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<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>I have also noticed that you have to be
careful about how you specify OA for induction systems. If I enter zone-level
OA <span class=SpellE>cfm</span> and also enter system-level SUPPLY-FLOW, I end
up with NO outside air even though the MIN-OUTSIDE-AIR is set to 1.00. The
problem goes away if I enter a system MIN-AIR-SCH (whether or not I have the
SUPPLY-FLOW entered) or if I leave the SUPPLY-FLOW blank (default).<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>To get a better idea of what the OA is
actually doing, I create an Hourly Report Block and select the following
options under the “HVAC System” variable type:<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>“Ratio of outside air to total supply
air” <o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>“Total system supply air flow rate”<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>There are a ton of other variables
available in the hourly reports that you can use to troubleshoot your models.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>Regards,<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<div>
<p class=MsoNormal><b style='mso-bidi-font-weight:normal'><font size=2
color=black face="Franklin Gothic Medium"><span style='font-size:10.0pt;
font-family:"Franklin Gothic Medium";color:black;font-weight:bold;mso-bidi-font-weight:
normal;mso-no-proof:yes'>William Bishop, EIT, LEED<sup>®</sup> AP </span></font></b><b
style='mso-bidi-font-weight:normal'><font size=2 color="#006600"
face="Franklin Gothic Medium"><span style='font-size:10.0pt;font-family:"Franklin Gothic Medium";
color:#006600;font-weight:bold;mso-bidi-font-weight:normal;mso-no-proof:yes'>|</span></font></b><b
style='mso-bidi-font-weight:normal'><font size=2 color=black
face="Franklin Gothic Medium"><span style='font-size:10.0pt;font-family:"Franklin Gothic Medium";
color:black;font-weight:bold;mso-bidi-font-weight:normal;mso-no-proof:yes'> </span></font></b><b
style='mso-bidi-font-weight:normal'><font size=2 color=black
face="Franklin Gothic Medium"><span style='font-size:10.0pt;mso-bidi-font-size:
12.0pt;font-family:"Franklin Gothic Medium";color:black;font-weight:bold;
mso-bidi-font-weight:normal;mso-no-proof:yes'>Pathfinder Engineers &
Architects LLP</span></font></b><b><font size=2 color=black
face="Franklin Gothic Medium"><span style='font-size:10.0pt;font-family:"Franklin Gothic Medium";
color:black;font-weight:bold;mso-no-proof:yes'><o:p></o:p></span></font></b></p>
<p class=MsoNormal><font size=1 color=black face=Arial><span style='font-size:
9.0pt;font-family:Arial;color:black;mso-no-proof:yes'>Mechanical Engineer<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=1 color=black face=Arial><span style='font-size:
5.0pt;font-family:Arial;color:black;mso-no-proof:yes'><o:p> </o:p></span></font></p>
<p class=MsoNormal><st1:address w:st="on"><st1:Street w:st="on"><font size=1
color=navy face=Arial><span style='font-size:9.0pt;font-family:Arial;
color:navy;mso-no-proof:yes'>134 South Fitzhugh Street</span></font></st1:Street><font
size=1 color=navy><span style='font-size:9.0pt;color:navy;mso-no-proof:yes'><br>
</span></font><st1:City w:st="on"><font size=1 color=navy face=Arial><span
style='font-size:9.0pt;font-family:Arial;color:navy;mso-no-proof:yes'>Rochester</span></font></st1:City><font
size=1 color=navy face=Arial><span style='font-size:9.0pt;font-family:Arial;
color:navy;mso-no-proof:yes'>, <st1:State w:st="on">NY</st1:State> <st1:PostalCode
w:st="on">14608</st1:PostalCode></span></font></st1:address><font size=1
color=navy><span style='font-size:9.0pt;color:navy;mso-no-proof:yes'><br>
</span></font><font size=1 color=navy face=Arial><span style='font-size:9.0pt;
font-family:Arial;color:navy;mso-no-proof:yes'>T: (585) 325-6004 </span></font><font
size=1 color=black face=Arial><span style='font-size:9.0pt;font-family:Arial;
color:black;mso-no-proof:yes'>Ext. 114</span></font><font size=1 color=navy><span
style='font-size:9.0pt;color:navy;mso-no-proof:yes'><br>
</span></font><font size=1 color=navy face=Arial><span style='font-size:9.0pt;
font-family:Arial;color:navy;mso-no-proof:yes'>F: (585) 325-6005</span></font><font
size=1 color=black face=Arial><span style='font-size:9.0pt;mso-bidi-font-size:
12.0pt;font-family:Arial;color:black;mso-no-proof:yes'><o:p></o:p></span></font></p>
<p class=MsoNormal><font size=1 color=black face=Arial><span style='font-size:
9.0pt;font-family:Arial;color:black;mso-no-proof:yes'>wbishop@pathfinder-ea.com<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=1 color=black face=Arial><span style='font-size:
9.0pt;mso-bidi-font-size:12.0pt;font-family:Arial;color:black;mso-no-proof:
yes'>www.pathfinder-ea.com</span></font><font color=navy><span
style='color:navy;mso-no-proof:yes'><o:p></o:p></span></font></p>
<p class=MsoNormal><font size=5 color=green face=Webdings><span
style='font-size:18.0pt;font-family:Webdings;mso-bidi-font-family:Webdings;
color:green;mso-no-proof:yes'>P</span></font><font color=green><span
style='color:green;mso-no-proof:yes'> </span></font><font size=1 color=green><span
style='font-size:7.5pt;color:green;mso-no-proof:yes'>Please strive to live
sustainably.</span></font><font color=green><span style='color:green'><o:p></o:p></span></font></p>
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<hr size=2 width="100%" align=center tabindex=-1>
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<p class=MsoNormal><b><font size=2 face=Tahoma><span style='font-size:10.0pt;
font-family:Tahoma;font-weight:bold'>From:</span></font></b><font size=2
face=Tahoma><span style='font-size:10.0pt;font-family:Tahoma'>
equest-users-bounces@lists.onebuilding.org
[mailto:equest-users-bounces@lists.onebuilding.org] <b><span style='font-weight:
bold'>On Behalf Of </span></b>Verena Kindl<br>
<b><span style='font-weight:bold'>Sent:</span></b> Friday, September 11, 2009
9:13 AM<br>
<b><span style='font-weight:bold'>To:</span></b> <st1:place w:st="on"><st1:City
w:st="on">Bouchard</st1:City>, <st1:country-region w:st="on">Jordan</st1:country-region></st1:place>;
equest-users@lists.onebuilding.org<br>
<b><span style='font-weight:bold'>Subject:</span></b> Re: [Equest-users]
outside air ratio</span></font><o:p></o:p></p>
</div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span lang=EN-GB
style='font-size:10.0pt;font-family:Arial;color:navy;mso-ansi-language:EN-GB'>Thank
you, but i already thought about that and i have nothing specified there. But
now I tried to specify the flow to each zone instead of doing it for the whole
system and then the outdoor air ratio is calculated correctly. Of course I
considered the induction ratio so I specified for each zone 1962 cfm supply
flow (induction ratio of 2) then I get an outdoor air ratio of 1 and 918 cfm OA
per zone. Do you think I can do that? It is strange so as the other way should
work as well. <o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span lang=EN-GB
style='font-size:10.0pt;font-family:Arial;color:navy;mso-ansi-language:EN-GB'><o:p> </o:p></span></font></p>
<div>
<div class=MsoNormal align=center style='text-align:center'><font size=3
face="Times New Roman"><span lang=DE style='font-size:12.0pt;mso-ansi-language:
DE'>
<hr size=2 width="100%" align=center tabindex=-1>
</span></font></div>
<p class=MsoNormal><b><font size=2 face=Tahoma><span lang=EN-GB
style='font-size:10.0pt;font-family:Tahoma;mso-ansi-language:EN-GB;font-weight:
bold'>Von:</span></font></b><font size=2 face=Tahoma><span lang=EN-GB
style='font-size:10.0pt;font-family:Tahoma;mso-ansi-language:EN-GB'> <st1:place
w:st="on"><st1:City w:st="on">Bouchard</st1:City>, <st1:country-region w:st="on">Jordan</st1:country-region></st1:place>
[mailto:Jordan.Bouchard@stantec.c</span></font><font size=2 face=Tahoma><span
lang=DE style='font-size:10.0pt;font-family:Tahoma;mso-ansi-language:DE'>om] <br>
<b><span style='font-weight:bold'>Gesendet:</span></b> Freitag, 11. September
2009 15:08<br>
<b><span style='font-weight:bold'>An:</span></b> Verena Kindl;
equest-users@lists.onebuilding.org<br>
<b><span style='font-weight:bold'>Betreff:</span></b> RE: [Equest-users] outside
air ratio</span></font><span lang=DE style='mso-ansi-language:DE'><o:p></o:p></span></p>
</div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span lang=DE
style='font-size:12.0pt;mso-ansi-language:DE'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=3 color=black face="Times New Roman"><span
style='font-size:12.0pt;color:black'>Hi Verena,<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=3 color=black face="Times New Roman"><span
style='font-size:12.0pt;color:black'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=3 color=black face="Times New Roman"><span
style='font-size:12.0pt;color:black'>Check your zone level OA values. If you
want to specify 100% OA at the system level you have to clear the zone level
inputs as they will override the system level OA inputs.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=3 color=black face="Times New Roman"><span
style='font-size:12.0pt;color:black'>Regards,<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=3 color=black face="Times New Roman"><span
style='font-size:12.0pt;color:black'><o:p> </o:p></span></font></p>
<div>
<p class=MsoNormal><b><font size=1 color=black face=Arial><span
style='font-size:9.0pt;font-family:Arial;color:black;font-weight:bold'>Jordan
Bouchard, LEED® AP</span></font></b><font size=1 color=black face=Arial><span
style='font-size:9.0pt;font-family:Arial;color:black'><br>
Mechanical Engineer In Training<br>
Stantec Consulting Ltd.<br>
</span></font><font size=1 color=gray face=Arial><span style='font-size:9.0pt;
font-family:Arial;color:gray'>Ph: (416) 596-6686<br>
Fx: (416) 596-6680<br>
Jordan.Bouchard@stantec.com </span></font><font size=1 color=black face=Arial><span
style='font-size:9.0pt;font-family:Arial;color:black'><o:p></o:p></span></font></p>
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color="#003f6e"><span style='color:#003F6E;text-decoration:none;text-underline:
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<p class=MsoNormal><b><font size=2 face=Tahoma><span style='font-size:10.0pt;
font-family:Tahoma;font-weight:bold'>From:</span></font></b><font size=2
face=Tahoma><span style='font-size:10.0pt;font-family:Tahoma'>
equest-users-bounces@lists.onebuilding.org
[mailto:equest-users-bounces@lists.onebuilding.org] <b><span style='font-weight:
bold'>On Behalf Of </span></b>Verena Kindl<br>
<b><span style='font-weight:bold'>Sent:</span></b> Friday, September 11, 2009
8:57 AM<br>
<b><span style='font-weight:bold'>To:</span></b> <st1:PersonName w:st="on">equest-users@lists.onebuilding.org</st1:PersonName><br>
<b><span style='font-weight:bold'>Subject:</span></b> [Equest-users] outside
air ratio</span></font><o:p></o:p></p>
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<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span lang=DE
style='font-size:10.0pt;font-family:Arial;color:navy;mso-ansi-language:DE'>Hi
all,<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span lang=DE
style='font-size:10.0pt;font-family:Arial;color:navy;mso-ansi-language:DE'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span lang=EN-GB
style='font-size:10.0pt;font-family:Arial;color:navy;mso-ansi-language:EN-GB'>I
have an induction unit for the whole building, supplying 204000 cfm outside air
to the building. So I specify the supply flow of the system (204000 cfm) and
set the min outside air ratio =1. In the SV-A report it shows on the system
level 0 outside air and therefore no cooling/heating capacity and for the zone
it shows about 800-1100 cfm outside air. Only if I do not specify the supply
flow on the system level then I also get an outside air ratio of 1 for the
system level. Why is it not possible to tell equest that the 204000 cfm it
supplies is only outside air. I have not specified an economizer so it should
be outside air all the time ??<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span lang=EN-GB
style='font-size:10.0pt;font-family:Arial;color:navy;mso-ansi-language:EN-GB'>Have
a nice weekend.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span lang=EN-GB
style='font-size:10.0pt;font-family:Arial;color:navy;mso-ansi-language:EN-GB'><o:p> </o:p></span></font></p>
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