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<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>Hello,<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>eQuest allows users to specify loop and coil design temperature
differentials, and yet it appears that these setpoints are not maintained
within the program. For example, I can specify a hot water loop temperature
differential of 25°F and specify that all the coils are selected at 25°F, yet
the hourly temperature differentials are typically 40°F even when the supply hot
water temperature is held constant at the design temperature throughout the
year. With 2-way control valves it seems as though the temperature
differential across the coils should remain within several degrees of 25°F. Do
you agree?<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>The impact of the high coil/loop differential temperatures
is the underestimate of pump energy.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>I posted a question similar to this in October and did not
get a response, so your input is greatly appreciated!<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>Thanks for your time,<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>Eric<o:p></o:p></span></font></p>
<p class=MsoNormal><u><font size=2 face="Times New Roman"><span
style='font-size:10.0pt'>
</span></font></u><o:p></o:p></p>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'> <o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face="Times New Roman"><span style='font-size:
10.0pt'>Eric Studer, PE, LEED AP<br>
DMI<br>
<st1:Street w:st="on"><st1:address w:st="on">35 Walnut Street</st1:address></st1:Street><br>
<st1:place w:st="on"><st1:City w:st="on">Wellesley</st1:City>, <st1:State
w:st="on">MA</st1:State> <st1:PostalCode w:st="on">02481</st1:PostalCode></st1:place><br>
Ph: (781) 431-1100 ext 12<br>
Fax: (781) 431-1109<br>
e-mail: estuder@dmiinc.com</span></font><o:p></o:p></p>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><o:p> </o:p></span></font></p>
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