<div dir="ltr">Hi Bill,<div><br></div><div>Thank you for your detailed reply - I am running DOE2.2. I will see if I can find the Eurovent rating conditions - thanks so much for the help!</div><div><br></div><div>Chris</div></div><br><div class="gmail_quote gmail_quote_container"><div dir="ltr" class="gmail_attr">On Wed, May 20, 2026 at 6:51 PM Bill Bishop <<a href="mailto:William.J.Bishop@imegcorp.com">William.J.Bishop@imegcorp.com</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div class="msg-510979200546008531">





<div lang="EN-US" style="overflow-wrap: break-word;">
<div class="m_-510979200546008531WordSection1">
<p class="MsoNormal"><span style="font-size:11pt;font-family:Calibri,sans-serif">Hi Chris,<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11pt;font-family:Calibri,sans-serif"><u></u> <u></u></span></p>
<p class="MsoNormal"><span style="font-size:11pt;font-family:Calibri,sans-serif">Are you running DOE2.2 or DOE2.3?<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11pt;font-family:Calibri,sans-serif"><u></u> <u></u></span></p>
<p class="MsoNormal"><span style="font-size:11pt;font-family:Calibri,sans-serif">Looking through the DOE2.2 Vol2 Dictionary, there is a note that, “the performance curves are normalized at the Eurovent rating conditions, rather than ARI.” For HEAT-EIR-FT,
 “this curve should be normalized to 1.0 at the ARI or Eurovent rating point” but I don’t know what temp that is (or was, in 2009).<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11pt;font-family:Calibri,sans-serif"><u></u> <u></u></span></p>
<p class="MsoNormal"><span style="font-size:11pt;font-family:Calibri,sans-serif">With DOE2.3, HEAT-EIR-FT, “the value of the curve is usually normalized to 1.0 at rated conditions, but this is not mandatory; the program will normalize the curve internally”.<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11pt;font-family:Calibri,sans-serif">In DOE2.3 mode, the default value for RATED-COND-T-HT is 45F based on the default expression for an air-cooled condenser. The default for RATED-HW-T is 110F.<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11pt;font-family:Calibri,sans-serif">You can experiment by creating a custom hourly report block with variable type Chiller that reports leaving supply temperature, entering condenser temperature and correction
 to heat-input-ration for temperature.<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11pt;font-family:Calibri,sans-serif"><u></u> <u></u></span></p>
<p class="MsoNormal"><span style="font-size:11pt;font-family:Calibri,sans-serif">Regards,<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11pt;font-family:Calibri,sans-serif">~Bill<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11pt;font-family:Calibri,sans-serif"><u></u> <u></u></span></p>
<div>
<table border="0" cellspacing="0" cellpadding="0">
<tbody>
<tr>
<td colspan="2" style="padding:0in">
<p style="margin:0in"><b><span style="font-size:10pt;font-family:Arial,sans-serif;color:black">William Bishop</span></b><span style="font-size:9pt;font-family:Arial,sans-serif;color:black">, PE, CEM, LEED AP, ASHRAE (BEMP, BEAP, CDP)
<br>
IMEG </span><span style="font-size:7.5pt;font-family:Arial,sans-serif;color:rgb(185,185,185)">|</span><span style="font-size:9pt;font-family:Arial,sans-serif;color:black"> Associate Principal | Project Executive | Sustainability & Energy</span><span style="font-size:10pt;font-family:Arial,sans-serif;color:black"><u></u><u></u></span></p>
</td>
</tr>
<tr>
<td nowrap colspan="2" style="padding:7.5pt 0in">
<p class="MsoNormal"><a href="https://www.imegcorp.com/" target="_blank"><span style="color:rgb(28,70,120);text-decoration:none"><img border="0" width="119" height="28" style="width: 1.2395in; height: 0.2916in;" id="m_-510979200546008531_x0000_i1031" src="https://stationerycentral.com/2025/imeg-logo-238x56.png" alt="IMEG"></span></a><u></u><u></u></p>
</td>
</tr>
<tr>
<td nowrap colspan="2" style="padding:0in 0in 7.5pt">
<p style="margin:0in"><span style="font-size:9pt;font-family:Arial,sans-serif;color:black">134 South Fitzhugh Street </span><span style="font-size:7.5pt;font-family:Arial,sans-serif;color:rgb(185,185,185)">|</span><span style="font-size:9pt;font-family:Arial,sans-serif;color:black"> Rochester </span><span style="font-size:7.5pt;font-family:Arial,sans-serif;color:rgb(185,185,185)">|</span><span style="font-size:9pt;font-family:Arial,sans-serif;color:black"> NY, 14608<u></u><u></u></span></p>
</td>
</tr>
<tr>
<td nowrap colspan="2" style="padding:0in"></td>
</tr>
<tr>
<td nowrap colspan="2" style="padding:4.5pt 0in 3pt">
<p class="MsoNormal"><b><span style="font-size:7.5pt;font-family:Arial,sans-serif;color:black">Military Veteran Employee </span></b><b><span style="font-size:7.5pt;font-family:Arial,sans-serif;color:rgb(28,70,120)">|</span></b><b><span style="font-size:7.5pt;font-family:Arial,sans-serif;color:black"> </span></b><b><span style="font-size:7.5pt;font-family:Arial,sans-serif;color:black"><a><span style="color:rgb(28,70,120);text-decoration:none">LinkedIn Profile</span></a></span></b><b><span style="font-size:7.5pt;font-family:Arial,sans-serif;color:black"> </span></b><b><span style="font-size:7.5pt;font-family:Arial,sans-serif;color:rgb(28,70,120)">|</span></b><b><span style="font-size:7.5pt;font-family:Arial,sans-serif;color:black"> </span></b><b><span style="font-size:7.5pt;font-family:Arial,sans-serif;color:black"><a><span style="color:rgb(28,70,120);text-decoration:none">vCard</span></a>
</span></b><u></u><u></u></p>
</td>
</tr>
<tr>
<td nowrap style="padding:4.5pt 0in 6pt">
<p style="margin:0in"><b><span style="font-size:7.5pt;font-family:Arial,sans-serif;color:rgb(28,70,120)"><a href="https://www.imegcorp.com" target="_blank"><span style="color:rgb(28,70,120);text-decoration:none">website</span></a> | <a href="https://www.google.com/maps/place/Pathfinder+Engineers+%26+Architects+LLP/@43.1504815,-77.6145058,17z/data=!3m1!4b1!4m6!3m5!1s0x89d6b4fe9e48aab1:0x6991ae3d559d5aee!8m2!3d43.1504776!4d-77.6119309!16s%2Fg%2F1tcw955j?hl=en&entry=ttu%3c!--mapURL--%3e" target="_blank"><span style="color:rgb(28,70,120);text-decoration:none">map</span></a> | <a href="https://imegcorp.com/about/news-events/" target="_blank"><span style="color:rgb(28,70,120);text-decoration:none">IMEG News</span></a><u></u><u></u></span></b></p>
</td>
<td width="100%" nowrap style="width:100%;padding:5.25pt 0in 6.75pt 6pt">
<p class="MsoNormal"><a href="http://twitter.com/IMEGcorp" target="_blank"><span style="font-size:1pt;color:rgb(28,70,120);text-decoration:none"><img border="0" width="17" height="17" style="width: 0.177in; height: 0.177in;" id="m_-510979200546008531_x0000_i1030" src="https://stationerycentral.com/2025/imeg-x-34x34.png" alt="X, formerly Twitter"></span></a><span style="font-size:1pt"><img border="0" width="5" height="5" style="width: 0.052in; height: 0.052in;" id="m_-510979200546008531_x0000_i1029" src="https://stationerycentral.com/images/clear.gif" alt="spacer"></span><a href="https://www.facebook.com/IMEGcorp/" target="_blank"><span style="font-size:1pt;color:rgb(28,70,120);text-decoration:none"><img border="0" width="17" height="17" style="width: 0.177in; height: 0.177in;" id="m_-510979200546008531_x0000_i1028" src="https://stationerycentral.com/2023/imeg-fb-34x34.png" alt="Facebook"></span></a><span style="font-size:1pt"><img border="0" width="5" height="5" style="width: 0.052in; height: 0.052in;" id="m_-510979200546008531_x0000_i1027" src="https://stationerycentral.com/images/clear.gif" alt="spacer"></span><a href="https://www.linkedin.com/company/imeg-corp" target="_blank"><span style="font-size:1pt;color:rgb(28,70,120);text-decoration:none"><img border="0" width="17" height="17" style="width: 0.177in; height: 0.177in;" id="m_-510979200546008531_x0000_i1026" src="https://stationerycentral.com/2023/imeg-li-34x34.png" alt="LinkedIn"></span></a><span style="font-size:1pt"><u></u><u></u></span></p>
</td>
</tr>
<tr>
<td colspan="2" style="padding:0in 0in 6.75pt">
<p style="margin:0in"><span style="font-size:8pt;font-family:Arial,sans-serif;color:black"><a href="https://www.imegcorp.com/about/our-story/" target="_blank"><span style="color:black">Learn more</span></a> about us and the IMEG story!<u></u><u></u></span></p>
</td>
</tr>
</tbody>
</table>
<p class="MsoNormal"><span style="display:none"><u></u> <u></u></span></p>
</div>
<p class="MsoNormal"><span style="font-size:11pt;font-family:Calibri,sans-serif"><u></u> <u></u></span></p>
<div>
<div style="border-width:1pt medium medium;border-style:solid none none;border-color:rgb(225,225,225) currentcolor currentcolor;padding:3pt 0in 0in">
<p class="MsoNormal"><b><span style="font-size:11pt;font-family:Calibri,sans-serif">From:</span></b><span style="font-size:11pt;font-family:Calibri,sans-serif"> Equest-users <<a href="mailto:equest-users-bounces@lists.onebuilding.org" target="_blank">equest-users-bounces@lists.onebuilding.org</a>>
<b>On Behalf Of </b>Chris Hadlock via Equest-users<br>
<b>Sent:</b> Wednesday, May 20, 2026 10:20 AM<br>
<b>To:</b> <a href="mailto:equest-users@lists.onebuilding.org" target="_blank">equest-users@lists.onebuilding.org</a><br>
<b>Subject:</b> [Equest-users] Heat Pump Chiller - Anyone know the Rating Conditions<u></u><u></u></span></p>
</div>
</div>
<p class="MsoNormal"><u></u> <u></u></p>
<div style="border:1pt solid rgb(156,101,0);padding:0in">
<p class="MsoNormal" style="background:rgb(255,255,153)"><strong><span style="font-size:10pt;font-family:Aptos,sans-serif;color:rgb(156,101,0);background:rgb(255,255,153)">External Email:
</span></strong><span style="font-size:10pt;color:black;background:rgb(255,255,153)">Treat links and attachments with caution.</span><u></u><u></u></p>
</div>
<div>
<div>
<p class="MsoNormal">Hi All, <u></u><u></u></p>
<div>
<p class="MsoNormal"><u></u> <u></u></p>
</div>
<div>
<p class="MsoNormal">I'm modeling a "heat pump" type chiller (air-cooled) and I'm trying to figure out the dependent variables about which the default curves are normalized so that I can create my own curves. Below is the screen-shot for my heat pump Performance
 Curves.<u></u><u></u></p>
</div>
<div>
<p class="MsoNormal"><img border="0" width="542" height="378" style="width: 5.6458in; height: 3.9375in;" id="m_-510979200546008531Picture_x0020_1" src="cid:ii_19e47b263d64cff311"><u></u><u></u></p>
</div>
<div>
<p class="MsoNormal">For example, the heating EIR curve that is a function of evap leaving T (SWT) & cond entering T (OAT): does anyone know the leaving water temperature and entering air temperature at which point this curve is normalized (i.e. returns an
 EIR value of 1.000)? I used goal seek for various combination of temperatures and here are some options (yellow cell was calculated using GOAL-SEEK ):<u></u><u></u></p>
</div>
<div>
<p class="MsoNormal"><u></u> <u></u></p>
</div>
<div>
<table border="0" cellspacing="0" cellpadding="0" width="457" style="width:343pt;border-collapse:collapse">
<tbody>
<tr style="height:15pt">
<td width="159" nowrap valign="bottom" style="width:119pt;padding:0in;height:15pt;border-color:currentcolor">
<p class="MsoNormal" align="right" style="text-align:right"><span style="font-size:11pt;font-family:Calibri,sans-serif;color:black">SWT -><u></u><u></u></span></p>
</td>
<td width="64" nowrap valign="bottom" style="width:48pt;border:1pt solid windowtext;padding:0in;height:15pt">
<p class="MsoNormal" align="right" style="text-align:right"><span style="font-size:11pt;font-family:Calibri,sans-serif;color:black">120<u></u><u></u></span></p>
</td>
<td width="64" nowrap valign="bottom" style="width:48pt;border-width:1pt 1pt 1pt medium;border-style:solid solid solid none;padding:0in;height:15pt;border-color:currentcolor">
<p class="MsoNormal" align="right" style="text-align:right"><span style="font-size:11pt;font-family:Calibri,sans-serif;color:black">115<u></u><u></u></span></p>
</td>
<td width="64" nowrap valign="bottom" style="width:48pt;border-width:1pt 1pt 1pt medium;border-style:solid solid solid none;background:yellow;padding:0in;height:15pt;border-color:currentcolor">
<p class="MsoNormal" align="right" style="text-align:right"><span style="font-size:11pt;font-family:Calibri,sans-serif;color:black">115.6816<u></u><u></u></span></p>
</td>
<td width="43" nowrap valign="bottom" style="width:32pt;border-width:1pt 1pt 1pt medium;border-style:solid solid solid none;padding:0in;height:15pt;border-color:currentcolor">
<p class="MsoNormal" align="right" style="text-align:right"><span style="font-size:11pt;font-family:Calibri,sans-serif;color:black">105<u></u><u></u></span></p>
</td>
<td width="64" nowrap valign="bottom" style="width:48pt;border-width:1pt 1pt 1pt medium;border-style:solid solid solid none;background:yellow;padding:0in;height:15pt;border-color:currentcolor">
<p class="MsoNormal" align="right" style="text-align:right"><span style="font-size:11pt;font-family:Calibri,sans-serif;color:black">112.2388<u></u><u></u></span></p>
</td>
</tr>
<tr style="height:15pt">
<td nowrap valign="bottom" style="padding:0in;height:15pt;border-color:currentcolor">
<p class="MsoNormal" align="right" style="text-align:right"><span style="font-size:11pt;font-family:Calibri,sans-serif;color:black">OAT -><u></u><u></u></span></p>
</td>
<td nowrap valign="bottom" style="border-width:medium 1pt 1pt;border-style:none solid solid;background:yellow;padding:0in;height:15pt;border-color:currentcolor windowtext windowtext">
<p class="MsoNormal" align="right" style="text-align:right"><span style="font-size:11pt;font-family:Calibri,sans-serif;color:black">54.36586<u></u><u></u></span></p>
</td>
<td nowrap valign="bottom" style="border-width:medium 1pt 1pt medium;border-style:none solid solid none;background:yellow;padding:0in;height:15pt;border-color:currentcolor windowtext windowtext currentcolor">
<p class="MsoNormal" align="right" style="text-align:right"><span style="font-size:11pt;font-family:Calibri,sans-serif;color:black">61.10728<u></u><u></u></span></p>
</td>
<td nowrap valign="bottom" style="border-width:medium 1pt 1pt medium;border-style:none solid solid none;padding:0in;height:15pt;border-color:currentcolor windowtext windowtext currentcolor">
<p class="MsoNormal" align="right" style="text-align:right"><span style="font-size:11pt;font-family:Calibri,sans-serif;color:black">47<u></u><u></u></span></p>
</td>
<td nowrap valign="bottom" style="border-width:medium 1pt 1pt medium;border-style:none solid solid none;background:yellow;padding:0in;height:15pt;border-color:currentcolor windowtext windowtext currentcolor">
<p class="MsoNormal" align="right" style="text-align:right"><span style="font-size:11pt;font-family:Calibri,sans-serif;color:black">39.21<u></u><u></u></span></p>
</td>
<td nowrap valign="bottom" style="border-width:medium 1pt 1pt medium;border-style:none solid solid none;padding:0in;height:15pt;border-color:currentcolor windowtext windowtext currentcolor">
<p class="MsoNormal" align="right" style="text-align:right"><span style="font-size:11pt;font-family:Calibri,sans-serif;color:black">44<u></u><u></u></span></p>
</td>
</tr>
<tr style="height:15pt">
<td nowrap valign="bottom" style="padding:0in;height:15pt;border-color:currentcolor">
<p class="MsoNormal" align="right" style="text-align:right"><span style="font-size:11pt;font-family:Calibri,sans-serif;color:black">Goal Seek set to 1.000 -><u></u><u></u></span></p>
</td>
<td nowrap valign="bottom" style="border-width:medium 1pt 1pt;border-style:none solid solid;padding:0in;height:15pt;border-color:currentcolor windowtext windowtext">
<p class="MsoNormal" align="right" style="text-align:right"><span style="font-size:11pt;font-family:Calibri,sans-serif;color:black">1.003649<u></u><u></u></span></p>
</td>
<td nowrap valign="bottom" style="border-width:medium 1pt 1pt medium;border-style:none solid solid none;padding:0in;height:15pt;border-color:currentcolor windowtext windowtext currentcolor">
<p class="MsoNormal" align="right" style="text-align:right"><span style="font-size:11pt;font-family:Calibri,sans-serif;color:black">0.999675<u></u><u></u></span></p>
</td>
<td nowrap valign="bottom" style="border-width:medium 1pt 1pt medium;border-style:none solid solid none;padding:0in;height:15pt;border-color:currentcolor windowtext windowtext currentcolor">
<p class="MsoNormal" align="right" style="text-align:right"><span style="font-size:11pt;font-family:Calibri,sans-serif;color:black">0.99995<u></u><u></u></span></p>
</td>
<td nowrap valign="bottom" style="border-width:medium 1pt 1pt medium;border-style:none solid solid none;padding:0in;height:15pt;border-color:currentcolor windowtext windowtext currentcolor">
<p class="MsoNormal" align="right" style="text-align:right"><span style="font-size:11pt;font-family:Calibri,sans-serif;color:black">1<u></u><u></u></span></p>
</td>
<td nowrap valign="bottom" style="border-width:medium 1pt 1pt medium;border-style:none solid solid none;padding:0in;height:15pt;border-color:currentcolor windowtext windowtext currentcolor">
<p class="MsoNormal" align="right" style="text-align:right"><span style="font-size:11pt;font-family:Calibri,sans-serif;color:black">0.999975<u></u><u></u></span></p>
</td>
</tr>
</tbody>
</table>
</div>
<div>
<p class="MsoNormal"><u></u> <u></u></p>
</div>
<div>
<p class="MsoNormal">Based on these results, it's looking like perhaps 115F SWT and 47F OAT might be correct...but wanted to confirm.<u></u><u></u></p>
</div>
<div>
<p class="MsoNormal"><u></u> <u></u></p>
</div>
<div>
<p class="MsoNormal">Since there is a second heating EIR curve for OAT < 39F, does anyone know the leaving water temperature and entering air temperature at which point this curve is normalized?<u></u><u></u></p>
</div>
<div>
<p class="MsoNormal"><u></u> <u></u></p>
</div>
<div>
<p class="MsoNormal">Thanks,<u></u><u></u></p>
</div>
<div>
<p class="MsoNormal">Chris<u></u><u></u></p>
</div>
</div>
</div>
</div>
</div>

</div></blockquote></div>