<html xmlns:v="urn:schemas-microsoft-com:vml" xmlns:o="urn:schemas-microsoft-com:office:office" xmlns:w="urn:schemas-microsoft-com:office:word" xmlns:m="http://schemas.microsoft.com/office/2004/12/omml" xmlns="http://www.w3.org/TR/REC-html40">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<meta name="Generator" content="Microsoft Word 15 (filtered medium)">
<!--[if !mso]><style>v\:* {behavior:url(#default#VML);}
o\:* {behavior:url(#default#VML);}
w\:* {behavior:url(#default#VML);}
.shape {behavior:url(#default#VML);}
</style><![endif]--><style><!--
/* Font Definitions */
@font-face
{font-family:"Cambria Math";
panose-1:2 4 5 3 5 4 6 3 2 4;}
@font-face
{font-family:Calibri;
panose-1:2 15 5 2 2 2 4 3 2 4;}
@font-face
{font-family:Aptos;}
/* Style Definitions */
p.MsoNormal, li.MsoNormal, div.MsoNormal
{margin:0in;
font-size:12.0pt;
font-family:"Aptos",sans-serif;}
span.EmailStyle19
{mso-style-type:personal-reply;
font-family:"Calibri",sans-serif;
color:windowtext;
font-weight:normal;
font-style:normal;}
.MsoChpDefault
{mso-style-type:export-only;
font-size:10.0pt;
mso-ligatures:none;}
@page WordSection1
{size:8.5in 11.0in;
margin:1.0in 1.0in 1.0in 1.0in;}
div.WordSection1
{page:WordSection1;}
--></style><!--[if gte mso 9]><xml>
<o:shapedefaults v:ext="edit" spidmax="1026" />
</xml><![endif]--><!--[if gte mso 9]><xml>
<o:shapelayout v:ext="edit">
<o:idmap v:ext="edit" data="1" />
</o:shapelayout></xml><![endif]-->
</head>
<body lang="EN-US" link="#467886" vlink="#96607D" style="word-wrap:break-word">
<div class="WordSection1">
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif">Hi Chris,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif">Are you running DOE2.2 or DOE2.3?<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;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).<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;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”.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;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.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;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.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif">Regards,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif">~Bill<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif"><o:p> </o:p></span></p>
<div>
<table class="MsoNormalTable" border="0" cellspacing="0" cellpadding="0">
<tbody>
<tr>
<td colspan="2" style="padding:0in 0in 0in 0in">
<p style="margin:0in"><b><span style="font-size:10.0pt;font-family:"Arial",sans-serif;color:black">William Bishop</span></b><span style="font-size:9.0pt;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:#B9B9B9">|</span><span style="font-size:9.0pt;font-family:"Arial",sans-serif;color:black"> Associate Principal | Project Executive | Sustainability & Energy</span><span style="font-size:10.0pt;font-family:"Arial",sans-serif;color:black"><o:p></o:p></span></p>
</td>
</tr>
<tr>
<td nowrap="" colspan="2" style="padding:7.5pt 0in 7.5pt 0in">
<p class="MsoNormal"><a href="https://www.imegcorp.com/"><span style="color:#1C4678;text-decoration:none"><img border="0" width="119" height="28" style="width:1.2395in;height:.2916in" id="_x0000_i1031" src="https://stationerycentral.com/2025/imeg-logo-238x56.png" alt="IMEG"></span></a><o:p></o:p></p>
</td>
</tr>
<tr>
<td nowrap="" colspan="2" style="padding:0in 0in 7.5pt 0in">
<p style="margin:0in"><span style="font-size:9.0pt;font-family:"Arial",sans-serif;color:black">134 South Fitzhugh Street </span><span style="font-size:7.5pt;font-family:"Arial",sans-serif;color:#B9B9B9">|</span><span style="font-size:9.0pt;font-family:"Arial",sans-serif;color:black"> Rochester </span><span style="font-size:7.5pt;font-family:"Arial",sans-serif;color:#B9B9B9">|</span><span style="font-size:9.0pt;font-family:"Arial",sans-serif;color:black"> NY, 14608<o:p></o:p></span></p>
</td>
</tr>
<tr>
<td nowrap="" colspan="2" style="padding:0in 0in 0in 0in"></td>
</tr>
<tr>
<td nowrap="" colspan="2" style="padding:4.5pt 0in 3.0pt 0in">
<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:#1C4678">|</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 href="%3c!--liURL--%3e"><span style="color:#1C4678;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:#1C4678">|</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 href="%3c!--vcardURL--%3e"><span style="color:#1C4678;text-decoration:none">vCard</span></a>
</span></b><o:p></o:p></p>
</td>
</tr>
<tr>
<td nowrap="" style="padding:4.5pt 0in 6.0pt 0in">
<p style="margin:0in"><b><span style="font-size:7.5pt;font-family:"Arial",sans-serif;color:#1C4678"><a href="https://www.imegcorp.com"><span style="color:#1C4678;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"><span style="color:#1C4678;text-decoration:none">map</span></a> | <a href="https://imegcorp.com/about/news-events/"><span style="color:#1C4678;text-decoration:none">IMEG News</span></a><o:p></o:p></span></b></p>
</td>
<td width="100%" nowrap="" style="width:100.0%;padding:5.25pt 0in 6.75pt 6.0pt">
<p class="MsoNormal"><a href="http://twitter.com/IMEGcorp"><span style="font-size:1.0pt;color:#1C4678;text-decoration:none"><img border="0" width="17" height="17" style="width:.177in;height:.177in" id="_x0000_i1030" src="https://stationerycentral.com/2025/imeg-x-34x34.png" alt="X, formerly Twitter"></span></a><span style="font-size:1.0pt"><img border="0" width="5" height="5" style="width:.052in;height:.052in" id="_x0000_i1029" src="https://stationerycentral.com/images/clear.gif" alt="spacer"></span><a href="https://www.facebook.com/IMEGcorp/"><span style="font-size:1.0pt;color:#1C4678;text-decoration:none"><img border="0" width="17" height="17" style="width:.177in;height:.177in" id="_x0000_i1028" src="https://stationerycentral.com/2023/imeg-fb-34x34.png" alt="Facebook"></span></a><span style="font-size:1.0pt"><img border="0" width="5" height="5" style="width:.052in;height:.052in" id="_x0000_i1027" src="https://stationerycentral.com/images/clear.gif" alt="spacer"></span><a href="https://www.linkedin.com/company/imeg-corp"><span style="font-size:1.0pt;color:#1C4678;text-decoration:none"><img border="0" width="17" height="17" style="width:.177in;height:.177in" id="_x0000_i1026" src="https://stationerycentral.com/2023/imeg-li-34x34.png" alt="LinkedIn"></span></a><span style="font-size:1.0pt"><o:p></o:p></span></p>
</td>
</tr>
<tr>
<td colspan="2" style="padding:0in 0in 6.75pt 0in">
<p style="margin:0in"><span style="font-size:8.0pt;font-family:"Arial",sans-serif;color:black"><a href="https://www.imegcorp.com/about/our-story/"><span style="color:black">Learn more</span></a> about us and the IMEG story!<o:p></o:p></span></p>
</td>
</tr>
</tbody>
</table>
<p class="MsoNormal"><span style="display:none"><o:p> </o:p></span></p>
</div>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif"><o:p> </o:p></span></p>
<div>
<div style="border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in 0in 0in">
<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 <equest-users-bounces@lists.onebuilding.org>
<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> equest-users@lists.onebuilding.org<br>
<b>Subject:</b> [Equest-users] Heat Pump Chiller - Anyone know the Rating Conditions<o:p></o:p></span></p>
</div>
</div>
<p class="MsoNormal"><o:p> </o:p></p>
<div style="border:solid #9C6500 1.0pt;padding:0in 0in 0in 0in">
<p class="MsoNormal" style="background:#FFFF99"><strong><span style="font-size:10.0pt;font-family:"Aptos",sans-serif;color:#9C6500;background:#FFFF99">External Email:
</span></strong><span style="font-size:10.0pt;color:black;background:#FFFF99">Treat links and attachments with caution.</span><o:p></o:p></p>
</div>
<div>
<div>
<p class="MsoNormal">Hi All, <o:p></o:p></p>
<div>
<p class="MsoNormal"><o:p> </o:p></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.<o:p></o:p></p>
</div>
<div>
<p class="MsoNormal"><img border="0" width="542" height="378" style="width:5.6458in;height:3.9375in" id="Picture_x0020_1" src="cid:image001.png@01DCE887.42E364E0"><o:p></o:p></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 ):<o:p></o:p></p>
</div>
<div>
<p class="MsoNormal"><o:p> </o:p></p>
</div>
<div>
<table class="MsoNormalTable" border="0" cellspacing="0" cellpadding="0" width="457" style="width:343.0pt;border-collapse:collapse">
<tbody>
<tr style="height:15.0pt">
<td width="159" nowrap="" valign="bottom" style="width:119.0pt;padding:0in 0in 0in 0in;height:15.0pt;border-color:currentcolor">
<p class="MsoNormal" align="right" style="text-align:right"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:black">SWT -><o:p></o:p></span></p>
</td>
<td width="64" nowrap="" valign="bottom" style="width:48.0pt;border:solid windowtext 1.0pt;padding:0in 0in 0in 0in;height:15.0pt">
<p class="MsoNormal" align="right" style="text-align:right"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:black">120<o:p></o:p></span></p>
</td>
<td width="64" nowrap="" valign="bottom" style="width:48.0pt;border:solid windowtext 1.0pt;border-left:none;padding:0in 0in 0in 0in;height:15.0pt;border-color:currentcolor">
<p class="MsoNormal" align="right" style="text-align:right"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:black">115<o:p></o:p></span></p>
</td>
<td width="64" nowrap="" valign="bottom" style="width:48.0pt;border:solid windowtext 1.0pt;border-left:none;background:yellow;padding:0in 0in 0in 0in;height:15.0pt;border-color:currentcolor">
<p class="MsoNormal" align="right" style="text-align:right"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:black">115.6816<o:p></o:p></span></p>
</td>
<td width="43" nowrap="" valign="bottom" style="width:32.0pt;border:solid windowtext 1.0pt;border-left:none;padding:0in 0in 0in 0in;height:15.0pt;border-color:currentcolor">
<p class="MsoNormal" align="right" style="text-align:right"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:black">105<o:p></o:p></span></p>
</td>
<td width="64" nowrap="" valign="bottom" style="width:48.0pt;border:solid windowtext 1.0pt;border-left:none;background:yellow;padding:0in 0in 0in 0in;height:15.0pt;border-color:currentcolor">
<p class="MsoNormal" align="right" style="text-align:right"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:black">112.2388<o:p></o:p></span></p>
</td>
</tr>
<tr style="height:15.0pt">
<td nowrap="" valign="bottom" style="padding:0in 0in 0in 0in;height:15.0pt;border-color:currentcolor">
<p class="MsoNormal" align="right" style="text-align:right"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:black">OAT -><o:p></o:p></span></p>
</td>
<td nowrap="" valign="bottom" style="border:solid windowtext 1.0pt;border-top:none;background:yellow;padding:0in 0in 0in 0in;height:15.0pt;border-color:currentcolor windowtext windowtext">
<p class="MsoNormal" align="right" style="text-align:right"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:black">54.36586<o:p></o:p></span></p>
</td>
<td nowrap="" valign="bottom" style="border-top:none;border-left:none;border-bottom:solid windowtext 1.0pt;border-right:solid windowtext 1.0pt;background:yellow;padding:0in 0in 0in 0in;height:15.0pt;border-color:currentcolor windowtext windowtext currentcolor">
<p class="MsoNormal" align="right" style="text-align:right"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:black">61.10728<o:p></o:p></span></p>
</td>
<td nowrap="" valign="bottom" style="border-top:none;border-left:none;border-bottom:solid windowtext 1.0pt;border-right:solid windowtext 1.0pt;padding:0in 0in 0in 0in;height:15.0pt;border-color:currentcolor windowtext windowtext currentcolor">
<p class="MsoNormal" align="right" style="text-align:right"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:black">47<o:p></o:p></span></p>
</td>
<td nowrap="" valign="bottom" style="border-top:none;border-left:none;border-bottom:solid windowtext 1.0pt;border-right:solid windowtext 1.0pt;background:yellow;padding:0in 0in 0in 0in;height:15.0pt;border-color:currentcolor windowtext windowtext currentcolor">
<p class="MsoNormal" align="right" style="text-align:right"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:black">39.21<o:p></o:p></span></p>
</td>
<td nowrap="" valign="bottom" style="border-top:none;border-left:none;border-bottom:solid windowtext 1.0pt;border-right:solid windowtext 1.0pt;padding:0in 0in 0in 0in;height:15.0pt;border-color:currentcolor windowtext windowtext currentcolor">
<p class="MsoNormal" align="right" style="text-align:right"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:black">44<o:p></o:p></span></p>
</td>
</tr>
<tr style="height:15.0pt">
<td nowrap="" valign="bottom" style="padding:0in 0in 0in 0in;height:15.0pt;border-color:currentcolor">
<p class="MsoNormal" align="right" style="text-align:right"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:black">Goal Seek set to 1.000 -><o:p></o:p></span></p>
</td>
<td nowrap="" valign="bottom" style="border:solid windowtext 1.0pt;border-top:none;padding:0in 0in 0in 0in;height:15.0pt;border-color:currentcolor windowtext windowtext">
<p class="MsoNormal" align="right" style="text-align:right"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:black">1.003649<o:p></o:p></span></p>
</td>
<td nowrap="" valign="bottom" style="border-top:none;border-left:none;border-bottom:solid windowtext 1.0pt;border-right:solid windowtext 1.0pt;padding:0in 0in 0in 0in;height:15.0pt;border-color:currentcolor windowtext windowtext currentcolor">
<p class="MsoNormal" align="right" style="text-align:right"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:black">0.999675<o:p></o:p></span></p>
</td>
<td nowrap="" valign="bottom" style="border-top:none;border-left:none;border-bottom:solid windowtext 1.0pt;border-right:solid windowtext 1.0pt;padding:0in 0in 0in 0in;height:15.0pt;border-color:currentcolor windowtext windowtext currentcolor">
<p class="MsoNormal" align="right" style="text-align:right"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:black">0.99995<o:p></o:p></span></p>
</td>
<td nowrap="" valign="bottom" style="border-top:none;border-left:none;border-bottom:solid windowtext 1.0pt;border-right:solid windowtext 1.0pt;padding:0in 0in 0in 0in;height:15.0pt;border-color:currentcolor windowtext windowtext currentcolor">
<p class="MsoNormal" align="right" style="text-align:right"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:black">1<o:p></o:p></span></p>
</td>
<td nowrap="" valign="bottom" style="border-top:none;border-left:none;border-bottom:solid windowtext 1.0pt;border-right:solid windowtext 1.0pt;padding:0in 0in 0in 0in;height:15.0pt;border-color:currentcolor windowtext windowtext currentcolor">
<p class="MsoNormal" align="right" style="text-align:right"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:black">0.999975<o:p></o:p></span></p>
</td>
</tr>
</tbody>
</table>
</div>
<div>
<p class="MsoNormal"><o:p> </o:p></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.<o:p></o:p></p>
</div>
<div>
<p class="MsoNormal"><o:p> </o:p></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?<o:p></o:p></p>
</div>
<div>
<p class="MsoNormal"><o:p> </o:p></p>
</div>
<div>
<p class="MsoNormal">Thanks,<o:p></o:p></p>
</div>
<div>
<p class="MsoNormal">Chris<o:p></o:p></p>
</div>
</div>
</div>
</div>
</body>
</html>