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</o:shapelayout></xml><![endif]--></head><body lang=EN-US link=blue vlink=purple style='text-justify-trim:punctuation'><div class=WordSection1><p class=MsoNormal><span style='font-size:11.0pt;color:#1F497D'>Hello, Yu,<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;color:#1F497D'>The difference may be due to eQUEST¡¯S air density correction based on the elevation of your project location. The auto-calculated value is adjusted for the altitude. The air flow you enter is assumed to be at sea level (standard conditions). If this density correction calculation is causing the difference you see, then changing the elevation to 0 feet should get them to match. To change the elevation, in the Detailed Interface click on ¡°Project & Site¡± in the upper left, then in the Component Tree on the left side double-click on ¡°Site Data¡± (4<sup>th</sup> one down from the top). The field for Altitude is near the middle of the Basic Specifications tab.<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;color:#1F497D'><o:p> </o:p></span></p><div><div><p class=MsoNormal align=left style='text-align:left'><span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:#1F497D'>________________________________</span><span style='font-size:12.0pt;font-family:"Times New Roman","serif";color:#1F497D'><o:p></o:p></span></p><p class=MsoNormal align=left style='text-align:left'><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'><ns0:PersonName><span style='color:#1F497D'>Keith Swartz</span></ns0:PersonName><span style='color:#1F497D'>, P.E., LEED AP</span></span><span style='font-size:12.0pt;font-family:"Times New Roman","serif";color:#1F497D'><o:p></o:p></span></p><p class=MsoNormal align=left style='text-align:left'><span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:#1F497D'><br>Energy Engineer / Senior Project Manager<br></span><b><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'><ns0:PlaceName><span style='color:#1F497D'>Energy</span></ns0:PlaceName><span style='color:#1F497D'> </span><ns0:PlaceType><span style='color:#1F497D'>Center</span></ns0:PlaceType><span style='color:#1F497D'> of </span><ns0:place><ns0:State><span style='color:#1F497D'>Wisconsin</span><span style='color:#1F497D;font-weight:normal'><br></span><span style='font-weight:normal'></ns0:State></span></ns0:place></span></b><ns0:Street><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'><ns0:address><span style='color:#1F497D'>455 Science Drive, Suite 200, </span></ns0:address></ns0:Street></span><ns0:place><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'><ns0:City><span style='color:#1F497D'>Madison</span></ns0:City><span style='color:#1F497D'>, </span><ns0:State><span style='color:#1F497D'>WI</span></ns0:State><span style='color:#1F497D'> </span><ns0:PostalCode><span style='color:#1F497D'>53711<br></span></ns0:PostalCode></ns0:place></span><span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:#1F497D'>Phone: 608.238.8276 x123<br>Fax: 608.238.0523<br><br></span><b><span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:#1F497D'>The Buildings Team</span></b><span style='font-size:12.0pt;font-family:"Times New Roman","serif";color:#1F497D'><o:p></o:p></span></p></div><div><p class=MsoNormal align=left style='text-align:left'><i><span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:#1F497D'>Design decisions through energy, economics and emissions analysis.</span></i><span style='font-size:12.0pt;font-family:"Times New Roman","serif";color:#1F497D'><o:p></o:p></span></p></div><div><p class=MsoNormal align=left style='text-align:left'><span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:#1F497D'><a href="http://www.ecw.org/Buildings">www.ecw.org/Buildings</a> <o:p></o:p></span></p></div></div><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Times New Roman","serif";color:#1F497D'><br></span><b><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'><ns0:place><ns0:PlaceName><span style='color:#1F497D'>Energy</span></ns0:PlaceName><span style='color:#1F497D'> </span><ns0:PlaceType><span style='color:#1F497D'>Center</span></ns0:PlaceType><span style='color:#1F497D'> </span><ns0:PlaceType><span style='color:#1F497D'>University<br></span></ns0:PlaceType></ns0:place></span></b><i><span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:#1F497D'>Your gateway to sustainable design training and online education programs.<br></span></i><span style='font-size:12.0pt;font-family:"Times New Roman","serif";color:#1F497D'><a href="http://www.ecw.org/university/" title="http://www.ecw.org/university/"><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>www.ecw.org/university/</span></a></span><span style='font-size:11.0pt;color:#1F497D'><o:p></o:p></span></p><div><div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in 0in 0in'><p class=MsoNormal align=left style='text-align:left'><b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>From:</span></b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'> </span><span lang=ZH-CN style='font-size:10.0pt;font-family:"SimSun","serif"'>ÁõÓî</span><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'> [mailto:elaneinside@hotmail.com] <br><b>Sent:</b> Sunday, July 10, 2011 10:34 PM<br><b>To:</b> equest-users@lists.onebuilding.org<br><b>Subject:</b> [Equest-users] Problem of design flow rate autosize<o:p></o:p></span></p></div></div><p class=MsoNormal align=left style='text-align:left'><o:p> </o:p></p><p class=MsoNormal>Hi<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>I¡¯m trying to model baseline system 7 HVAC system using ¡®Variable Air Volume¡¯ system with zone HW reheat. When I leave design supply flow blank to let equest auto size, I have 60343 cfm supply flow and 320 unmet heat hour in system summary table. But when I input 60343 cfm in system design flow box and recalculate, then I have 105 unmet hours, and nothing else changed in system summary table. Is that a bug of software or there are some reason I don¡¯t know.<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Yu Liu<o:p></o:p></p><p class=MsoNormal>+8615010414883<o:p></o:p></p><p class=MsoNormal>elaneinside@hotmail.com<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p></div></body></html>