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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'>Here is a good paper on commercial building air-tightness.<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><b><span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:black'>Kelsey Van Tassel</span><span style='color:#000066'><o:p></o:p></span></b></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:black'>Mechanical Engineer | <a href="mailto:kvantassel@sustaineng.com">kvantassel@sustaineng.com</a></span><span style='color:#000066'><o:p></o:p></span></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:black'>608.836.4488 ext. 20 | Fax: 608.836.4477</span><span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:black'><o:p></o:p></span></p><p class=MsoNormal><span style='color:#000066'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:black'>Sustainable Engineering Group</span><span style='color:#000066'><o:p></o:p></span></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:black'>901 Deming Way, Suite 201</span><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'>Madison, WI 53717<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:black'><a href="http://www.sustaineng.com/">www.sustaineng.com</a><o:p></o:p></span></p><p class=MsoNormal><span style='color:black'> </span><span style='color:#000066'><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>Rob Hudson<br><b>Sent:</b> Wednesday, May 04, 2011 1:44 PM<br><b>To:</b> Shalini Modi<br><b>Cc:</b> eQUEST Mail list<br><b>Subject:</b> Re: [Equest-users] infiltration levels<o:p></o:p></span></p></div><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>I would not input the ACH at 50 Pa into eQuest, as your infiltration will be incredibly huge (made mistake myself in the past). The wizard has a good approximation for "average" buildings programed into it, and i recall it was around 0.038 cfm/sqft of exterior wall area. We like to use exterior wall area rather than total ACH rate. This usually works out to around 0.005 to 0.04 cfm/sqft of floor area, depending on the space and its exposure.<o:p></o:p></p><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>Hope this helps a little. there are lots of documents online that can help further explain "normal" values to use in the model, which can then be translated into eQuest inputs later.<o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal style='margin-bottom:12.0pt'>Rob<o:p></o:p></p><div><p class=MsoNormal>On Wed, May 4, 2011 at 1:27 PM, Shalini Modi <<a href="mailto:shalinimodi@msn.com">shalinimodi@msn.com</a>> wrote:<o:p></o:p></p><div><p class=MsoNormal>Dear all,<br><br>I would really appreciate some insight on infiltration with respect to eQUEST.<br><br>The air change rate of the building at a pressure difference of 50 Pa indicates the level of air tightness. eQUEST allows entering the number of infiltration caused air changes per hour at a reference speed of 4.47 m/s. In that case, do we just enter the ach at 50 Pa in eQUEST, then how does the wind factor effect? Am kind of confused.<br><br>Also, I would highly appreciate if anyone could share what are the ballpark infiltration levels in commercial (small) buildings in US and Canada.<br><br>Thanks,<br><br>Shalini<o:p></o:p></p></div><p class=MsoNormal style='margin-bottom:12.0pt'><br>_______________________________________________<br>Equest-users mailing list<br><a href="http://lists.onebuilding.org/listinfo.cgi/equest-users-onebuilding.org" target="_blank">http://lists.onebuilding.org/listinfo.cgi/equest-users-onebuilding.org</a><br>To unsubscribe from this mailing list send a blank message to <a href="mailto:EQUEST-USERS-UNSUBSCRIBE@ONEBUILDING.ORG">EQUEST-USERS-UNSUBSCRIBE@ONEBUILDING.ORG</a><o:p></o:p></p></div><p class=MsoNormal><br><br clear=all><br>-- <br>Rob Hudson<o:p></o:p></p></div></div></body></html>