<html><head><style type="text/css"><!-- DIV {margin:0px;} --></style></head><body><div style="font-family:times new roman,new york,times,serif;font-size:12pt"><meta http-equiv="x-dns-prefetch-control" content="off"><div style="font-family: times new roman,new york,times,serif; font-size: 12pt;"><div>Thanks a lot for the information. <br><br>The method used in Energy Star is very interesting. Source energy may be the most equiable arrpoach to provide a fair comparison if buildings use different secondary energy sources. However, it may provide more clear relationship between heaing or cooling site energ use intensity and independent variables (HDD, CDD, floor area, etc.) if the regression is implemented for the buidlings of using the same primary and secondary energy form.<br><br>Jim<br><br><br></div><div style="font-family: times new roman,new york,times,serif; font-size: 12pt;"><br><div style="font-family: times new roman,new york,times,serif;
font-size: 12pt;"><font face="Tahoma" size="2"><hr size="1"><b><span style="font-weight: bold;">From:</span></b> David Eldridge <dse@grummanbutkus.com><br><b><span style="font-weight: bold;">To:</span></b> bldg-sim@lists.onebuilding.org<br><b><span style="font-weight: bold;">Sent:</span></b> Sun, 10 April, 2011 18:45:22<br><b><span style="font-weight: bold;">Subject:</span></b> Re: [Bldg-sim] Effect of building size on energy use intensity<br></font><br><style><!--
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--></style><div class="WordSection1"><p class="MsoNormal"><span style="font-size: 11pt; color: rgb(31, 73, 125);">There was a presentation at the SimBuild 2010 in NYC for an office building that was otherwise the same, identifying changes in energy usage due to the shape of the floor plan and quantity of window area.</span></p>
<p class="MsoNormal"><span style="font-size: 11pt; color: rgb(31, 73, 125);"> </span></p><div><p class="MsoNormal"><span style="font-size: 11pt; color: rgb(31, 73, 125);"><a rel="nofollow" target="_blank" href="http://www.ibpsa.us/pub/simbuild2010/technicalPresentations/SB10-PPT-TS02A-03-Baker.pdf">http://www.ibpsa.us/pub/simbuild2010/technicalPresentations/SB10-PPT-TS02A-03-Baker.pdf</a></span></p>
<p class="MsoNormal"><span style="font-size: 11pt; color: rgb(31, 73, 125);"> </span></p><p class="MsoNormal"><span style="font-size: 11pt; color: rgb(31, 73, 125);">David</span></p>
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<p class="MsoNormal"><span style="font-size: 11pt; color: rgb(31, 73, 125);">David S. Eldridge, Jr., P.E., LEED AP BD+C, BEMP, BEAP, HBDP</span><span style="font-size: 11pt; color: rgb(31, 73, 125);"></span></p>
<p class="MsoNormal"><b><span style="font-size: 11pt; color: rgb(36, 64, 97);">Grumman/Butkus Associates</span></b><span style="font-size: 11pt; color: rgb(31, 73, 125);"></span></p>
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<p class="MsoNormal"><b><span style="font-size: 10pt;">From:</span></b><span style="font-size: 10pt;"> <a rel="nofollow" ymailto="mailto:bldg-sim-bounces@lists.onebuilding.org" target="_blank" href="mailto:bldg-sim-bounces@lists.onebuilding.org">bldg-sim-bounces@lists.onebuilding.org</a> [mailto:<a rel="nofollow" ymailto="mailto:bldg-sim-bounces@lists.onebuilding.org" target="_blank" href="mailto:bldg-sim-bounces@lists.onebuilding.org">bldg-sim-bounces@lists.onebuilding.org</a>] <b>On Behalf Of </b>Dahlstrom, Aaron<br>
<b>Sent:</b> Friday, April 08, 2011 9:11 AM<br><b>To:</b> Jin Minming; <a rel="nofollow" ymailto="mailto:bldg-sim@lists.onebuilding.org" target="_blank" href="mailto:bldg-sim@lists.onebuilding.org">bldg-sim@lists.onebuilding.org</a><br><b>Subject:</b> Re: [Bldg-sim] Effect of building size on energy use intensity</span></p>
</div></div><p class="MsoNormal"> </p><p class="MsoNormal"><span style="">Jim: </span></p><p class="MsoNormal"><span style=""> </span></p>
<p class="MsoNormal"><span style="">Have you seen the Energy Star Technical Methodologies?</span></p><p class="MsoNormal"><span style=""> </span></p>
<p class="MsoNormal"><span style=""><a rel="nofollow" target="_blank" href="http://www.energystar.gov/index.cfm?c=evaluate_performance.bus_portfoliomanager_model_tech_desc">http://www.energystar.gov/index.cfm?c=evaluate_performance.bus_portfoliomanager_model_tech_desc</a></span></p>
<p class="MsoNormal"><span style=""> </span></p><p class="MsoNormal"><span style="">It shows the regressions they ran on the CBECS database to determine the Energy Star predicted Source EUI.</span></p>
<p class="MsoNormal"><span style=""> </span></p><p class="MsoNormal"><span style="">This delves into similar issues – for example, in the Office Tech Description, they discuss the correlation between the natural log of Building Area and Source EUI.</span></p>
<p class="MsoNormal"><span style=""> </span></p><div><p class="MsoNormal" style="line-height: 150%;"><b><span style="font-size: 9pt; line-height: 150%; color: gray;">Aaron Dahlstrom , PE, LEED® AP</span></b><span style="font-size: 11pt; line-height: 150%;"></span></p>
<p class="MsoNormal" style="line-height: 150%;"><b><span style="font-size: 11pt; line-height: 150%; color: rgb(23, 54, 93);">In P</span></b><b><span style="font-size: 11pt; line-height: 150%; color: rgb(97, 148, 40);">o</span></b><b><span style="font-size: 11pt; line-height: 150%; color: rgb(23, 54, 93);">sse</span></b><span style="font-size: 9pt; line-height: 150%; color: gray;"> – </span><span style="font-size: 8pt; line-height: 150%; color: gray;">A subsidiary of</span><span style="font-size: 9pt; line-height: 150%; color: gray;"> </span><b><span style="font-size: 9pt; line-height: 150%; color: rgb(204, 0, 0);">AKF</span></b><span style="font-size: 9pt; line-height: 150%; color: gray;">| 1500 Walnut Street, Suite 1414, Philadelphia, PA 19102 </span><span style="font-size: 11pt; line-height: 150%;"></span></p>
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<p class="MsoNormal" style=""><span style="font-size: 9pt; color: gray;">e: <a rel="nofollow" ymailto="mailto:ADahlstrom@in-posse.com" target="_blank" href="mailto:ADahlstrom@in-posse.com">ADahlstrom@in-posse.com</a> | in posse web: <a rel="nofollow" target="_blank" href="http://www.in-posse.com/">www.in-posse.com</a> | akf web: <a rel="nofollow" target="_blank" href="http://www.akfgroup.com/">www.akfgroup.com</a></span><span style="font-size: 11pt;"></span></p>
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<p class="MsoNormal"><b><span style="font-size: 10pt;">From:</span></b><span style="font-size: 10pt;"> <a rel="nofollow" ymailto="mailto:bldg-sim-bounces@lists.onebuilding.org" target="_blank" href="mailto:bldg-sim-bounces@lists.onebuilding.org">bldg-sim-bounces@lists.onebuilding.org</a> [mailto:<a rel="nofollow" ymailto="mailto:bldg-sim-bounces@lists.onebuilding.org" target="_blank" href="mailto:bldg-sim-bounces@lists.onebuilding.org">bldg-sim-bounces@lists.onebuilding.org</a>] <b>On Behalf Of </b>Jin Minming<br>
<b>Sent:</b> Thursday, April 07, 2011 4:22 PM<br><b>To:</b> <a rel="nofollow" ymailto="mailto:bldg-sim@lists.onebuilding.org" target="_blank" href="mailto:bldg-sim@lists.onebuilding.org">bldg-sim@lists.onebuilding.org</a><br><b>Subject:</b> [Bldg-sim] Effect of building size on energy use intensity</span></p>
</div></div><p class="MsoNormal"> </p><div><div><p class="MsoNormal" style="margin-bottom: 12pt;">Dear all,<br><br>Building size (or floor area) should have some influences on energy use intensity (Btu per sq ft). Roughly speaking, heating energy use intensity may decrease if the building size increases due to less surface area exposed to the outside. However, cooling and lighting energy intensity (usually electricity) may increase for the same reason. This sounds the case from a report below except for small buildings (less than 5000 sq ft),<br>
“A Look at Commercial Buildings in 1995: Characteristics, Energy Consumption, and Energy Expenditures” <br><br>Anyone know there are some reports or research about detailed analysis about influenences of floorspace on energy use intensity?<br>
<br>Thanks,<br><br>Jim<span style="color: rgb(31, 73, 125);"></span></p></div></div></div></div></div>
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