<html><body><div style="color:#000; background-color:#fff; font-family:HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif;font-size:12pt"><div style="RIGHT: auto"><SPAN style="RIGHT: auto">Crina:</SPAN></div>
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<div style="BACKGROUND-COLOR: transparent; FONT-STYLE: normal; FONT-FAMILY: HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif; COLOR: rgb(0,0,0); FONT-SIZE: 16px; RIGHT: auto"><SPAN style="RIGHT: auto">If your system is 100% OSA (whicI i believe it is), you can use the MIN-FLOW-SCH to set an hourly air flow(and thus outside airflow) for your space.</SPAN></div>
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<div style="RIGHT: auto"><SPAN style="RIGHT: auto">John R. Aulbach, PE</SPAN></div>
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<DIV style="BORDER-BOTTOM: #ccc 1px solid; BORDER-LEFT: #ccc 1px solid; PADDING-BOTTOM: 0px; LINE-HEIGHT: 0; MARGIN: 5px 0px; PADDING-LEFT: 0px; PADDING-RIGHT: 0px; HEIGHT: 0px; FONT-SIZE: 0px; BORDER-TOP: #ccc 1px solid; BORDER-RIGHT: #ccc 1px solid; PADDING-TOP: 0px" class=hr contentEditable=false readonly="true"></DIV><FONT size=2 face=Arial><B><SPAN style="FONT-WEIGHT: bold">From:</SPAN></B> "Bosch, Crina" <CBosch@karpinskieng.com><BR><B><SPAN style="FONT-WEIGHT: bold">To:</SPAN></B> "equest-users@lists.onebuilding.org" <equest-users@lists.onebuilding.org> <BR><B><SPAN style="FONT-WEIGHT: bold">Sent:</SPAN></B> Monday, April 14, 2014 10:19 AM<BR><B><SPAN style="FONT-WEIGHT: bold">Subject:</SPAN></B> [Equest-users] Night time setback<BR></FONT></DIV>
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<div class=yiv4459659297MsoNormal>I am running a model for an operating room. My goal is to show the system savings for a night set back. I am using a VAV system that is currently running 24/7 at 100% flow. My goal is to show the benefit of running this system at different maximum airflow levels while maintaining constant flow during unoccupied times.</div>
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<div class=yiv4459659297MsoNormal>If my OR schedule is 5am to 5pm, I would like the fan to run at 20 ACH during occupied time, 10 ACH during the first 3 hours of unoccupied time, and 6 ACH for the remaining unoccupied time.</div>
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<div class=yiv4459659297MsoNormal>Can I achieve this by adjusting fan schedules, or fan parameters for different occupancy settings? Any advice that may point me in the right direction would be helpful.</div>
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<div class=yiv4459659297MsoNormal>If three different levels of fan speed are too much to ask, I would be happy with being able to run at 20 ACH during occ. And 6 ACH during unocc.</div>
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<div class=yiv4459659297MsoNormal><SPAN style="COLOR: black; FONT-SIZE: 10pt">Crina Bosch<BR>Designer, Sustainability</SPAN><SPAN style="COLOR: black; FONT-SIZE: 12pt"></SPAN></div>
<div class=yiv4459659297MsoNormal><SPAN style="COLOR: red; FONT-SIZE: 13.5pt">karpinski<BR></SPAN><SPAN style="COLOR: black; FONT-SIZE: 7.5pt">ENGINEERING</SPAN><SPAN style="COLOR: black; FONT-SIZE: 10pt"><BR>3135 Euclid Avenue<BR>Cleveland, OH 44115</SPAN><SPAN style="COLOR: #1f497d; FONT-SIZE: 10pt"><BR></SPAN><SPAN style="COLOR: red; FONT-SIZE: 10pt">P</SPAN><SPAN style="COLOR: #1f497d; FONT-SIZE: 10pt"> </SPAN><SPAN style="COLOR: black; FONT-SIZE: 10pt">216.391.3700 ext 3087</SPAN><SPAN style="COLOR: #1f497d; FONT-SIZE: 10pt"><BR></SPAN><SPAN style="COLOR: red; FONT-SIZE: 10pt">F </SPAN><SPAN style="COLOR: #1f497d; FONT-SIZE: 10pt"> </SPAN><SPAN style="COLOR: black; FONT-SIZE: 10pt">216.391.0108</SPAN><SPAN style="COLOR: #1f497d; FONT-SIZE: 10pt"><BR></SPAN><SPAN style="COLOR: red; FONT-SIZE: 10pt">E</SPAN><SPAN style="COLOR: navy; FONT-SIZE: 10pt"> </SPAN><SPAN style="COLOR: red; FONT-SIZE: 10pt"><A
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