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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='color:#1F497D'>This is a good question and isn’t specifically addressed in Appendix G 2007. It does specify to match the proposed design’s fan arrangement so this can be used as a starting point. On a recent job we did with return fans, the overall fan power was split 70/30 between supply and return. Another job that used power exhaust fans split out to 80/20. As Michael mentioned, Appendix G 2010 says that they should be proportioned out the same as the proposed design although that information often needs to be extracted from the design team.<o:p></o:p></span></p><p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p><div><p class=MsoNormal><b><span style='font-size:7.5pt;font-family:"Arial","sans-serif";color:#DB824A'>Andrew Craig </span></b><b><span style='font-size:6.0pt;font-family:"Arial","sans-serif";color:#DB824A'>PE, LEED AP<br></span></b><span style='font-size:7.5pt;font-family:"Arial","sans-serif";color:#4D4D4D'>Project Mechanical Engineer<br></span><span style='font-size:2.0pt;font-family:"Arial","sans-serif";color:#4D4D4D'><br></span><b><span style='font-size:7.5pt;font-family:"Arial","sans-serif";color:#DB824A'>INTERFACE ENGINEERING<br>email </span></b><span style='font-size:7.5pt;font-family:"Arial","sans-serif";color:#4D4D4D'><a href="mailto:andrewc@interfaceeng.com"><span style='color:#4D4D4D;text-decoration:none'>andrewc@interfaceeng.com</span></a><br></span><b><span style='font-size:7.5pt;font-family:"Arial","sans-serif";color:#DB824A'>direct </span></b><span style='font-size:7.5pt;font-family:"Arial","sans-serif";color:#4D4D4D'>503.382.2696<br></span><span style='font-size:2.0pt;font-family:"Arial","sans-serif";color:#4D4D4D'><br></span><b><span style='font-size:7.5pt;font-family:"Arial","sans-serif";color:#DB824A'><a href="http://www.interfaceeng.com/"><span style='color:#DB824A'>www.interfaceeng.com</span></a><br></span></b><span style='font-size:2.0pt;font-family:"Arial","sans-serif";color:#4D4D4D'><br><br><o:p></o:p></span></p></div><p class=MsoNormal><span style='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><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"'> bldg-sim-bounces@lists.onebuilding.org [mailto:bldg-sim-bounces@lists.onebuilding.org] <b>On Behalf Of </b>Hopf, Johannes<br><b>Sent:</b> Tuesday, March 08, 2011 10:36 AM<br><b>To:</b> bldg-sim@lists.onebuilding.org<br><b>Subject:</b> Re: [Bldg-sim] Appendix G - Fan power<o:p></o:p></span></p></div></div><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:black'>From time to time we´re asked in LEED-Clarifications to break up the total fan-power into relief, exhaust, supply etc. Can somebody tell us what to do?<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:black'>The calculation in the proposed is totally different and for the baseline we only use the 90.1 equations.<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:black'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:black'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:black'>Johannes</span><span lang=DE style='font-size:8.0pt;font-family:"Arial","sans-serif";color:#29457B'><o:p></o:p></span></p><p class=MsoNormal style='margin-bottom:12.0pt'><span lang=DE><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 style='margin-left:35.4pt'><b><span lang=DE style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>Von:</span></b><span lang=DE style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'> bldg-sim-bounces@lists.onebuilding.org [mailto:bldg-sim-bounces@lists.onebuilding.org] <b>Im Auftrag von </b>Sami, Vikram<br><b>Gesendet:</b> Dienstag, 8. März 2011 17:11<br><b>An:</b> bldg-sim@lists.onebuilding.org<br><b>Betreff:</b> [Bldg-sim] Appendix G - Fan power<o:p></o:p></span></p></div></div><p class=MsoNormal style='margin-left:35.4pt'><span lang=DE><o:p> </o:p></span></p><p class=MsoNormal style='margin-left:35.4pt'>Does the dot in the equation indicate multiplication? So should the equation read CFM<sub>S</sub> X 0.0013 + A?<o:p></o:p></p><p class=MsoNormal style='margin-left:35.4pt'><o:p> </o:p></p><p class=MsoNormal style='margin-left:35.4pt'>The reason I am confused is that they use X in other places. <o:p></o:p></p><p class=MsoNormal style='margin-left:35.4pt'><img border=0 width=1178 height=226 id="Picture_x0020_1" src="cid:image001.png@01CBDD7D.A92EFAF0" alt="cid:image001.png@01CBDD80.E98B1630"><o:p></o:p></p><p class=MsoNormal style='margin-left:35.4pt'><o:p> </o:p></p><p class=MsoNormal style='margin-left:35.4pt'>Thanks in advance<o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:35.4pt'><b><span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:#DCAA2C'>We've moved! 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