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<p class=MsoNormal><span style='color:#1F497D'>Hi Lizzy, here is a great answer
from David on a similar topic that was posted to the list last November. Be
sure to search the archives, you might find the rest of the conversation
helpful also.<o:p></o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='color:black'>Quick answer:<o:p></o:p></span></p>
<p class=MsoNormal><span style='color:black'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='color:black'>90.1 does not care if you are
pursuing EQC2, use the same OA quantities in baseline and proposed for EAC1.<o:p></o:p></span></p>
<p class=MsoNormal><span style='color:black'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='color:black'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='color:black'>Long answer:<o:p></o:p></span></p>
<p class=MsoNormal><span style='color:black'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='color:black'>These are separate credits –
the modeling takes place based on the proposed design in comparison to a
baseline that is only restricted by 90.1. The OA requirement should be
the same in both models subject to any DCV or exceptional calcs or
technologies. This is not affected by other LEED credits. <o:p></o:p></span></p>
<p class=MsoNormal><span style='color:black'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='color:black'>The credit for increased
ventilation takes place “before” modeling starts. This is
besides the many cases for laboratories or hospitals where the local code
ventilation requirements are much greater than ASHRAE 62.1 already – the
proposed design is in effect already taking the EAC1 penalty but earning the
credit for increased ventilation under the best practice design. You wouldn’t
relax the baseline ventilation to less than 30% in these cases!<o:p></o:p></span></p>
<p class=MsoNormal><span style='color:black'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='color:black'>I’m sure there are some
proposed buildings out there that condition OA very effectively, and may gain
EAC1 gross energy cost savings by having increased ventilation, but even where
that effect occurs there is the question of percentage savings applying
to a larger energy consumption and cost.<o:p></o:p></span></p>
<p class=MsoNormal><span style='color:black'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='color:black'>Overall if you gain EAC1 points by
pursuing increased ventilation, I think you have worked well within the system
– good for you in designing a system to condition outside air so
effectively. For many projects (other than labs or hospitals which may
have to use that quantity of OA anyway) I would expect EQC2 could be trading
for an EAC1 credit, so you’ll have to prioritize. Both are rewarded
from USGBC, but EAC1 is also rewarded in lower utility bills.<o:p></o:p></span></p>
<p class=MsoNormal><span style='color:black'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='color:black'>David<o:p></o:p></span></p>
<p class=MsoNormal><span style='color:black'><a
href="http://www.grummanbutkus.com">http://www.grummanbutkus.com</a><o:p></o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'>Sincerely,<o:p></o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p>
<div>
<p class=MsoNormal><b><span style='font-family:"BankGothic Md BT","sans-serif";
color:#1F497D'>Matt Dubrovich, </span></b><span style='font-family:"BankGothic Md BT","sans-serif";
color:#1F497D'>P.E.<i><o:p></o:p></i></span></p>
<p class=MsoNormal><span style='font-family:"BankGothic Md BT","sans-serif";
color:#1F497D'>LEED AP</span><span style='color:#1F497D'><o:p></o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'> <o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif";
color:#1F497D'>EMC Engineers, Inc.<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif";
color:#1F497D'><a href="http://www.emcengineers.com/">www.emcengineers.com</a></span><u><span
style='font-size:12.0pt;font-family:"Times New Roman","serif";color:blue'><o:p></o:p></span></u></p>
<p class=MsoNormal style='mso-margin-top-alt:5.0pt;margin-right:0in;margin-bottom:
5.0pt;margin-left:0in'><b><span style='font-family:"Arial","sans-serif";
color:#1F497D'>Making buildings work. </span></b><b><span style='font-family:
"Arial","sans-serif";color:red'>Better.</span></b><b><span style='color:red'><o:p></o:p></span></b></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif";
color:#1F497D'>(303) 974-1217 - direct<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif";
color:#1F497D'>(720) 279-4426 - mobile<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif";
color:#1F497D'>(303) 974-1239 - fax<o:p></o:p></span></p>
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color:#1F497D'><o:p> </o:p></span></p>
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<p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p>
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<p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>From:</span></b><span
style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'> bldg-sim-bounces@lists.onebuilding.org
[mailto:bldg-sim-bounces@lists.onebuilding.org] <b>On Behalf Of </b>Lizzy Guhl<br>
<b>Sent:</b> Monday, March 22, 2010 6:39 AM<br>
<b>To:</b> bldg-sim@lists.onebuilding.org<br>
<b>Subject:</b> [Bldg-sim] Ventilation rates in industrial buildings<o:p></o:p></span></p>
</div>
</div>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal><span lang=ES>Dear All,<o:p></o:p></span></p>
<p class=MsoNormal><span lang=ES><o:p> </o:p></span></p>
<p class=MsoNormal>I am modeling an industrial building for Leed compliance and
I have some doubts about how to model the proposed and baseline building:<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>The ventilation rates defined by the user for most of the
zones are much higher than the required rates. The point is that we just can´t
reach the necessary savings due to the high ventilation rates and therefore we
recommended to reduce them. Now my question is how to model this for Leed
compliance. Is it necessary to model both the baseline and proposed building
with the same ventilation rates? Or do I need to model the baseline building
with the required rates according to Ashrae 90.1 and the proposed building with
the defined rates? Suggestions are highly appreciated. <o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>Regards,<o:p></o:p></p>
<p class=MsoNormal>Lizzy<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal style='margin-bottom:12.0pt'><span lang=EN-GB
style='font-size:10.0pt;color:#339966'>LIZZY GUHL<br>
</span><span lang=EN-GB style='font-size:10.0pt;color:gray'>Dipl. Ing. (FH)
Mechanical Engineering </span><span style='font-size:9.0pt;color:#64615F'>|</span><span
lang=EN-GB style='font-size:10.0pt;color:gray'> Sustainable Design Consultant</span><span
lang=EN-GB style='font-size:10.0pt;color:teal'><o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-GB style='font-size:10.0pt;color:teal'><o:p> </o:p></span></p>
<p class=MsoNormal><span lang=EN-GB style='font-size:10.0pt;color:#339966'>ENERGY</span><span
lang=EN-GB style='font-size:10.0pt;color:teal'> </span><span style='font-size:
10.0pt;color:gray'>A R Q</span><span lang=EN-GB style='font-size:10.0pt;
color:teal'><br>
</span><span style='font-size:10.0pt;color:gray'>Sustainability | Energy |
Building Simulations | LEED®</span><span lang=EN-GB style='font-size:10.0pt;
color:teal'><br>
</span><span lang=EN-GB style='font-size:10.0pt;color:gray'>Member of the
United States Green Building Council (USGBC)</span><span
lang=EN-GB style='font-size:10.0pt;color:teal'><br>
</span><span lang=EN-GB style='font-size:10.0pt;color:gray'>Chile: Juan
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</span><span lang=EN-GB style='font-size:10.0pt;color:gray'>www.energyarq.com<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-GB style='font-size:10.0pt;color:gray'><o:p> </o:p></span></p>
<p class=MsoNormal><span lang=ES-MX style='font-size:13.5pt;font-family:Webdings;
color:#2A8168'>P</span><span style='font-size:13.5pt;color:#2A8168'> </span><span
style='font-size:9.0pt;color:#2A8168'>Consider the environment before printing
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