<html><head></head><body><div class="ydpabef47b8yahoo-style-wrap" style="font-family:Helvetica Neue, Helvetica, Arial, sans-serif;font-size:16px;"><div><div dir="ltr" data-setdir="false">Hi Bill:</div><div dir="ltr" data-setdir="false"><br></div><div dir="ltr" data-setdir="false">In Table 6.8.1-1 under Unitary AC Air Cooled all I see is IEER's listed effective after 1/1/2016.</div><div dir="ltr" data-setdir="false"><br></div><div dir="ltr" data-setdir="false">Am I missing something?</div><div dir="ltr" data-setdir="false"><br></div><div dir="ltr" data-setdir="false">Thank you,<br></div><div><br></div><div class="ydpabef47b8signature">Paul Diglio<br>87 Fairmont Avenue <br>New Haven, CT 06513 <br></div></div><br><div><br></div>
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On Friday, January 3, 2020, 3:34:36 PM EST, Bishop, Bill <bbishop@pathfinder-ea.com> wrote:
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<p class="ydp84337c20yiv2030434401MsoNormal">Hi Paul,</p>
<p class="ydp84337c20yiv2030434401MsoNormal">There are both full-load (EER) and part-load (IEER) minimum efficiencies for baseline air-cooled packaged DX systems in 90.1-2013 (and -2010, -2016).</p>
<p class="ydp84337c20yiv2030434401MsoNormal">It is a straightforward process to calculate the eQUEST cooling EIR using the equations provided in G3.1.2.1 for full-load COPnfcooling. (EIR = 1/COP.)</p>
<p class="ydp84337c20yiv2030434401MsoNormal">To also simulate the part-load (IEER) performance, at least one of the default eQUEST/DOE-2 part-load performance curves will have to be modified. I am not aware of any developer effort to date to create performance curves to match specific
IEERs but it would be welcomed. I could walk you through the process if you wanted to give it a try.</p>
<p class="ydp84337c20yiv2030434401MsoNormal">FYI – I believe the IEER values you reference below are for water-cooled condensers, not air-cooled.</p>
<p class="ydp84337c20yiv2030434401MsoNormal">Regards,</p>
<p class="ydp84337c20yiv2030434401MsoNormal">~Bill</p>
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<p class="ydp84337c20yiv2030434401MsoNormal"><b><span style="font-size:10.0pt;">William Bishop, PE, BEMP, BEAP, CEM, LEED AP</span></b></p>
<p class="ydp84337c20yiv2030434401MsoNormal"><b><span style="font-size:9.0pt;">Senior Energy Engineer</span></b></p>
<p class="ydp84337c20yiv2030434401MsoNormal"><b><span style="font-size:3.0pt;"> </span></b></p>
<p class="ydp84337c20yiv2030434401MsoNormal"><img style="width:.9479in;min-height:.6145in;" src="cid:vw51CbI4GIuf9z9kPyCw" alt="Pathfinder-EA-logo-2" data-inlineimagemanipulating="true" width="91" hspace="12" height="59" align="left"><b><i><span style="font-size:9.0pt;">T:
(585) 698-1956</span></i></b><b><i><span style="color:#002060;"> </span>
</i></b><span style="color:#1F497D;"> </span><span style="font-size:9.0pt;">F: (585) 325-6005</span></p>
<p class="ydp84337c20yiv2030434401MsoNormal"><a shape="rect" href="mailto:wbishop@pathfinder-ea.com" rel="nofollow" target="_blank"><span style="font-size:9.0pt;">bbishop@pathfinder-ea.com</span></a><span style="font-size:9.0pt;"> </span><a shape="rect" href="http://www.pathfinder-ea.com/" rel="nofollow" target="_blank"><span style="font-size:9.0pt;">www.pathfinder-ea.com</span></a><span style="color:#1F497D;"></span></p>
<p class="ydp84337c20yiv2030434401MsoNormal"><span style="font-size:9.0pt;">134 South Fitzhugh Street</span></p>
<p class="ydp84337c20yiv2030434401MsoNormal"><span style="font-size:9.0pt;">Rochester, NY 14608
<img id="ydp84337c20yiv2030434401Picture_x0020_1" style="width:.2708in;min-height:.2395in;" src="cid:yWpR7gXWUroJc3xWfzxv" data-inlineimagemanipulating="true" width="26" height="23" border="0">
</span><i><span style="font-size:7.0pt;">Ask me why Carbon Fee & Dividend may be right for you.</span></i><span style="color:#1F497D;"></span></p>
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<p class="ydp84337c20yiv2030434401MsoNormal"><b>From:</b> Equest-users <equest-users-bounces@lists.onebuilding.org>
<b>On Behalf Of </b>Paul Diglio via Equest-users<br clear="none">
<b>Sent:</b> Wednesday, January 1, 2020 5:55 PM<br clear="none">
<b>To:</b> Equest-users <equest-users@lists.onebuilding.org><br clear="none">
<b>Subject:</b> [Equest-users] 90.1-2013 IEER Efficiency Conversions</p>
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<p class="ydp84337c20yiv2030434401MsoNormal"><span style="font-size:12.0pt;">Hi All,</span></p>
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<p class="ydp84337c20yiv2030434401MsoNormal"><span style="font-size:12.0pt;"> </span></p>
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<p class="ydp84337c20yiv2030434401MsoNormal"><span style="font-size:12.0pt;">90.1-2013 defines IEER instead of EER for large, air-cooled packaged DX systems.</span></p>
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<p class="ydp84337c20yiv2030434401MsoNormal"><span style="font-size:12.0pt;"> </span></p>
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<p class="ydp84337c20yiv2030434401MsoNormal"><span style="font-size:12.0pt;">When modeling a baseline system, is there any way to convert the IEER to EER? I know IEER is calculated using 4 levels of equipment loads, but when working with the baseline,
I don't have any actual equipment datasheets to consult.</span></p>
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<p class="ydp84337c20yiv2030434401MsoNormal"><span style="font-size:12.0pt;"> </span></p>
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<p class="ydp84337c20yiv2030434401MsoNormal"><span style="font-size:12.0pt;">My cooling systems are between 177 MBH and 1,482 MBH. IEER's per 90.1 are between 11 and 13.7.</span></p>
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<p class="ydp84337c20yiv2030434401MsoNormal"><span style="font-size:12.0pt;"> </span></p>
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<p class="ydp84337c20yiv2030434401MsoNormal"><span style="font-size:12.0pt;">Thank you,</span></p>
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<p class="ydp84337c20yiv2030434401MsoNormal"><span style="font-size:12.0pt;"> </span></p>
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<p class="ydp84337c20yiv2030434401MsoNormal"><span style="font-size:12.0pt;"> </span></p>
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<p class="ydp84337c20yiv2030434401MsoNormal" style="margin-bottom:12.0pt;"><span style="font-size:12.0pt;">Paul Diglio<br clear="none">
87 Fairmont Avenue <br clear="none">
New Haven, CT 06513 </span></p>
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