<html><head></head><body><div style="color:#000; background-color:#fff; font-family:verdana, helvetica, sans-serif;font-size:16px"><div id="yui_3_16_0_ym19_1_1489095504548_19267"><span id="yui_3_16_0_ym19_1_1489095504548_19289">Two cents from the Old Guy..</span></div><div id="yui_3_16_0_ym19_1_1489095504548_19267"><span><br></span></div><div id="yui_3_16_0_ym19_1_1489095504548_19267"><span id="yui_3_16_0_ym19_1_1489095504548_19397">I did an eQuest model for a house in Southern California for the gas Company. Changed lighting wall R-value and window treatment. Wall impact was much as Michael found it. Biggest impact was window treatment..and that was in the 2-4% range.</span></div><div id="yui_3_16_0_ym19_1_1489095504548_19267"><span><br></span></div><div id="yui_3_16_0_ym19_1_1489095504548_19267" dir="ltr"><span id="yui_3_16_0_ym19_1_1489095504548_19693">Insulation has its greatest impact on heating. Window treatment on cooling. It also depends on how much outside surface touches the building. Interior rooms never see the sun (or the Moon).</span></div><div id="yui_3_16_0_ym19_1_1489095504548_19267" dir="ltr"><span><br></span></div><div id="yui_3_16_0_ym19_1_1489095504548_19267" dir="ltr"><span id="yui_3_16_0_ym19_1_1489095504548_19690">Michael's results are not a mystery in most places in the contiguous US. Northern Canada or Finland, maybe more.</span></div><div id="yui_3_16_0_ym19_1_1489095504548_19267" dir="ltr"><span><br></span></div><div id="yui_3_16_0_ym19_1_1489095504548_19267" dir="ltr"><span>John R. Aulbach, PE</span></div> <div class="qtdSeparateBR"><br><br></div><div class="yahoo_quoted" style="display: block;"> <div style="font-family: verdana, helvetica, sans-serif; font-size: 16px;"> <div style="font-family: HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif; font-size: 16px;"> <div dir="ltr"><font size="2" face="Arial"> On Thursday, March 9, 2017 12:52 PM, Nathan Miller via Equest-users <equest-users@lists.onebuilding.org> wrote:<br></font></div> <br><br> <div class="y_msg_container"><div id="yiv6968246943"><style>#yiv6968246943 #yiv6968246943 --
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<div class="yiv6968246943MsoNormal"><span style="font-size:11.0pt;">Don’t know where your building is located, but on the Seattle area multifamily projects we routinely model, envelope has very little impact on building energy
use. DHW and ventilation seem to be the items we have the most influence over that really can change the energy consumption.
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<div class="yiv6968246943MsoNormal"><span style="font-size:11.0pt;">FWIW, many of us in the Seattle market are starting to believe the standard plug/misc load assumptions from the Energy Star MF High Rise Sim Guidelines (if you
are using them) overestimate that energy use, and result in more “free heat” in the building and thus less sensitivity to envelope changes (among other implications).
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<b><span style="font-size:9.0pt;">Nathan Miller, PE, LEED AP BD+C</span></b><b><span style="font-size:9.0pt;"> –
</span></b><i><span style="font-size:8.0pt;">Mechanical Engineer/Senior Energy Analyst</span></i><b><span style="font-size:9.0pt;"></span></b></div>
<div class="yiv6968246943MsoNormal" style="margin-top:3.0pt;line-height:115%;"><b><span style="font-size:8.0pt;line-height:115%;">RUSHING</span></b><span style="font-size:8.0pt;line-height:115%;">
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</span><b><span style="font-size:8.0pt;line-height:115%;">O</span></b><span style="font-size:8.0pt;line-height:115%;">
</span><span style="font-size:8.0pt;line-height:115%;">206-285-7100 |</span><span style="font-size:8.0pt;line-height:115%;">
</span><b><span style="font-size:8.0pt;line-height:115%;">C</span></b><span style="font-size:8.0pt;line-height:115%;">
</span><span style="font-size:8.0pt;line-height:115%;">207-650-3942</span><span style="font-size:8.0pt;line-height:115%;"></span></div>
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<div class="yiv6968246943yqt6756244083" id="yiv6968246943yqt76966"><div class="yiv6968246943MsoNormal"><b><span style="font-size:11.0pt;">From:</span></b><span style="font-size:11.0pt;"> Equest-users [mailto:equest-users-bounces@lists.onebuilding.org]
<b>On Behalf Of </b>Michael Campbell via Equest-users<br clear="none">
<b>Sent:</b> Thursday, March 09, 2017 3:44 PM<br clear="none">
<b>To:</b> equest-users <equest-users@lists.onebuilding.org><br clear="none">
<b>Subject:</b> [Equest-users] Wall insulation in multifamily buildings</span></div>
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<div class="yiv6968246943MsoNormal" style="margin-bottom:12.0pt;">Hello eQUEST Users,</div>
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<div class="yiv6968246943MsoNormal" style="margin-bottom:12.0pt;">I've been working on a model for a multifamily building, 5 stories, approximately 300,000 square feet. I've been running a few iterations of the model to see how changes to the wall assembly affect the model
results. <br clear="none">
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What I've found is that changes in the wall assembly seem to have a minimal impact on the model results. I just did a comparison where I took an assembly with R-19 cavity insulation and 2" rigid insulation and compared that to the same assembly but without
the rigid insulation. This was applied to the entire building. What I found was only a 0.4% increase in total energy cost after taking out the rigid insulation. I'm wondering if others have found similar results in multifamily buildings?</div>
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<div class="yiv6968246943MsoNormal" style="margin-bottom:12.0pt;">Any input is appreciated.</div>
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<div class="yiv6968246943MsoNormal">Thank you,</div>
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<div class="yiv6968246943MsoNormal">Mike Campbell</div>
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