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<DIV><FONT face=Univers size=2><SPAN class=237064121-06102009>Fellow
eQuesters,</SPAN></FONT></DIV>
<DIV><FONT face=Univers size=2><SPAN
class=237064121-06102009></SPAN></FONT> </DIV>
<DIV><FONT face=Univers size=2><SPAN class=237064121-06102009>I'm having trouble
de-bugging unmet heating hours for two systems in the attached
building stemming from the following warning message:</SPAN></FONT></DIV>
<DIV><FONT face=Univers size=2><SPAN
class=237064121-06102009></SPAN></FONT> </DIV>
<DIV><FONT face=Univers size=2><SPAN class=237064121-06102009>
<DIV><FONT size=2><FONT face=Univers>PREHEAT/HEATING-CAPACITY in SYSTEM
AHU-16</FONT> </FONT></DIV>
<DIV><FONT face=Univers size=2>is too low to provide the requested supply
temperature for</FONT></DIV>
<DIV><FONT face=Univers size=2>the calculated mixed air temperature using total
ZONE loads</FONT></DIV>
<DIV><FONT face=Univers size=2>(on LS-A/B) and SYSTEM design parameters, plus
outside air</FONT></DIV>
<DIV><FONT face=Univers size=2>conditions (on LS-C), and specified capacities
& air flows.</FONT></DIV>
<DIV><FONT face=Univers size=2>Requested temperature is 95.00 calculated is
64.00</FONT></DIV>
<DIV><FONT face=Univers size=2>Check HEATING-CAPACITY, HEAT-SET-T, PRE-HEAT-T,
MAX-SUPPLY-T,</FONT></DIV>
<DIV><FONT face=Univers size=2>DESIGN-HEAT-T, and ZONE loads for
consistency.</FONT></DIV></SPAN></FONT></DIV>
<DIV><FONT face=Univers size=2><SPAN
class=237064121-06102009></SPAN></FONT> </DIV>
<DIV><FONT face=Univers size=2><SPAN class=237064121-06102009>I'm trying to
model an air-side system for the below-grade parking garage of the building that
has a gas-fired furnace, no cooling and provides ventilation (with the ability
to provide 100% OA when appropriate). The system type descriptions in the
help file led me to select a HVSYS (heating and ventilation) system. Each
system serves two zones and </SPAN></FONT><FONT face=Univers size=2><SPAN
class=237064121-06102009>I've specified a zone entering max of 95F
(MAX-SUPPLY-T) and set the zone heating design temperature to 64F
(DESIGN-HEAT-T). I've also let eQuest auto-size the furnace capacity using
a heat sizing ratio of 1.2. </SPAN></FONT></DIV>
<DIV><FONT face=Univers size=2><SPAN
class=237064121-06102009></SPAN></FONT> </DIV>
<DIV><FONT face=Univers size=2><SPAN class=237064121-06102009>I'm getting
the above error, but I don't understand what is causing it.
</SPAN></FONT><FONT face=Univers size=2><SPAN class=237064121-06102009>I think
it may have something to do with my heating schedules or the outdoor air flows
although I cannot trace the problem.</SPAN></FONT></DIV>
<DIV><FONT face=Univers size=2><SPAN
class=237064121-06102009></SPAN></FONT> </DIV>
<DIV><FONT face=Univers size=2><SPAN class=237064121-06102009>Any help would be
much appreciated.</SPAN></FONT></DIV>
<DIV><FONT face=Univers size=2><SPAN
class=237064121-06102009></SPAN></FONT> </DIV>
<DIV><FONT face=Univers size=2><SPAN
class=237064121-06102009>Thanks,</SPAN></FONT></DIV>
<DIV><FONT face=Univers size=2><SPAN
class=237064121-06102009></SPAN></FONT> </DIV>
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class=237064121-06102009></SPAN></FONT><FONT face=Univers size=2><SPAN
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<DIV class=Section1>
<P class=MsoNormal dir=ltr align=left><B><SPAN
style="FONT-SIZE: 9pt; FONT-FAMILY: Arial">Luka Matutinovic, </SPAN></B><SPAN
class=SpellE><SPAN
style="FONT-SIZE: 9pt; FONT-FAMILY: Arial">B.A.Sc</SPAN></SPAN><SPAN
style="FONT-SIZE: 9pt; FONT-FAMILY: Arial">., LEED<SUP>®</SUP> AP</SPAN></P>
<P class=MsoNormal><EM><SPAN style="FONT-SIZE: 7.5pt; FONT-FAMILY: Arial">Green
Building Consultant</SPAN></EM><I><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Arial"><BR></SPAN></I><EM><SPAN
style="FONT-SIZE: 6pt; FONT-FAMILY: Arial"> </SPAN></EM><I><SPAN
style="FONT-SIZE: 6pt; FONT-FAMILY: Arial"><BR></SPAN></I><SPAN
style="FONT-SIZE: 7.5pt; FONT-FAMILY: Arial">T. 416.644.0649</SPAN></P>
<P class=MsoNormal><SPAN style="FONT-SIZE: 7.5pt; FONT-FAMILY: Arial">F.
416.487.9766 <BR>Toll Free 1.888.425.7255<BR>www.halsall.com
<BR></SPAN><SPAN style="FONT-SIZE: 6pt"><BR></SPAN><B><SPAN
style="FONT-SIZE: 9pt; FONT-FAMILY: Arial">HALSALL ASSOCIATES LTD.
<BR></SPAN></B><?xml:namespace prefix = st1 ns =
"urn:schemas-microsoft-com:office:smarttags" /><st1:City w:st="on"><SPAN
style="FONT-SIZE: 7pt; FONT-FAMILY: Arial">Toronto</SPAN></st1:City><SPAN
style="FONT-SIZE: 7pt; FONT-FAMILY: Arial"> <st1:City w:st="on">Richmond
Hill</st1:City> <st1:City w:st="on">Ottawa</st1:City> <st1:City
w:st="on">Sudbury</st1:City> <BR><st1:City w:st="on">Burlington</st1:City>
<st1:City w:st="on">Calgary</st1:City> <st1:City
w:st="on">Vancouver</st1:City> <st1:City w:st="on">Dubai</st1:City>
<BR></SPAN><SPAN><BR><SPAN style="FONT-SIZE: 10px"><STRONG><FONT
face=Verdana>‘50 Best Workplaces in Canada’ <BR></FONT></STRONG><I><FONT
face=Verdana>2009 Globe and Mail</FONT><BR></I></SPAN></SPAN><SPAN
style="FONT-SIZE: 18pt; COLOR: green; FONT-FAMILY: Webdings; mso-bidi-font-family: Arial">P</SPAN><STRONG><SPAN
style="COLOR: black; mso-ansi-language: EN-CA"> </SPAN></STRONG><SPAN
class=GramE><STRONG><SPAN
style="FONT-SIZE: 7.5pt; COLOR: green; FONT-FAMILY: Verdana; mso-bidi-font-family: Arial">Please</SPAN></STRONG></SPAN><STRONG><SPAN
style="FONT-SIZE: 7.5pt; COLOR: green; FONT-FAMILY: Verdana; mso-bidi-font-family: Arial">
consider the environment before printing this e-mail</SPAN></STRONG><SPAN
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