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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'>Ashraf,<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'>ASHRAE 62.1 is concerned with people, who need ventilation (supply / intake). For typical buildings, you may not need separate exhaust fans, because that amount can probably exfiltrate through cracks. Supply and exhaust fans can be used in tandem if the building is fairly tight (no leaks).<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'>Your MEP team’s 5-8 air changes per hour is for cooling, not ventilation. Any building with which has that much infiltration is closer to a tent than a building! (It’s not closed up.)<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><p class=MsoNormal align=center style='text-align:center'><b><span style='font-size:13.5pt;color:#1F497D'>The Building Performance Team<br></span></b><b><span style='color:#1F497D'>James V. Dirkes II, P.E., LEED AP<br></span></b><span style='color:#1F497D'>1631 Acacia Drive NW<br>Grand Rapids, MI 49504<br>616 450 8653<o:p></o:p></span></p></div><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";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 style='margin-left:.5in'><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>Ashraf Khan<br><b>Sent:</b> Tuesday, January 25, 2011 11:55 PM<br><b>To:</b> bldg-sim@lists.onebuilding.org<br><b>Subject:</b> [Bldg-sim] Warehouse ventilations to comply with ASHRAE 62.1<o:p></o:p></span></p></div></div><p class=MsoNormal style='margin-left:.5in'><o:p> </o:p></p><p class=MsoNormal style='margin-left:.5in'><span style='font-size:11.0pt;font-family:"Arial","sans-serif";color:navy'>We received a LEED review comment regarding Warehouse ventilation to comply with ASHRAE 62.1-2004.<o:p></o:p></span></p><p class=MsoNormal style='margin-left:.5in'><span style='font-size:11.0pt;font-family:"Arial","sans-serif";color:navy'><o:p> </o:p></span></p><p class=MsoNormal style='margin-left:.5in'><span style='font-size:11.0pt;font-family:"Arial","sans-serif";color:navy'>Generally depending on the warehouse storage, MEP team recommends 5-8 Air Changes per Hour by thumb rule for exhaust and air intake is assumed by infiltration by windows, open doors etc.. But this number I haven’t find in ASHRAE, please give me reference.<o:p></o:p></span></p><p class=MsoNormal style='margin-left:.5in'><span style='font-size:11.0pt;font-family:"Arial","sans-serif";color:navy'><o:p> </o:p></span></p><p class=MsoNormal style='margin-left:.5in'><span style='font-size:11.0pt;font-family:"Arial","sans-serif";color:navy'>ASHRAE 62.1-2004, Table 6-1 for warehouse category says to have 0.06 cfm/ft<sup>2</sup>, is this number defines to intake or Exhaust? If it is exhaust, it is too small as volume of warehouse will be high.<o:p></o:p></span></p><p class=MsoNormal style='margin-left:.5in'><span style='font-size:11.0pt;font-family:"Arial","sans-serif";color:navy'><o:p> </o:p></span></p><p class=MsoNormal style='margin-left:.5in'><span style='font-size:11.0pt;font-family:"Arial","sans-serif";color:navy'>Please share your ideas to comply with the requirements.<o:p></o:p></span></p><p class=MsoNormal style='margin-left:.5in'><span style='font-size:11.0pt;font-family:"Arial","sans-serif";color:navy'><o:p> </o:p></span></p><p class=MsoNormal style='margin-left:.5in'><span style='font-size:11.0pt;font-family:"Arial","sans-serif";color:navy'>Thanks & Regards,<o:p></o:p></span></p><p class=MsoNormal style='margin-left:.5in'><span style='font-size:11.0pt;font-family:"Arial","sans-serif";color:navy'>Ashraf<o:p></o:p></span></p></div></body></html>