<html><head><meta http-equiv="content-type" content="text/html; charset=utf-8"></head><body dir="auto"><br id="lineBreakAtBeginningOfSignature"><div dir="ltr"><p class="MsoNormal" style="-webkit-text-size-adjust: auto; margin: 0in;"><span style="font-size: 12pt;">Good Morning, Chris.<o:p></o:p></span></p><p class="MsoNormal" style="-webkit-text-size-adjust: auto; margin: 0in;"><span style="font-size: 12pt;"> </span></p><p class="MsoNormal" style="-webkit-text-size-adjust: auto; margin: 0in;"><span style="font-size: 12pt;">As explicitly stated in Further Explanations in the EAp Minimum Energy Performance section of the LEED v4 ID+C Reference Guide, the Baseline envelope must be modeled as new construction per Table 5.5 for the project climate zone. Note that this is currently the only rating system that deviates from the standard App G requirements for the envelope. Alternatively, LEED Interpretation 10454 may be used to model the envelope as it exists, but the overall results must use the modified point thresholds table in the LI – generally a 2% or so penalty.<o:p></o:p></span></p><p class="MsoNormal" style="-webkit-text-size-adjust: auto; margin: 0in;"><span style="font-size: 12pt;"> </span></p><p class="MsoNormal" style="margin: 0in;"><span style="font-size: 12pt;">The Baseline HVAC system in ID+C projects is determined on a whole-building basis, not the project area basis as if it was new construction. If the whole building would meet the requirements for System 7, then yes, your project must be modeled as System 7. However, since you stated you were modeling the PC as purchased heating and cooling, then the BC System 7 must also be modeled as purchased heating and cooling per G3.1.1.3.3 modification a. If your whole-building would meet the System 5 requirements, then you would still model System 7 with </span><font size="3">purchased heating and cooling per G3.1.1.3.3 modifications <span style="-webkit-text-size-adjust: auto;">a</span> and d. </font></p><p class="MsoNormal" style="margin: 0in;"><font size="3"><br></font></p><p class="MsoNormal" style="-webkit-text-size-adjust: auto; margin: 0in;"></p><div class="x-apple-transform-wrapper" style="-webkit-text-size-adjust: auto; height: 215.472422px;"><span style="font-size: 12pt; transform-origin: 0px 0px; transform: scale(0.517963); width: 303px !important; height: 416px !important; display: inline-block !important;"><img width="561" height="416" id="Picture_x0020_2" src="cid:F58392E1-49F3-491B-9024-F0F2E75EEB9B" _mf_state="1" title="null" alt="image001.png" style="width: 5.8437in; height: 4.3333in;"></span></div><span style="font-size: 12pt; -webkit-text-size-adjust: auto;"><o:p></o:p></span><p style="-webkit-text-size-adjust: auto;"></p><p class="MsoNormal" style="-webkit-text-size-adjust: auto; margin: 0in;"><span style="font-size: 12pt;"> Hope this helps. </span></p><p class="MsoNormal" style="-webkit-text-size-adjust: auto; margin: 0in;"><span style="font-size: 12pt;"><br></span></p><div style="-webkit-text-size-adjust: auto;"><p class="MsoNormal" style="margin: 0in;"><span style="font-size: 12pt; font-family: "Arial Nova", sans-serif; color: rgb(38, 38, 38);">Thanks, and have a nice day.<o:p></o:p></span></p><p class="MsoNormal" style="margin: 0in;"><b><span style="font-size: 10pt; font-family: "Arial Nova", sans-serif; color: rgb(38, 38, 38);"> </span></b></p><p class="MsoNormal" style="margin: 0in;"><b><span style="font-size: 10pt; font-family: "Arial Nova", sans-serif; color: rgb(38, 38, 38);">SHEILA SAGERER</span></b><span style="font-size: 10pt; font-family: "Arial Nova", sans-serif; color: rgb(38, 38, 38);">, EIT | LEED AP BD+C | BEMP </span><span style="font-size: 10pt; font-family: "Arial Nova", sans-serif;"><o:p></o:p></span></p><p class="MsoNormal" style="margin: 0in;"><span style="font-size: 10pt; font-family: "Arial Nova", sans-serif; color: rgb(38, 38, 38);">Senior Analyst, Building Performance Studio</span><span style="font-size: 10pt; font-family: "Arial Nova", sans-serif;"><o:p></o:p></span></p><p class="MsoNormal" style="margin: 0in;"><span style="font-size: 10pt; font-family: "Arial Nova", sans-serif; color: rgb(38, 38, 38);">p: <span dir="ltr" style="color: rgb(70, 120, 134); text-decoration: underline;">404.480.4499 ext. 5</span> c: <span dir="ltr" style="color: rgb(70, 120, 134); text-decoration: underline;">717.341.1496</span></span><span style="font-size: 10pt; font-family: "Arial Nova", sans-serif;"><o:p></o:p></span></p><p class="MsoNormal" style="margin: 0in;"><span style="font-size: 10pt; font-family: "Arial Nova", sans-serif; color: rgb(38, 38, 38);"> </span><span style="font-size: 10pt; font-family: "Arial Nova", sans-serif;"><o:p></o:p></span></p><p class="MsoNormal" style="margin: 0in;"><b><span style="font-size: 10pt; font-family: "Arial Nova", sans-serif; color: rgb(38, 38, 38);">ECOWORKS STUDIO </span></b><span style="font-size: 10pt; 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font-family: Calibri, sans-serif;"> </span><span style="font-family: Calibri, sans-serif;"><o:p></o:p></span></p><p class="MsoNormal" style="margin: 0in;"><span style="font-size: 12pt; font-family: Calibri, sans-serif;"><img border="0" width="33" height="30" id="Picture_x0020_19" src="cid:CC0A8923-3BA9-4FA2-B589-1A8D5E66307C" _mf_state="1" title="null" alt="image002.png" style="width: 0.3437in; height: 0.3125in;"></span></p></div></div><div dir="ltr"><br>On Aug 30, 2024, at 7:29 AM, Chris Yates via Bldg-sim <bldg-sim@lists.onebuilding.org> wrote:<br><br></div><div dir="ltr"><meta http-equiv="Content-Type" content="text/html; charset=us-ascii"><meta name="Generator" content="Microsoft Word 15 (filtered medium)"><style>@font-face { font-family: "Cambria Math"; }
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</o:shapelayout></xml><![endif]--><div class="WordSection1"><p class="MsoNormal">Hello,<o:p></o:p></p><p class="MsoNormal"><o:p> </o:p></p><p class="MsoNormal">I’m modelling a Commercial Interior to LEED v4 ID+C. It’s roughly a single floor with purchased heating and cooling piped in to fan coil terminals and a DOAS.<o:p></o:p></p><p class="MsoNormal"><o:p> </o:p></p><p class="MsoNormal">I’m a unclear regarding the baseline, especially the envelope. Furthermore, the guidance that is given seems to go against my expectation.<o:p></o:p></p><p class="MsoNormal"><o:p> </o:p></p><table class="MsoTableGrid" border="1" cellspacing="0" cellpadding="0" style="border-collapse:collapse;border:none"><tbody><tr style="height:14.05pt"><td width="257" valign="top" style="width:192.55pt;border:solid windowtext 1.0pt;padding:0cm 5.4pt 0cm 5.4pt;height:14.05pt"><p class="MsoNormal">BASELINE <o:p></o:p></p></td><td width="257" valign="top" style="width:192.6pt;border:solid windowtext 1.0pt;border-left:none;padding:0cm 5.4pt 0cm 5.4pt;height:14.05pt"><p class="MsoNormal">My expectation<o:p></o:p></p></td><td width="257" valign="top" style="width:192.6pt;border:solid windowtext 1.0pt;border-left:none;padding:0cm 5.4pt 0cm 5.4pt;height:14.05pt"><p class="MsoNormal">What LEED seems to say<o:p></o:p></p></td></tr><tr style="height:41.5pt"><td width="257" valign="top" style="width:192.55pt;border:solid windowtext 1.0pt;border-top:none;padding:0cm 5.4pt 0cm 5.4pt;height:41.5pt"><p class="MsoNormal">Envelope<o:p></o:p></p></td><td width="257" valign="top" style="width:192.6pt;border-top:none;border-left:none;border-bottom:solid windowtext 1.0pt;border-right:solid windowtext 1.0pt;padding:0cm 5.4pt 0cm 5.4pt;height:41.5pt"><p class="MsoNormal">As existing shell<o:p></o:p></p></td><td width="257" valign="top" style="width:192.6pt;border-top:none;border-left:none;border-bottom:solid windowtext 1.0pt;border-right:solid windowtext 1.0pt;padding:0cm 5.4pt 0cm 5.4pt;height:41.5pt"><p class="MsoNormal">Same as section 5. Explicitly ignore item (f), existing envelope<o:p></o:p></p></td></tr><tr style="height:14.05pt"><td width="257" valign="top" style="width:192.55pt;border:solid windowtext 1.0pt;border-top:none;padding:0cm 5.4pt 0cm 5.4pt;height:14.05pt"><p class="MsoNormal">Chiller/ boiler<o:p></o:p></p></td><td width="257" valign="top" style="width:192.6pt;border-top:none;border-left:none;border-bottom:solid windowtext 1.0pt;border-right:solid windowtext 1.0pt;padding:0cm 5.4pt 0cm 5.4pt;height:14.05pt"><p class="MsoNormal">Not in tenants scope so as existing <o:p></o:p></p></td><td width="257" rowspan="2" valign="top" style="width:192.6pt;border-top:none;border-left:none;border-bottom:solid windowtext 1.0pt;border-right:solid windowtext 1.0pt;padding:0cm 5.4pt 0cm 5.4pt;height:14.05pt"><p class="MsoNormal">Not clear but seems to be regular App G/ System 7, etc.<o:p></o:p></p></td></tr><tr style="height:13.3pt"><td width="257" valign="top" style="width:192.55pt;border:solid windowtext 1.0pt;border-top:none;padding:0cm 5.4pt 0cm 5.4pt;height:13.3pt"><p class="MsoNormal">DOAS<o:p></o:p></p></td><td width="257" valign="top" style="width:192.6pt;border-top:none;border-left:none;border-bottom:solid windowtext 1.0pt;border-right:solid windowtext 1.0pt;padding:0cm 5.4pt 0cm 5.4pt;height:13.3pt"><p class="MsoNormal">Not in tenants scope so as existing <o:p></o:p></p></td></tr></tbody></table><p class="MsoNormal"><o:p> </o:p></p><p class="MsoNormal">I have a the 2011 version of “Advanced Energy Modelling for LEED” and can’t seem to find any more detail in there.<o:p></o:p></p><p class="MsoNormal"><o:p> </o:p></p><p class="MsoNormal">Are there any good, current, prescriptive sources for how to model this? Or any simple answers?!<o:p></o:p></p><p class="MsoNormal"><o:p> </o:p></p><p class="MsoNormal">Kind regards<o:p></o:p></p><p class="MsoNormal"><o:p> </o:p></p><p class="MsoNormal"><span style="mso-ligatures:none;mso-fareast-language:EN-GB">Chris Yates C Eng MCIBSE LCEA</span><span style="mso-ligatures:none"><o:p></o:p></span></p><p class="MsoNormal"><o:p> </o:p></p></div><span>_______________________________________________</span><br><span>Bldg-sim mailing list</span><br><span>http://lists.onebuilding.org/listinfo.cgi/bldg-sim-onebuilding.org</span><br><span>To unsubscribe from this mailing list send a blank message to BLDG-SIM-UNSUBSCRIBE@ONEBUILDING.ORG</span><br></div></body></html>