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<p class=MsoNormal><span style='font-size:12.0pt'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:12.0pt'>I’ve seen the “poor
man’s VAV” installed on several small commercial jobs in the last
few years – that is: packaged constant volume rooftop with zone dampers modulating
airflow to spaces and a supply-to-return bypass damper for excess supply air.<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:12.0pt'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:12.0pt'>Any suggestions which system
type to use in eQUEST / DOE-2 for this system?<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:12.0pt'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:12.0pt'>I’ve looked at CBVAV,
but that requires CHW cooling.<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:12.0pt'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:12.0pt'>I’m looking at PVVT right
now. It requires a variable flow supply fan, though, and doesn’t pick up the
changed evaporator entering conditions due to the bypassed cool supply air. <o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:12.0pt'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:12.0pt'>Any thoughts?<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:12.0pt'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:12.0pt'><o:p> </o:p></span></p>
<p class=MsoNormal style='line-height:150%;text-autospace:none'><b><span
style='font-size:9.0pt;line-height:150%;font-family:"Verdana","sans-serif";
color:gray'>Aaron Dahlstrom , PE, LEED® AP</span></b><o:p></o:p></p>
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