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<DIV><FONT face=Arial size=2>Equest users,</FONT></DIV>
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<DIV><FONT face=Arial size=2>In this design I am modeling an air handler
that circulates 320 CFM of outside air whenever a CO2 sensor shows that the
concentration is above 1000 ppm. What is the best way to model this? In the
design development wizard there is an input for percentage outside air of supply
fan flow rate, but I don't want a fixed percentage, as it will be
demand-controlled. In the detailed edit there is an HVAC tab called "outside air
and economizer". I have selected "DCV Zone Sensors" and "Set by Critical Zone",
but I can't figure out how to set the flow rate. Can the C02 concentration be
converted into a minimum fraction of outdoor air? Any input is appreciated.
Thanks.</FONT></DIV>
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<P style="LINE-HEIGHT: 0in"><FONT color=#1f497d><FONT
face="Calibri, sans-serif"><FONT style="FONT-SIZE: 11pt" size=2>Brad
Painting</FONT></FONT></FONT></P>
<P style="LINE-HEIGHT: 0in"><FONT color=#1f497d><FONT
face="Calibri, sans-serif"><FONT style="FONT-SIZE: 11pt" size=2>LEED
Consultant</FONT></FONT></FONT></P>
<P style="LINE-HEIGHT: 0in"><FONT color=#1f497d><FONT
face="Calibri, sans-serif"><FONT style="FONT-SIZE: 11pt" size=2>Direct:
216-970-8541</FONT></FONT></FONT></P>
<P style="LINE-HEIGHT: 0in"><FONT color=#1f497d><FONT
face="Calibri, sans-serif"><FONT style="FONT-SIZE: 11pt" size=2>900 Ranch Road
620, Ste. C 101</FONT></FONT></FONT></P>
<P style="LINE-HEIGHT: 0in"><FONT color=#1f497d><FONT
face="Calibri, sans-serif"><FONT style="FONT-SIZE: 11pt" size=2>Austin, TX
78734</FONT></FONT></FONT></P>
<P style="LINE-HEIGHT: 0in"><A href="http://www.greenlivingcx.com"><FONT
style="FONT-SIZE: 11pt" size=2><FONT face="Calibri, sans-serif"><FONT
color=#1f497d>www.greenlivingcx.com</FONT></FONT></FONT></A></P>
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<P><FONT size=5><FONT face=Webdings><FONT
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