<html><head><style type="text/css"><!-- DIV {margin:0px;} --></style></head><body><div style="font-family:times new roman, new york, times, serif;font-size:12pt"><DIV>Scott:</DIV>
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<DIV>If you are going from a constant volume system with reheat to a VAV system, you will eliminate a ton of excess heating. The % may be large as you may not have had much heating to begin with.<BR></DIV>
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<B><SPAN style="FONT-WEIGHT: bold">From:</SPAN></B> Jeremy McClanathan <jmcclanathan@CDiengineers.com><BR><B><SPAN style="FONT-WEIGHT: bold">To:</SPAN></B> "Tomlinson, Scott" <stomlinson@smma.com>; "equest-users@lists.onebuilding.org" <equest-users@lists.onebuilding.org><BR><B><SPAN style="FONT-WEIGHT: bold">Sent:</SPAN></B> Tue, March 2, 2010 9:01:30 AM<BR><B><SPAN style="FONT-WEIGHT: bold">Subject:</SPAN></B> Re: [Equest-users] [eQuest users] packaged variable volume system<BR></FONT><BR>
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<P class=MsoNormal><SPAN style="COLOR: #1f497d">The first thing I would check is simultaneous heating and cooling. If it is a problem, check the reset temps and controls of the packaged system. The packaged unit may be cooling the air, then tempering it at the zone level.</SPAN></P>
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<P class=MsoNormal><B><SPAN style="FONT-FAMILY: 'sans-serif'; COLOR: olive; FONT-SIZE: 10pt">Jeremy McClanathan</SPAN></B><SPAN style="FONT-FAMILY: 'sans-serif'; COLOR: gray; FONT-SIZE: 7.5pt">, LEED<SUP>®</SUP> AP</SPAN><SPAN style="FONT-FAMILY: 'sans-serif'; COLOR: #1f497d; FONT-SIZE: 12pt"></SPAN></P>
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<P class=MsoNormal><SPAN style="FONT-FAMILY: 'sans-serif'; COLOR: gray; FONT-SIZE: 7.5pt">4200 194th St SW, Ste 200, Lynnwood, WA 98036</SPAN><SPAN style="FONT-FAMILY: 'sans-serif'; COLOR: #1f497d"></SPAN></P>
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<P class=MsoNormal><B><SPAN style="FONT-FAMILY: 'sans-serif'; FONT-SIZE: 10pt">From:</SPAN></B><SPAN style="FONT-FAMILY: 'sans-serif'; FONT-SIZE: 10pt"> Tomlinson, Scott [mailto:stomlinson@smma.com] <BR><B>Sent:</B> Tuesday, March 02, 2010 8:42 AM<BR><B>To:</B> equest-users@lists.onebuilding.org<BR><B>Subject:</B> [Equest-users] [eQuest users] packaged variable volume system</SPAN></P></DIV></DIV>
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<P class=MsoNormal>I have a question regarding HVAC system types in eQuest. My baseline building is modeled as a <U>packaged variable volume system</U> (It is a System 5) while my design building is mostly modeled as a bunch of <U>packaged single zone systems</U>. For some reason I am getting a 70% reduction in gas consumption, even thought my efficiencies are pretty similar. This reduction seems unreasonable. Is there something about the <U>packaged variable volume system</U> in eQuest that I don’t know about? What type of system do people usually use for a system 5?</P>
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<P class=MsoListParagraph><SPAN>-<SPAN style="FONT: 7pt 'Times New Roman'"> </SPAN></SPAN>Thanks,</P>
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<P class=MsoNormal><B><SPAN style="FONT-FAMILY: 'sans-serif'; COLOR: black; FONT-SIZE: 10pt">Scott Tomlinson, PE, LEED-AP</SPAN></B><SPAN style="FONT-FAMILY: 'sans-serif'; COLOR: black; FONT-SIZE: 10pt"></SPAN></P></TD></TR>
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<P class=MsoNormal><SPAN style="FONT-FAMILY: 'sans-serif'; COLOR: black; FONT-SIZE: 10pt">t: 617.520.9438</SPAN></P></TD>
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