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<p class="MsoNormal"><span style="font-size:11.0pt">Hey team,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">I have some realworld experience that could specifically help to frame your project or manage client expectations. I needed to address an overheating situation in a facility where my team was working under
duress, without AC a few summers ago. To effectively bridge the gap between subjective discomfort and objective measurements, for a non-technical audience, I relied on measuring RH/DB temps via simple dataloggers, calculating, then plotting the heat index
using NOAA methodology (</span><a href="https://www.wpc.ncep.noaa.gov/html/heatindex_equation.shtml"><span style="font-size:11.0pt">link</span></a><span style="font-size:11.0pt">).<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">This approach was taken specifically because
<o:p></o:p></span></p>
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<li class="MsoListParagraph" style="margin-left:0in;mso-list:l0 level1 lfo3"><span style="font-size:11.0pt">I had a strong bias to communicate the health/safety hazards with and for my staff (involving a pregnancy), to spark action and discourage debate for
a resolution<o:p></o:p></span></li><li class="MsoListParagraph" style="margin-left:0in;mso-list:l0 level1 lfo3"><span style="font-size:11.0pt">NOAA publishes effective/official visuals which helping to characterize how $B!H(Bbad$B!I(B it was – this may concurrently help with assuring tenants when conditions
are in relative terms more or less dangerous:<o:p></o:p></span></li></ol>
<p class="MsoListParagraph"><span style="font-size:11.0pt"><img border="0" width="650" height="380" style="width:6.7708in;height:3.9583in" id="Picture_x0020_1" src="cid:image004.jpg@01DC00AD.5C393EF0"></span><span style="font-size:11.0pt"><o:p></o:p></span></p>
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<li class="MsoListParagraph" style="margin-left:0in;mso-list:l0 level1 lfo3"><span style="font-size:11.0pt">I used the same framework to establish a standing policy for sending my staff home<o:p></o:p></span></li></ol>
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<p class="MsoNormal"><b><span style="font-family:"Arial",sans-serif;color:#3A7A46;mso-ligatures:standardcontextual">Nick Caton, P.E. (US), BEMP<o:p></o:p></span></b></p>
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<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"> Bldg-sim <bldg-sim-bounces@lists.onebuilding.org>
<b>On Behalf Of </b>Chris Yates via Bldg-sim<br>
<b>Sent:</b> Tuesday, July 22, 2025 10:56 AM<br>
<b>To:</b> 'Haberl, Jeff' <jhaberl@tamu.edu>; bldg-sim@onebuilding.org<br>
<b>Subject:</b> Re: [Bldg-sim] calibrated comfort modelling<o:p></o:p></span></p>
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<p class="MsoNormal"><o:p> </o:p></p>
<p><span lang="EN-GB" style="color:red">[External email: Use caution with links and attachments]</span><span lang="EN-GB"><o:p></o:p></span></p>
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<p><span lang="EN-GB"> <o:p></o:p></span></p>
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<p class="MsoNormal"><span lang="EN-GB" style="font-size:11.0pt;mso-fareast-language:EN-US">Hi Jeff,<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="font-size:11.0pt;mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="font-size:11.0pt;mso-fareast-language:EN-US">This is food for thought. We$B!G(Bre reviewing a naturally ventilated (free running) building that has summer comfort issues. The scope is purely overheating which is
<u>bad</u> for about two weeks of the year – no energy analysis. We$B!G(Bll probably simulate about 1 month maximum.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="font-size:11.0pt;mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="font-size:11.0pt;mso-fareast-language:EN-US">We can$B!G(Bt hope to establish all of the known unknowns (e.g., glazing performance, local heat island effects). It will be more of an $B!H(Binformative$B!I(B piece of work, but I$B!G(Bm
hoping it will result in some iterations with improved inputs. All the same, I think we need to carefully manage the client$B!G(Bs expectations.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="font-size:11.0pt;mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="font-size:11.0pt;mso-fareast-language:EN-US">Thanks!<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="font-size:11.0pt;mso-fareast-language:EN-US">Chris<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="font-size:11.0pt;mso-fareast-language:EN-US"><o:p> </o:p></span></p>
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<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"> Haberl, Jeff <</span><a href="mailto:jhaberl@tamu.edu"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif">jhaberl@tamu.edu</span></a><span style="font-size:11.0pt;font-family:"Calibri",sans-serif">>
<br>
<b>Sent:</b> 22 July 2025 16:04<br>
<b>To:</b> </span><a href="mailto:bldg-sim@onebuilding.org"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif">bldg-sim@onebuilding.org</span></a><span style="font-size:11.0pt;font-family:"Calibri",sans-serif">;
</span><a href="mailto:chris.malcolm.yates@gmail.com"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif">chris.malcolm.yates@gmail.com</span></a><span style="font-size:11.0pt;font-family:"Calibri",sans-serif"><br>
<b>Subject:</b> Re: [Bldg-sim] calibrated comfort modelling<o:p></o:p></span></p>
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<p class="MsoNormal"><span lang="EN-GB"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span lang="EN-GB" style="color:black">Hello Chris:<o:p></o:p></span></p>
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<p class="MsoNormal"><span lang="EN-GB" style="color:black"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span lang="EN-GB" style="color:black">Actually, you touch on a rather complicated topic, for several reasons.<o:p></o:p></span></p>
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<p class="MsoNormal"><span lang="EN-GB" style="color:black"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span lang="EN-GB" style="color:black">First, many "calibrated building energy simulations" often use small periods of time (1 to 2 weeks) when they try to match the actual interior temperatures and the whole-building energy use. For example,
the following studies tried to match indoor temps for selected periods and then looked at how the simulated whole-building energy use matched the actual energy use: (there's more available at
</span><a href="https://esl.tamu.edu/"><span lang="EN-GB">https://esl.tamu.edu/</span></a><span lang="EN-GB" style="color:black">)<o:p></o:p></span></p>
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<p class="MsoNormal"><span lang="EN-GB" style="color:black"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span lang="EN-GB" style="color:black">Norford, L., Socolow, R., Hsieh, E. Spadaro, J. "Two-to-one discrepancy between measured and predicted performance of a 'low-energy'office building: insights from a reconciliation based on the DOE-2
model", Energy and buildings, 1994 - Elsevier<o:p></o:p></span></p>
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<p class="MsoNormal"><span lang="EN-GB" style="color:black"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span lang="EN-GB" style="color:black">Kim, C., Haberl, J. 2023. $B!H(BImpact of Thermal Zone Modeling on a Small Office Building With All-electric HVAC Systems in Hot-humid and Cold-humid climates, Science and Technology for the Built Environment
(December).<o:p></o:p></span></p>
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<p class="MsoNormal"><span lang="EN-GB" style="color:black"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span lang="EN-GB" style="color:black">Oh, S., Baltazar, J.C., Haberl, J. 2020. $B!H(BAnalysis of zone-by-zone indoor environmental conditions and electricity savings from the use of a smart thermostat: A residential case study$B!I(B, Science and
Technology for the Built Environment, Vol. 26, No. 3, ESL-PA-20-03-02 (March).<o:p></o:p></span></p>
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<p class="MsoNormal"><span lang="EN-GB" style="color:black"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span lang="EN-GB" style="color:black">Zhao, X. 2025 $B!H(BDevelopment of Simplified Building Energy Simulation Models for Atrium Buildings to be Used for Urban-Scale Building Energy Models (UBEM)$B!I(B, PhD Thesis, Department of Architecture, Texas
A&M University, December.<o:p></o:p></span></p>
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<p class="MsoNormal"><span lang="EN-GB" style="color:black"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span lang="EN-GB" style="color:black">Jung, S. 2020 $B!H(BAnalysis of Residential Building Energy Code Compliance for New and Existing Buildings Based on Building Energy Simulation$B!I(B, PhD Thesis, Department of Architecture, Texas A&M University,
December.<o:p></o:p></span></p>
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<p class="MsoNormal"><span lang="EN-GB" style="color:black"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span lang="EN-GB" style="color:black">Kootin-Sanwu, V. 2004 $B!H(BDevelopment of Energy Efficient Housing for Low-Income Families,$B!I(B PhD Thesis, Department of Architecture,<o:p></o:p></span></p>
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<p class="MsoNormal"><span lang="EN-GB" style="color:black">Texas A&M University, May.<o:p></o:p></span></p>
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<p class="MsoNormal"><span lang="EN-GB" style="color:black"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span lang="EN-GB" style="color:black">Problem is that doing this for a whole year can be overwhelmingly problematic since there are often occupants in the building who are unpredictable. Also, often getting multizone temps to match, does
not always help matching the whole building energy use, and vice-versa. <o:p></o:p></span></p>
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<p class="MsoNormal"><span lang="EN-GB" style="color:black"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span lang="EN-GB" style="color:black">In addition, in residential, single family, the concrete slab under the building plays a big role in the heating/cooling, showing up more like seasonality. In many cases, slab temperature is not measured,
or even simulated very well.<o:p></o:p></span></p>
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<p class="MsoNormal"><span lang="EN-GB" style="color:black"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span lang="EN-GB" style="color:black">In several studies indoor temps were regressed against outside temps to create a statistical relationship. Then the equation was used to predict the indoor temps for the whole year. A lot of work.<o:p></o:p></span></p>
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<p class="MsoNormal"><span lang="EN-GB" style="color:black"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span lang="EN-GB" style="color:black">Finally, in all cases you need to have nearby or on-site hourly weather measurements, including temp, humidity, solar, wind speed which is very time consuming if you don't have a nearby feed to tap
into. Also, calibration of these sensors is non-trivial.<o:p></o:p></span></p>
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<p class="MsoNormal"><span lang="EN-GB" style="color:black"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span lang="EN-GB" style="color:black">At best we've used the term "two way" calibration, to indicate some effort to match indoor temps and whole-building energy use. This quickly becomes 3,4,5-way calibrations when you try to match other
indoor conditions, like humidity, HVAC cycling (which you can see using high frequency data), slab temps, natural ventilation, etc.<o:p></o:p></span></p>
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<p class="MsoNormal"><span lang="EN-GB" style="color:black">So, to sum it up...its complicated...and an endless source of thesis material.<o:p></o:p></span></p>
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<p class="MsoNormal"><span lang="EN-GB" style="color:black"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span lang="EN-GB" style="color:black">Jeff<o:p></o:p></span></p>
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<div id="Signature">
<p class="elementtoproof"><span lang="EN-GB" style="font-family:"Calibri",sans-serif">Jeff S. Haberl, Ph.D., P.E.inactive, FASHRAE, FIBPSA <i>We are like fluttering leaves on the branches of trees</i></span><span lang="EN-GB"><o:p></o:p></span></p>
<p class="elementtoproof"><span lang="EN-GB" style="font-family:"Calibri",sans-serif">Liz & Nelson Mitchell Professor in Residential Design <i>in the forest of the landscape that surrounds us.</i></span><span lang="EN-GB"><o:p></o:p></span></p>
<p class="elementtoproof"><span lang="EN-GB" style="font-family:"Calibri",sans-serif">Department of Architecture <i>If we could, for just a moment, flutter together,</i> </span><span lang="EN-GB"><o:p></o:p></span></p>
<p class="elementtoproof"><span lang="EN-GB" style="font-family:"Calibri",sans-serif">Texas A&M University
<i>we could lift the earth up to be a better place. JSH</i> 2022</span><span lang="EN-GB"><o:p></o:p></span></p>
<p class="elementtoproof"><span lang="EN-GB" style="font-family:"Calibri",sans-serif">College Station, TX 77845-3581 </span><span lang="EN-GB"><o:p></o:p></span></p>
<p class="elementtoproof"><span lang="EN-GB" style="font-family:"Calibri",sans-serif">Office: 979-845-6507, Lab: 979-845-6065</span><span lang="EN-GB"><o:p></o:p></span></p>
<p class="elementtoproof"><span lang="EN-GB" style="font-family:"Calibri",sans-serif">Fax 979-862-2457</span><span lang="EN-GB"><o:p></o:p></span></p>
<p class="elementtoproof"><a href="mailto:jhaberl@tamu.edu,www.esl.tamu.edu"><span lang="EN-GB" style="font-family:"Calibri",sans-serif">jhaberl@tamu.edu,www.esl.tamu.edu</span></a><span lang="EN-GB"><o:p></o:p></span></p>
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<p class="MsoNormal"><b><span lang="EN-GB" style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:black">From:</span></b><span lang="EN-GB" style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:black"> Bldg-sim <</span><a href="mailto:bldg-sim-bounces@lists.onebuilding.org"><span lang="EN-GB" style="font-size:11.0pt;font-family:"Calibri",sans-serif">bldg-sim-bounces@lists.onebuilding.org</span></a><span lang="EN-GB" style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:black">>
on behalf of Chris Yates via Bldg-sim <</span><a href="mailto:bldg-sim@lists.onebuilding.org"><span lang="EN-GB" style="font-size:11.0pt;font-family:"Calibri",sans-serif">bldg-sim@lists.onebuilding.org</span></a><span lang="EN-GB" style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:black">><br>
<b>Sent:</b> Tuesday, July 22, 2025 7:42 AM<br>
<b>To:</b> </span><a href="mailto:bldg-sim@onebuilding.org"><span lang="EN-GB" style="font-size:11.0pt;font-family:"Calibri",sans-serif">bldg-sim@onebuilding.org</span></a><span lang="EN-GB" style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:black">
<</span><a href="mailto:bldg-sim@onebuilding.org"><span lang="EN-GB" style="font-size:11.0pt;font-family:"Calibri",sans-serif">bldg-sim@onebuilding.org</span></a><span lang="EN-GB" style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:black">><br>
<b>Subject:</b> [Bldg-sim] calibrated comfort modelling</span><span lang="EN-GB">
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<p class="MsoNormal" style="mso-line-height-alt:.75pt"><span lang="EN-GB" style="font-size:1.0pt;color:white">Hello bldg-sim$B!G(Brs! Calibrated *energy* modelling is (relatively) well understood. However, can anybody point to any work in calibrated *comfort* simulation
– academic or otherwise. The only work I$B!G(Bm aware of is based on overheating<o:p></o:p></span></p>
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<p class="xmsonormal"><span lang="EN-GB">Hello bldg-sim$B!G(Brs!<o:p></o:p></span></p>
<p class="xmsonormal"><span lang="EN-GB"> <o:p></o:p></span></p>
<p class="xmsonormal"><span lang="EN-GB">Calibrated *<b>energy</b>* modelling is (relatively) well understood. However, can anybody point to any work in calibrated *<b>comfort</b>* simulation – academic or otherwise.<o:p></o:p></span></p>
<p class="xmsonormal"><span lang="EN-GB"> <o:p></o:p></span></p>
<p class="xmsonormal"><span lang="EN-GB">The only work I$B!G(Bm aware of is based on overheating in residential dwellings in the UK by Dr Ben Roberts of Loughborough University
</span><a href="https://urldefense.com/v3/__https:/journals.sagepub.com/doi/10.1177/0143624419847349__;!!KwNVnqRv!EO5sd_mm8OpR9qOHCZ_4LnmcMUN7KRXRCovgsm-U8LxFIsUmGohkuFxiCKHYDoFGcxS2O1ME9Y5tvtuqLWNYQCGXowY$"><span lang="EN-GB">https://journals.sagepub.com/doi/10.1177/0143624419847349</span></a><span lang="EN-GB"><o:p></o:p></span></p>
<p class="xmsonormal"><span lang="EN-GB"> <o:p></o:p></span></p>
<p class="xmsonormal"><span lang="EN-GB">Is anybody aware of any other work done out there?<o:p></o:p></span></p>
<p class="xmsonormal"><span lang="EN-GB"> <o:p></o:p></span></p>
<p class="xmsonormal"><span lang="EN-GB">Cheers<o:p></o:p></span></p>
<p class="xmsonormal"><span lang="EN-GB">Chris<o:p></o:p></span></p>
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