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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>
<DIV align=left><FONT size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Century Gothic'">AKF Engineers,
LLP<BR></SPAN><?xml:namespace prefix = st1 ns =
"urn:schemas-microsoft-com:office:smarttags" /><st1:Street
w:st="on"><st1:address w:st="on"><FONT size=1><SPAN
style="FONT-SIZE: 9pt; FONT-FAMILY: 'Century Gothic'">1500 Walnut Street, Suite
1400<BR></SPAN></FONT></st1:address></st1:Street><st1:place w:st="on"><st1:City
w:st="on"><FONT size=1><SPAN
style="FONT-SIZE: 9pt; FONT-FAMILY: 'Century Gothic'">Philadelphia</SPAN></FONT></st1:City><FONT
size=1><SPAN style="FONT-SIZE: 9pt; FONT-FAMILY: 'Century Gothic'">, <st1:State
w:st="on">PA</st1:State> <st1:PostalCode
w:st="on">19102</st1:PostalCode></SPAN></FONT></st1:place><FONT size=1><SPAN
style="FONT-SIZE: 9pt; FONT-FAMILY: 'Century Gothic'"> <BR></SPAN></FONT><FONT
size=1><SPAN
style="FONT-SIZE: 9pt; FONT-FAMILY: 'Century Gothic'">Phone: (215)
282-2169<BR></SPAN></FONT><FONT size=1><SPAN
style="FONT-SIZE: 9pt; FONT-FAMILY: 'Century Gothic'">Fax:
(215) 735-6706<BR></SPAN></FONT><FONT size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Century Gothic'"><A
href="http://www.akf-engineers.com/"><FONT
color=#000000>www.akf</FONT></SPAN></FONT><FONT size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Century Gothic'"><FONT
color=#000000>-engineers.com</FONT></A></SPAN></FONT></FONT></DIV></BODY></HTML>