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<p class=MsoNormal>Hello, I would like to say first that so far the forum has
been very helpful!<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>I am trying to model a CV system as a base case and then a VAV
as a change case. In the DD Wizard I am using the Multi-zone system with HW
heat. For a CV system I set the minimum VAV to 100% and set the fans to
vane-axial. For the VAV system I am going back and setting the minimum to
30% and the fans to VSD.<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>I feel the CV system is fairly close, but the VAV system is coming
up with too low of a gas consumption (A 70% difference).<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoListParagraph style='text-indent:-.25in;mso-list:l0 level1 lfo1'><![if !supportLists]><span
style='mso-list:Ignore'>1.<span style='font:7.0pt "Times New Roman"'>
</span></span><![endif]>Am I taking the proper approach?<o:p></o:p></p>
<p class=MsoListParagraph style='text-indent:-.25in;mso-list:l0 level1 lfo1'><![if !supportLists]><span
style='mso-list:Ignore'>2.<span style='font:7.0pt "Times New Roman"'>
</span></span><![endif]>What would cause this large of a change? (A decrease in
OA required?)<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>Thank you for any help you can give me,<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
lang=EN style='font-size:12.0pt;font-family:"Times New Roman","serif"'>Jordan
Goldsmith, E.I.T.<o:p></o:p></span></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
lang=EN style='font-size:12.0pt;font-family:"Times New Roman","serif"'>National
Center for Appropriate Technology<o:p></o:p></span></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
lang=EN style='font-size:12.0pt;font-family:"Times New Roman","serif"'>3040
Continental Drive, Butte MT 59702<o:p></o:p></span></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
lang=EN style='font-size:12.0pt;font-family:"Times New Roman","serif"'>406-494-8651<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN style='font-size:12.0pt;font-family:"Times New Roman","serif"'>jordang@ncat.org</span><o:p></o:p></p>
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