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<DIV><FONT face=Arial size=2><SPAN class=891202819-15082007>Hello
all,</SPAN></FONT></DIV>
<DIV><FONT face=Arial size=2><SPAN
class=891202819-15082007></SPAN></FONT> </DIV>
<DIV><FONT face=Arial size=2><SPAN class=891202819-15082007>I am having
difficulties modeling the temperature control side of an underfloor air
system. Air is to enter the zones at 63 degF. Supply air is
passed through a cooling coil set to provide 55 degF air (for humidity
control). A portion of the air bypasses the cooling coil and mixes with
the 55 degF air in order to achieve the 63 degF SAT. Is it possible to
control the coil leaving temperature while also maintaining the zone
entering SAT?</SPAN></FONT></DIV>
<DIV><FONT face=Arial size=2><SPAN
class=891202819-15082007></SPAN></FONT> </DIV>
<DIV><FONT face=Arial size=2><SPAN class=891202819-15082007>I do know that the
'Zone Entering Min Supply Temp' specified in eQuest is used to calculated the
design supply air flow rate and that the 'Coil Design Bypass Factor' is a max
setpoint for the system. Hourly Reports of zone temperature, cooling
coil leaving temperature, and return air temperature suggest that the 63degF
supply air is not achieved. Does anyone have experience with
this?</SPAN></FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV align=left><FONT face=Arial size=2>
<DIV align=left><EM><FONT face="Bookman Old Style" size=3>Robert
Garcia</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)
282-2182</SPAN></FONT></FONT></DIV>
<DIV align=left><FONT size=2><FONT size=1><SPAN
style="FONT-SIZE: 9pt; FONT-FAMILY: 'Century Gothic'"></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></FONT></DIV>
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