:initial;background-clip:initial"><span style="font-size:10pt;font-family:Arial,sans-serif">I wanted to be sure on
selecting the correct system for the base model. As I understand from your
suggestions, since this is storage less heater in the proposed design, for the
baseline model, I have to select “Gas instantaneous water heater” in Table 7.8
and there are no any other options, is this correct?<br><br><span></span></span></p>
<p class="MsoNormal" style="margin-bottom:0.0001pt;line-height:normal;background-image:initial;background-position:initial;background-size:initial;background-repeat:initial;background-origin:initial;background-clip:initial"><span style="font-size:10pt;font-family:Arial,sans-serif">I truly appreciate
your help,<br>
Morteza<span></span></span></p></div></div><div class="gmail_extra"><br clear="all"><div><div class="gmail_signature" data-smartmail="gmail_signature"><div dir="ltr"><img src="https://lh6.googleusercontent.com/Uuukta80GuFfvKouzA0mdSvUXqml7MtSwSiw-evuGMU=w147-h43-p-no"><br><div><br></div></div></div></div>
<br><div class="gmail_quote">On Mon, Jun 19, 2017 at 5:05 PM, Nicholas Caton <span dir="ltr"><<a href="mailto:Nicholas.Caton@schneider-electric.com" target="_blank">Nicholas.Caton@schneider-electric.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif">I don’t believe I’ve ever documented 30-40% Service Hot Water savings on unitary heating equipment alone. Either your designer/manufacturer must also be counting on serious
reductions with low flow fixtures, or somebody is trying to sell something...<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif"><u></u> <u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif">The Appendix G Table G3.1 will direct you back towards the table at the end of the Service Water Heating section in 90.1 for direct guidance on what the baseline case should
reflect in relation to your proposed case instantaneous heaters. Looks like for your make/model you’ll be needing to address both thermal combustion efficiency AND determine standby losses based upon the capacity of the unit cited. <u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif"><u></u> <u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif">I’d advise caution before immediately entering “n/a” for proposed case standby losses in your LEED documentation. Consider whether in fact there is a storage tank somewhere,
or other opportunities outside of combustion and piping distributions for heat to leave the system.<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif"><u></u> <u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif">For the proposed case side, I might poke the manufacturer (time allowing) to provide you a thermal efficiency (combustion + condensate recovery) at a sampling of firing rates
for a given delta (ground water </span><span style="font-size:11.0pt;font-family:Wingdings">à</span><span style="font-size:11.0pt;font-family:"Calibri",sans-serif"> delivery temp), and use that data to evaluate whether the library curves eQUEST assigns for
instantaneous gas boilers is in alignment or otherwise needs tweaking. If you don’t have time to dive this far I’d simply be mindful to ensure baseline + proposed case curves are at least matching.<u></u><u></u></span></p>
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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif">Hope that helps!<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif"><u></u> <u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif">~Nick<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif"><u></u> <u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Arial",sans-serif;color:#3a7a46"><img width="726" height="9" style="width:7.5625in;height:.0937in" id="m_1949692946875582329Picture_x0020_1" src="cid:image001.png@01D2E912.F83239D0"><u></u><u></u></span></p>
<p class="MsoNormal"><b><span style="font-size:11.0pt;font-family:"Arial",sans-serif;color:#3a7a46">Nick Caton, P.E., BEMP</span></b><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#3a7a46"><u></u><u></u></span></p>
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<p class="MsoNormal"><b><span style="font-size:11.0pt;font-family:"Calibri",sans-serif">From:</span></b><span style="font-size:11.0pt;font-family:"Calibri",sans-serif"> Equest-users [mailto:<a href="mailto:equest-users-bounces@lists.onebuilding.org" target="_blank">equest-users-bounces@<wbr>lists.onebuilding.org</a>]
<b>On Behalf Of </b>Morteza Kasmai via Equest-users<br>
<b>Sent:</b> Monday, June 19, 2017 10:54 AM<br>
<b>To:</b> <a href="mailto:equest-users@lists.onebuilding.org" target="_blank">equest-users@lists.<wbr>onebuilding.org</a><br>
<b>Subject:</b> [Equest-users] Tank less DWH<u></u><u></u></span></p><div><div class="h5">
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif;color:#274e13">Hello, everyone
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<br>
I am trying to model a new DWH (Intelli-hot system Gen-II-iQ1501)</span><span style="font-size:10.0pt;font-family:"Arial",sans-serif;color:black"> </span><span style="font-size:10.0pt;font-family:"Arial",sans-serif;color:#274e13">for a mid-rise residential
building. This is a high-output, on-demand water heater, which eliminates storage tank, standby losses, and mixing valves. Per the manufacturers and the project’s engineer notes, expected savings on hot water for this type of WH compare to a regular storage
tank WH is 30% to 40%. I am wondering what type of WH should I select for the Baseline Case in order to comply with ASHRAE/LEED energy modeling protocol.</span><span style="font-family:"Tahoma",sans-serif;color:#274e13"><u></u><u></u></span></p>
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Your thoughts and suggestions would be highly appreciated,<br>
Morteza</span><span style="font-family:"Tahoma",sans-serif;color:#274e13"><u></u><u></u></span></p>
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