<html><head><style type="text/css"><!-- DIV {margin:0px;} --></style></head><body><div style="font-family:times new roman,new york,times,serif;font-size:10pt">Thanks Kushagra & Nick.<br><br>Paul Diglio<br><div><br></div><div style="font-family: times new roman,new york,times,serif; font-size: 10pt;"><br><div style="font-family: times new roman,new york,times,serif; font-size: 12pt;"><font face="Tahoma" size="2"><hr size="1"><b><span style="font-weight: bold;">From:</span></b> Nick Caton <ncaton@smithboucher.com><br><b><span style="font-weight: bold;">To:</span></b> Kushagra Juneja <kce4@kamalcogentenergy.com>; Paul Diglio <paul.diglio@sbcglobal.net>; equest-users@lists.onebuilding.org<br><b><span style="font-weight: bold;">Sent:</span></b> Wed, October 5, 2011 9:40:19 AM<br><b><span style="font-weight: bold;">Subject:</span></b> RE: [Equest-users] 90.1-2007 Table 7.8 Water Heater Efficiencies<br></font><br>Note: Forwarded message is
attached.<br><br>
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--></style><div class="WordSection1"><p class="MsoNormal"><span style="font-size: 11pt; font-family: "sans-serif"; color: rgb(31, 73, 125);">I expect the natural followup is “how do I put this (SL) into eQuest?”</span></p><p class="MsoNormal"><span style="font-size: 11pt; font-family: "sans-serif"; color: rgb(31, 73, 125);"> </span></p><p class="MsoNormal"><span style="font-size: 11pt; font-family: "sans-serif"; color: rgb(31, 73, 125);">Attached thread spells out how you start with SL and arrive at UA. Also includes an example with the electric heater equation.</span></p><p class="MsoNormal"><span style="font-size: 11pt; font-family: "sans-serif"; color: rgb(31, 73, 125);"> </span></p><p class="MsoNormal"><span style="font-size: 11pt; font-family: "sans-serif"; color: rgb(31, 73, 125);">~Nick</span></p><p class="MsoNormal"><span style="font-size: 11pt; font-family:
"sans-serif"; color: rgb(31, 73, 125);"> </span></p><div><p class="MsoNormal"><span style="font-size: 11pt; font-family: "sans-serif"; color: rgb(31, 73, 125);"><img id="Picture_x0020_1" src="cid:1.1179472325@web83308.mail.sp1.yahoo.com" alt="cid:489575314@22072009-0ABB" width="119" height="37"></span><b><span style="font-size: 11pt; font-family: "sans-serif"; color: rgb(45, 77, 94);"></span></b></p><p class="MsoNormal"><b><span style="font-size: 11pt; font-family: "sans-serif"; color: rgb(45, 77, 94);"> </span></b></p><p class="MsoNormal"><b><span style="font-family: "sans-serif"; color: rgb(45, 77, 94);">NICK CATON, P.E.</span></b><b><span style="font-family: "sans-serif"; color: rgb(45, 77, 94);"></span></b></p><p class="MsoNormal"><span style="font-size: 7.5pt; font-family: "sans-serif"; color: rgb(204, 153, 0);">SENIOR ENGINEER</span></p><p class="MsoNormal"><span
style="font-size: 7.5pt; font-family: "sans-serif"; color: rgb(204, 153, 0);"> </span></p><p class="MsoNormal"><span style="font-size: 10pt; font-family: "sans-serif"; color: rgb(45, 77, 94);">Smith & Boucher Engineers</span><span style="font-size: 7.5pt; color: rgb(204, 153, 0);"></span></p><p class="MsoNormal"><span style="font-size: 10pt; font-family: "sans-serif"; color: rgb(45, 77, 94);">25501 west valley parkway, suite 200</span></p><p class="MsoNormal"><span style="font-size: 10pt; font-family: "sans-serif"; color: rgb(45, 77, 94);">olathe, ks 66061</span></p><p class="MsoNormal"><span style="font-size: 10pt; font-family: "sans-serif"; color: rgb(45, 77, 94);">direct 913.344.0036</span></p><p class="MsoNormal"><span style="font-size: 10pt; font-family: "sans-serif"; color: rgb(45, 77, 94);">fax 913.345.0617</span></p><p class="MsoNormal"><span style="font-size: 11pt;
font-family: "sans-serif"; color: rgb(31, 73, 125);"><a rel="nofollow" title="blocked::www.smithboucher.com"><span style="font-size: 10pt;">www.smithboucher.com</span></a></span><u><span style="font-size: 10pt; font-family: "sans-serif"; color: blue;"> </span></u><span style="font-size: 11pt; font-family: "sans-serif"; color: rgb(31, 73, 125);"></span></p></div><p class="MsoNormal"><span style="font-size: 11pt; font-family: "sans-serif"; color: rgb(31, 73, 125);"> </span></p><div><div style="border-width: 1pt medium medium; border-style: solid none none; border-color: rgb(181, 196, 223) -moz-use-text-color -moz-use-text-color; padding: 3pt 0in 0in;"><p class="MsoNormal"><b><span style="font-size: 10pt; font-family: "sans-serif";">From:</span></b><span style="font-size: 10pt; font-family: "sans-serif";"> equest-users-bounces@lists.onebuilding.org
[mailto:equest-users-bounces@lists.onebuilding.org] <b>On Behalf Of </b>Kushagra Juneja<br><b>Sent:</b> Wednesday, October 05, 2011 12:13 AM<br><b>To:</b> 'Paul Diglio'; equest-users@lists.onebuilding.org<br><b>Subject:</b> Re: [Equest-users] 90.1-2007 Table 7.8 Water Heater Efficiencies</span></p></div></div><p class="MsoNormal"> </p><p class="MsoNormal"><span style="font-size: 10pt; font-family: "sans-serif"; color: blue;">Hi Paul,</span></p><p class="MsoNormal"><span style="font-size: 10pt; font-family: "sans-serif"; color: blue;"> </span></p><p class="MsoNormal"><span style="font-size: 10pt; font-family: "sans-serif"; color: blue;">There are two things being talked about, one is thermal efficiency and the other is standby loss. Standby loss represented as (Q/800+110 SqRt V) and thermal efficiency represented as 80%. I had the same doubt a while back. If you look at other Formulae they are represented in the
same way. Like for instantaneous water heaters Energy Factor is given by 0.62-0.0019V. Btu/h is the unit for Standby Loss. Not a multiplication factor. Hope this helps.</span></p><p class="MsoNormal"><span style="font-size: 10pt; font-family: "sans-serif"; color: blue;"> </span></p><div><p class="MsoNormal"><span style="font-size: 10pt; font-family: "sans-serif"; color: blue;">Cheers</span></p><p class="MsoNormal"><span style="font-size: 10pt; font-family: "sans-serif"; color: blue;"> </span></p><p class="MsoNormal"><span style="font-size: 10pt; font-family: "sans-serif"; color: blue;">Kushagra </span></p><p class="MsoNormal"><span style="font-size: 10pt; font-family: "sans-serif"; color: blue;"> </span></p></div><p class="MsoNormal"><span style="font-size: 10pt; font-family: "sans-serif"; color: navy;"> </span></p><div><div class="MsoNormal" style="text-align: center;"
align="center"><hr align="center" width="100%" size="2"></div><p class="MsoNormal"><b><span style="font-size: 10pt; font-family: "sans-serif";">From:</span></b><span style="font-size: 10pt; font-family: "sans-serif";"> equest-users-bounces@lists.onebuilding.org [mailto:equest-users-bounces@lists.onebuilding.org] <b>On Behalf Of </b>Paul Diglio<br><b>Sent:</b> Tuesday, October 04, 2011 5:07 PM<br><b>To:</b> equest-users@lists.onebuilding.org<br><b>Subject:</b> [Equest-users] 90.1-2007 Table 7.8 Water Heater Efficiencies</span></p></div><p class="MsoNormal"> </p><div><div><p class="MsoNormal"><span style="font-size: 10pt; color: black;">Could anyone help me understand the calculation for the minimum efficiency of gas storage water heaters per the table above?<br><br>The calculation is 80%Et (Q/800+110 SqRt V) SL, Btuh.<br><br>I understand that Q is the nameplate input rate in Btuh and V is the volume.<br><br>Do I use the volume
of the whole system, the storage tank only or the recovery rate volume?<br><br>I understand SL is the standby loss. Does SL, Btuh mean multiply the equation in parenthesis by the standby loss in btu's per hour?<br><br>Thanks for the help,<br><br>Paul Diglio</span></p></div></div></div></div></div>
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