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</o:shapelayout></xml><![endif]--></head><body lang=EN-US link=blue vlink=purple><div class=WordSection1><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Good morning,<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Option 2 is the appropriate way to represent the oversizing requirements in Section G3.1.2.2. Since the supply airflow must be determined based on a 20 degree F temperature difference between the supply and room design temperature (Section G3.1.2.8) and using the system oversizing factor will violate this requirement unless you also adjust the temperature differential to compensate for the fan oversizing.<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Hope this helps!<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#3D9959'>Cam Fitzgerald<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#3D9959'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#3D9959'>Energy Opportunities/a 7group company<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in 0in 0in'><p class=MsoNormal><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"'> equest-users-bounces@lists.onebuilding.org [mailto:equest-users-bounces@lists.onebuilding.org] <b>On Behalf Of </b>GK Pandian<br><b>Sent:</b> Wednesday, April 03, 2013 7:57 AM<br><b>To:</b> equest-users<br><b>Subject:</b> [Equest-users] System sizing ratio-Table G3.1.2.2<o:p></o:p></span></p></div><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Folks,<o:p></o:p></p><p class=MsoNormal> <o:p></o:p></p><p class=MsoNormal>I 'm trying to increase the equipment capacities in baseline model in order to comply with G3.1.2.2. using below options;<o:p></o:p></p><p class=MsoNormal> <o:p></o:p></p><table class=MsoNormalTable border=0 cellspacing=0 cellpadding=0 width=448 style='width:336.0pt;border-collapse:collapse'><tr style='height:15.0pt'><td width=192 colspan=3 style='width:2.0in;border:solid windowtext 1.0pt;padding:0in 0in 0in 0in;height:15.0pt'><p class=MsoNormal align=center style='text-align:center'><span style='font-family:"Calibri","sans-serif"'>System sizing ratio-Option 1</span><o:p></o:p></p></td><td width=64 style='width:48.0pt;padding:0in 0in 0in 0in;height:15.0pt'><p class=MsoNormal align=center style='text-align:center'><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'> </span><o:p></o:p></p></td><td width=192 colspan=3 style='width:2.0in;border:solid windowtext 1.0pt;padding:0in 0in 0in 0in;height:15.0pt'><p class=MsoNormal align=center style='text-align:center'><span style='font-family:"Calibri","sans-serif"'>System sizing ratio-Option 2</span><o:p></o:p></p></td></tr><tr style='height:15.0pt'><td style='border:solid windowtext 1.0pt;border-top:none;padding:0in 0in 0in 0in;height:15.0pt'><p class=MsoNormal align=center style='text-align:center'><span style='font-family:"Calibri","sans-serif"'>Basic</span><o:p></o:p></p></td><td style='border-top:none;border-left:none;border-bottom:solid windowtext 1.0pt;border-right:solid windowtext 1.0pt;padding:0in 0in 0in 0in;height:15.0pt'><p class=MsoNormal align=center style='text-align:center'><span style='font-family:"Calibri","sans-serif"'>Cooling</span><o:p></o:p></p></td><td style='border-top:none;border-left:none;border-bottom:solid windowtext 1.0pt;border-right:solid windowtext 1.0pt;padding:0in 0in 0in 0in;height:15.0pt'><p class=MsoNormal align=center style='text-align:center'><span style='font-family:"Calibri","sans-serif"'>Heating</span><o:p></o:p></p></td><td style='padding:0in 0in 0in 0in;height:15.0pt'><p class=MsoNormal align=center style='text-align:center'><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'> </span><o:p></o:p></p></td><td style='border:solid windowtext 1.0pt;border-top:none;padding:0in 0in 0in 0in;height:15.0pt'><p class=MsoNormal align=center style='text-align:center'><span style='font-family:"Calibri","sans-serif"'>Basic</span><o:p></o:p></p></td><td style='border-top:none;border-left:none;border-bottom:solid windowtext 1.0pt;border-right:solid windowtext 1.0pt;padding:0in 0in 0in 0in;height:15.0pt'><p class=MsoNormal align=center style='text-align:center'><span style='font-family:"Calibri","sans-serif"'>Cooling</span><o:p></o:p></p></td><td style='border-top:none;border-left:none;border-bottom:solid windowtext 1.0pt;border-right:solid windowtext 1.0pt;padding:0in 0in 0in 0in;height:15.0pt'><p class=MsoNormal align=center style='text-align:center'><span style='font-family:"Calibri","sans-serif"'>Heating</span><o:p></o:p></p></td></tr><tr style='height:15.0pt'><td style='border:solid windowtext 1.0pt;border-top:none;padding:0in 0in 0in 0in;height:15.0pt'><p class=MsoNormal align=center style='text-align:center'><span style='font-family:"Calibri","sans-serif"'>1.15</span><o:p></o:p></p></td><td style='border-top:none;border-left:none;border-bottom:solid windowtext 1.0pt;border-right:solid windowtext 1.0pt;padding:0in 0in 0in 0in;height:15.0pt'><p class=MsoNormal align=center style='text-align:center'><span style='font-family:"Calibri","sans-serif"'>1</span><o:p></o:p></p></td><td style='border-top:none;border-left:none;border-bottom:solid windowtext 1.0pt;border-right:solid windowtext 1.0pt;padding:0in 0in 0in 0in;height:15.0pt'><p class=MsoNormal align=center style='text-align:center'><span style='font-family:"Calibri","sans-serif"'>1.08</span><o:p></o:p></p></td><td style='padding:0in 0in 0in 0in;height:15.0pt'><p class=MsoNormal align=center style='text-align:center'><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'> </span><o:p></o:p></p></td><td style='border:solid windowtext 1.0pt;border-top:none;padding:0in 0in 0in 0in;height:15.0pt'><p class=MsoNormal align=center style='text-align:center'><span style='font-family:"Calibri","sans-serif"'>1</span><o:p></o:p></p></td><td style='border-top:none;border-left:none;border-bottom:solid windowtext 1.0pt;border-right:solid windowtext 1.0pt;padding:0in 0in 0in 0in;height:15.0pt'><p class=MsoNormal align=center style='text-align:center'><span style='font-family:"Calibri","sans-serif"'>1.15</span><o:p></o:p></p></td><td style='border-top:none;border-left:none;border-bottom:solid windowtext 1.0pt;border-right:solid windowtext 1.0pt;padding:0in 0in 0in 0in;height:15.0pt'><p class=MsoNormal align=center style='text-align:center'><span style='font-family:"Calibri","sans-serif"'>1.25</span><o:p></o:p></p></td></tr></table><p class=MsoNormal> <o:p></o:p></p><p class=MsoNormal>Both options are looks similar, but it's giving two different results though! <o:p></o:p></p><p class=MsoNormal> <o:p></o:p></p><p class=MsoNormal>If I change the basic system sizing ratio to 1, I can see increase in equipment capacity but not in airflow. So, I concluded to proceed with "option 1", since I can see increase in both capacities and airflow. <o:p></o:p></p><p class=MsoNormal> <o:p></o:p></p><p class=MsoNormal>Am I doing correct here? Appreciate your suggestions.<o:p></o:p></p><p class=MsoNormal> <o:p></o:p></p><p class=MsoNormal>Thanks<o:p></o:p></p><p class=MsoNormal>Gopi<o:p></o:p></p><p> <o:p></o:p></p></div></body></html>