<html><head></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; color: rgb(0, 0, 0); font-size: 14px; font-family: Calibri, sans-serif; "><div>In mild weather, with high internal heat gains, the losses through the glazing reduce the cooling load. In this situation, increasing the performance of the glass will cause increased energy consumption. </div><div><br></div><div>This counterintuitive result is often the result of an overestimation of internal heat gains. You should perform a reality check on your internal heat gains, before you determine if this result is correct. </div><div><br></div><div><div>--</div><div><br></div><div>Chris Schaffner, PE</div><div>LEED Fellow</div><div>Founder and Principal</div><div><br></div><div>The Green Engineer, LLP</div><div>Sustainable Design Consulting</div><div>50 Beharrell Street</div><div>Concord, MA 01742</div><div>T: 978.369.8978</div><div>M:978.844.1464</div><div>chris@greenengineer.com</div><div>www.greenengineer.com</div><div><br></div><div>The Green Engineer, LLP is a Certified B Corporation</div></div><div><br></div><span id="OLK_SRC_BODY_SECTION"><div style="font-family:Verdana; font-size:11pt; text-align:left; color:black; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none; PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; PADDING-RIGHT: 0in; BORDER-TOP: #b5c4df 1pt solid; BORDER-RIGHT: medium none; PADDING-TOP: 3pt"><span style="font-weight:bold">From: </span> Omar Osama <<a href="mailto:o_osama@live.com">o_osama@live.com</a>><br><span style="font-weight:bold">Date: </span> Thu, 13 Oct 2011 16:07:13 +0200<br><span style="font-weight:bold">To: </span> <<a href="mailto:equest-users@lists.onebuilding.org">equest-users@lists.onebuilding.org</a>><br><span style="font-weight:bold">Subject: </span> [Equest-users] U-Value unexpected impact<br></div><div><br></div><div><style><!--
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--></style><div class="hmmessage"><div dir="ltr"><font class="Apple-style-span" face="Tahoma" size="2">All,</font><div><font class="Apple-style-span" face="Tahoma" size="2"> I'am modelling a mid-rise, curtain wall, office building in Egypt (hot humid climate 2a). while I do decrease the glazing's U-value, below 0.5, the energy consumption tends to increase. does this issue have a reality related explanation, is it a problem in my file, or is it a software bug issue? </font></div><div><font class="Apple-style-span" size="2"><br></font></div><div><font class="Apple-style-span" face="Arial" size="2"><br></font></div><div><font class="Apple-style-span" face="Arial" size="2">Thanks for consideration,</font></div><div><font class="Apple-style-span" face="Arial" size="2"><br></font></div><div><font class="Apple-style-span" face="Arial" size="2"><span class="Apple-style-span" style="background-color: rgb(255, 255, 255); font-family: Verdana, Arial, Helvetica, sans-serif; ">Omar AlRawi</span><span class="Apple-style-span" style="background-color: rgb(255, 255, 255); font-family: Verdana, Arial, Helvetica, sans-serif; "><br></span><span class="Apple-style-span" style="background-color: rgb(255, 255, 255); font-family: Verdana, Arial, Helvetica, sans-serif; ">Project Engineer
, EA Sustainable Building Consultants</span><span class="Apple-style-span" style="background-color: rgb(255, 255, 255); font-family: Verdana, Arial, Helvetica, sans-serif; "><br></span><span class="Apple-style-span" style="background-color: rgb(255, 255, 255); font-family: Verdana, Arial, Helvetica, sans-serif; "><a class="parsedLink" href="http://www.ea-buildingconsultants.com/" mce_href="http://www.ea-buildingconsultants.com" target="_blank">www.ea-buildingconsultants.com</a></span></font></div> </div></div></div>_______________________________________________
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