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<p class=MsoNormal>Hello all,<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>I have a question regarding outside air input. For my
design building I enter my outside air at the system level, as the minimum
outside air ratio, which I get from my equipment schedules. 90.1 requires
that the outside airflow be the same. To do this I take my summary report
from my design building and enter the values from that report into the baseline
model zones. When I run my baseline model the outside airflow rates from
the summary report match those of my design model, and my unmet heating hours
are good in both models, but the heating gas consumption in my baseline
building triples. The result is I am getting great, but unrealistic,
energy savings.<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>Does anyone know why this is happening? Why would
entering the OA at the zone level cause such increased heating for the save
total CFM entered at the system level? How are you folks typically
handling your outside ventilation air.<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>Any help would be greatly appreciated, thank you.<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
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<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif";
color:silver'>__________________________________________</span><span
style='font-size:10.0pt;font-family:"Tahoma","sans-serif";color:silver'><o:p></o:p></span></p>
</td>
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<p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif";
color:black'>Scott Tomlinson, PE, LEED-AP</span></b><span
style='font-size:10.0pt;font-family:"Tahoma","sans-serif";color:black'><o:p></o:p></span></p>
</td>
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<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif";
color:black'>Mechanical</span><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif";
color:black'><o:p></o:p></span></p>
</td>
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<p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif";
color:#004040'>Symmes Maini & McKee Associates, Inc.</span></b><span
style='font-size:10.0pt;font-family:"Tahoma","sans-serif";color:#004040'><o:p></o:p></span></p>
</td>
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<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif";
color:black'>1000 Massachusetts Avenue, Cambridge, MA 02138</span><span
style='font-size:10.0pt;font-family:"Tahoma","sans-serif";color:black'><o:p></o:p></span></p>
</td>
</tr>
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<td width=175 nowrap style='width:131.25pt;padding:0in 0in 0in 0in'>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif";
color:black'>t: 617.520.9438</span><span style='font-size:10.0pt;font-family:
"Tahoma","sans-serif";color:black'><o:p></o:p></span></p>
</td>
<td width=100 nowrap rowspan=4 style='width:75.0pt;padding:0in 0in 0in 0in'>
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font-family:"Times New Roman","serif"'><o:p></o:p></span></p>
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<p class=MsoNormal><span style='font-size:12.0pt;font-family:"Times New Roman","serif"'> </span><span
style='font-size:12.0pt;font-family:"Times New Roman","serif"'><o:p></o:p></span></p>
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<td style='padding:0in 0in 0in 0in'>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif";
color:black'>f: 617.354.5758</span><span style='font-size:10.0pt;font-family:
"Tahoma","sans-serif";color:black'><o:p></o:p></span></p>
</td>
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<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif";
color:black'><a href="mailto:STomlinson@smma.com"><span style='color:blue'>stomlinson@smma.com</span></a></span><span
style='font-size:10.0pt;font-family:"Tahoma","sans-serif";color:black'><o:p></o:p></span></p>
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<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif";
color:black'><a href="http://www.smma.com/"><span style='color:blue'>www.smma.com</span></a></span><span
style='font-size:10.0pt;font-family:"Tahoma","sans-serif";color:black'><o:p></o:p></span></p>
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<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
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