<html><div style='background-color:'><P>I have used the ASHRAE Fundamentals Chapter 27 to estimate infiltration and also to estimate energy savings for a similar situation.</P>
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<P>Vaibhav Potnis <BR>Green Building Services, Inc.</P>
<P>Portland OR<FONT style="FONT-SIZE: 11px; FONT-FAMILY: tahoma,sans-serif"></P>
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<P>From: <I>"Dahlstrom, Aaron" <ADahlstrom@AKF-ENG.com></I><BR>Reply-To: <I>ADahlstrom@AKF-ENG.com</I><BR>To: <I><bldg-sim@gard.com></I><BR>Subject: <I>[bldg-sim] how much cold air infiltration can I really expect?</I><BR>Date: <I>Wed, 31 Jan 2007 21:29:12 -0500</I><BR><BR></P>
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<DIV><SPAN class=426371202-01022007><FONT face=Arial size=2>I have noticed that infiltration makes up most of the winter heating load for several high-bay single-story commercial buildings I'm modeling. (big-box retailer, light manufacturing facility)</FONT></SPAN></DIV>
<DIV><SPAN class=426371202-01022007><FONT face=Arial size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=426371202-01022007><FONT face=Arial size=2>I've used a variety of methods - ACH estimates, CFM / so of facade (per ASHRAE F27.10), and Area(crack) x Velocity(winter wind) - to estimate infiltration.</FONT></SPAN></DIV>
<DIV><SPAN class=426371202-01022007><FONT face=Arial size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=426371202-01022007><FONT face=Arial size=2>Have other people stuck with these methods? Or does anyone </FONT></SPAN><SPAN class=426371202-01022007><FONT face=Arial size=2>know of better ways to estimate infiltration?</FONT></SPAN></DIV>
<DIV><SPAN class=426371202-01022007><FONT face=Arial size=2></FONT></SPAN> </DIV>
<DIV><EM><FONT face="Bookman Old Style">Aaron Dahlstrom</FONT></EM></DIV>
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