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<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>To include natural ventilation in a model all you need to do is
fill out the Natural Ventilation Tab at the System level under OA as follows. All
inputs have good descriptions of what needs to be entered so you shouldn’t have
a problem defining your system.<o:p></o:p></span></p>

<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>I am still currently building the model so am not sure if I am
going to come up with any errors. <o:p></o:p></span></p>

<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p> </o:p></span></p>

<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'> <img width=732 height=548 id="Picture_x0020_3"
src="cid:image002.png@01CB3A36.7E06F020"><o:p></o:p></span></p>

<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p> </o:p></span></p>

<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><img width=591 height=170 id="Picture_x0020_1"
src="cid:image001.png@01CB3A10.D83F35A0"
alt="Christie Rimes,  Building Simulation Analyst WSP Flack + Kurtz 405 Howard Street, Suite 500 San Francisco, CA 94105 Direct: 415.402.2727 Main Tel: 415.398.3833 Fax: 415.433.5311 website: http://www.wspfk.com vCard: http://vcards.wspfk.com/vcardloader.php?filename=flackkurtz-christie-rimes-wspfk-com-1255981339.vcf image: "><o:p></o:p></span></p>

<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
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"'> Zhen Tian
[mailto:tianzhen9@yahoo.com] <br>
<b>Sent:</b> Tuesday, August 10, 2010 10:21 AM<br>
<b>To:</b> Rimes, Christie<br>
<b>Subject:</b> Re: [Bldg-sim] LEED & Natural Ventilation<o:p></o:p></span></p>

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<p class=MsoNormal><o:p> </o:p></p>

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  <p class=MsoNormal>Hi Chris,<br>
  <br>
  Regarding the natural ventilation in eQUEST, how do we use the S-G function?
  I cannot find any information in the DOE2.2 manual. Would you please share
  more information?<br>
  <br>
  Thank you very much.<br>
  <br>
  Regards,<br>
  <br>
  David<br>
  <br>
  --- On <b>Fri, 7/30/10, Rimes, Christie <i><Christie.Rimes@wspfk.com></i></b>
  wrote:<o:p></o:p></p>
  <p class=MsoNormal style='margin-bottom:12.0pt'><br>
  From: Rimes, Christie <Christie.Rimes@wspfk.com><br>
  Subject: Re: [Bldg-sim] LEED & Natural Ventilation<br>
  To: "Chris" <floodyc@gmail.com><br>
  Cc: "bldg-sim@lists.onebuilding.org"
  <Bldg-sim@lists.onebuilding.org><br>
  Date: Friday, July 30, 2010, 2:40 AM<o:p></o:p></p>
  <div id=yiv531392559>
  <div>
  <p class=yiv531392559msonormal><span style='font-size:11.0pt;font-family:
  "Arial","sans-serif";color:#1F497D'>eQuest, TAS and IES, I know can model
  natural ventilation. In IES and TAS you can actually model the operation of
  the windows by defining limits on indoor temperature, wind speeds etc. eQuest
  is a little more basic where you can use a S-G function for infiltration
  which calculates higher infiltration rates based on outside wind conditions.
  eQuest then calculates if indoor temperatures will be kept between the indoor
  temperatures based on the outside conditions. If yes than it will shut off
  the mechanical system and calculate 0 energy for that hour.</span><o:p></o:p></p>
  <p class=yiv531392559msonormal><span style='font-size:11.0pt;font-family:
  "Arial","sans-serif";color:#1F497D'> </span><o:p></o:p></p>
  <p class=yiv531392559msonormal><span style='font-size:11.0pt;font-family:
  "Arial","sans-serif";color:#1F497D'>Therefore in programs like IES and TAS
  you may be able to keep conditions below the set point even if the outdoor
  temperatures are hotter due to air movement etc. You may also want to come to
  an agreement with the client to allow a slightly higher set point, however
  you will need to also apply this to the baseline model. Otherwise for LEED,
  you can’t take account for the hours were naturally ventilation doesn’t
  provide comfort. Also note that the unmet load hours can be a maximum of 300
  hours so potentially you could take credit for 300 hours for natural
  ventilation even if it is above the set point.  </span><o:p></o:p></p>
  <p class=yiv531392559msonormal><span style='font-size:11.0pt;font-family:
  "Arial","sans-serif";color:#1F497D'> </span><o:p></o:p></p>
  <p class=yiv531392559msonormal><span style='font-size:11.0pt;font-family:
  "Arial","sans-serif";color:#1F497D'> </span><o:p></o:p></p>
  <p class=yiv531392559msonormal><span style='font-size:11.0pt;font-family:
  "Arial","sans-serif";color:#1F497D'><img width=591 height=170
  id="yiv531392559Picture_x0020_1" src="cid:image001.png@01CB3A10.D83F35A0"
  alt="Christie Rimes,  Building Simulation Analyst WSP Flack + Kurtz 405 Howard Street, Suite 500 San Francisco, CA 94105 Direct: 415.402.2727 Main Tel: 415.398.3833 Fax: 415.433.5311 website: http://www.wspfk.com vCard: http://vcards.wspfk.com/vcardloader.php?filename=flackkurtz-christie-rimes-wspfk-com-1255981339.vcf image: "></span><o:p></o:p></p>
  <p class=yiv531392559msonormal><span style='font-size:11.0pt;font-family:
  "Arial","sans-serif";color:#1F497D'> </span><o:p></o:p></p>
  <div style='border:none;border-top:solid windowtext 1.0pt;padding:3.0pt 0in 0in 0in;
  border-color:-moz-use-text-color -moz-use-text-color'>
  <p class=yiv531392559msonormal><b><span style='font-size:10.0pt;font-family:
  "Arial","sans-serif"'>From:</span></b><span style='font-size:10.0pt;
  font-family:"Arial","sans-serif"'> Chris [mailto:floodyc@gmail.com] <br>
  <b>Sent:</b> Thursday, July 29, 2010 11:24 AM<br>
  <b>To:</b> Rimes, Christie<br>
  <b>Cc:</b> bldg-sim@lists.onebuilding.org<br>
  <b>Subject:</b> Re: [Bldg-sim] LEED & Natural Ventilation</span><o:p></o:p></p>
  </div>
  <p class=yiv531392559msonormal> <o:p></o:p></p>
  <div>
  <p class=yiv531392559msonormal><span style='font-family:"Comic Sans MS";
  color:#000066'>And how did you model the natural ventilation?</span><o:p></o:p></p>
  </div>
  <div>
  <p class=yiv531392559msonormal style='margin-bottom:12.0pt'><span
  style='font-family:"Comic Sans MS";color:#000066'>In summer when external
  temperatures are above the room setpoint natural ventilation during the day
  would not provide any cooling.</span><o:p></o:p></p>
  </div>
  <div>
  <p class=yiv531392559msonormal>On Thu, Jul 29, 2010 at 11:19, Rimes, Christie
  <<a href="/mc/compose?to=Christie.Rimes@wspfk.com" target="_blank">Christie.Rimes@wspfk.com</a>>
  wrote:<o:p></o:p></p>
  <div>
  <div>
  <p class=yiv531392559msonormal><span style='font-size:11.0pt;color:#1F497D'>I
  am currently doing a naturally ventilated building for LEED and I believe
  that if the space is achieving indoor temperatures between the given set
  point using natural ventilation than the mechanical system energy is 0 for
  the proposed design. Any hours where natural ventilation can’t achieve indoor
  temperatures within the set points, a mechanical system needs to be modeled
  even if there isn’t one in the proposed building. This helps keep the unmet
  hours within the requirements for LEED.</span><o:p></o:p></p>
  <p class=yiv531392559msonormal><span style='font-size:11.0pt;color:#1F497D'> </span><o:p></o:p></p>
  <p class=yiv531392559msonormal><span style='font-size:11.0pt;color:#1F497D'>Cheers,</span><o:p></o:p></p>
  <p class=yiv531392559msonormal><span style='font-size:11.0pt;color:#1F497D'> </span><o:p></o:p></p>
  <p class=yiv531392559msonormal><span style='font-size:11.0pt;color:#1F497D'><img
  border=0 width=591 height=170 id="yiv531392559_x005f_x0000_i1025"
  src="cid:image001.png@01CB3A10.D83F35A0"
  alt="Christie Rimes,  Building Simulation Analyst WSP Flack + Kurtz 405 Howard Street, Suite 500 San Francisco, CA 94105 Direct: 415.402.2727 Main Tel: 415.398.3833 Fax: 415.433.5311 website: http://www.wspfk.com vCard: http://vcards.wspfk.com/vcardloader.php?filename=flackkurtz-christie-rimes-wspfk-com-1255981339.vcf image: "></span><o:p></o:p></p>
  <p class=yiv531392559msonormal><span style='font-size:11.0pt;color:#1F497D'> </span><o:p></o:p></p>
  <div style='border:none;border-top:solid windowtext 1.0pt;padding:3.0pt 0in 0in 0in;
  border-color:-moz-use-text-color -moz-use-text-color'>
  <p class=yiv531392559msonormal><b><span style='font-size:10.0pt'>From:</span></b><span
  style='font-size:10.0pt'> <a
  href="/mc/compose?to=bldg-sim-bounces@lists.onebuilding.org" target="_blank">bldg-sim-bounces@lists.onebuilding.org</a>
  [mailto:<a href="/mc/compose?to=bldg-sim-bounces@lists.onebuilding.org"
  target="_blank">bldg-sim-bounces@lists.onebuilding.org</a>] <b>On Behalf Of </b>Chris<br>
  <b>Sent:</b> Thursday, July 29, 2010 11:13 AM<br>
  <b>To:</b> <a href="/mc/compose?to=bldg-sim@lists.onebuilding.org"
  target="_blank">bldg-sim@lists.onebuilding.org</a><br>
  <b>Subject:</b> [Bldg-sim] LEED & Natural Ventilation</span><o:p></o:p></p>
  </div>
  <div>
  <div>
  <p class=yiv531392559msonormal> <o:p></o:p></p>
  <div>
  <p class=yiv531392559msonormal><span style='font-family:"Comic Sans MS";
  color:#000066'>All,</span><o:p></o:p></p>
  </div>
  <div>
  <p class=yiv531392559msonormal> <o:p></o:p></p>
  </div>
  <div>
  <p class=yiv531392559msonormal><span style='font-family:"Comic Sans MS";
  color:#000066'>we regularly design and model buildings which rely in part on
  natural ventilation as a source of free cooling. The issue we are often faced
  with is how to capture this benefit when performing a LEED Appendix G
  analysis. Appendix G states that all conditioned spaces must have BOTH
  heating and cooling. We would like to remove mechanical coolig in the
  proposed design building and thus gain benefit when comparing to the
  mechanical cooling system in the reference baseline building.</span><o:p></o:p></p>
  </div>
  <div>
  <p class=yiv531392559msonormal> <o:p></o:p></p>
  </div>
  <div>
  <p class=yiv531392559msonormal><span style='font-family:"Comic Sans MS";
  color:#000066'>Has anyone tackled this issue and come to a satisfactory
  resolution? </span><o:p></o:p></p>
  </div>
  <div>
  <p class=yiv531392559msonormal> <o:p></o:p></p>
  </div>
  <div>
  <p class=yiv531392559msonormal><span style='font-family:"Comic Sans MS";
  color:#000066'>Thanks for your help.</span><o:p></o:p></p>
  </div>
  <div>
  <p class=yiv531392559msonormal><br clear=all>
  <br>
  -- <br>
  Chris Flood BSc (Eng)<br>
  Senior Building Analyst & Energy Modeller<o:p></o:p></p>
  </div>
  </div>
  </div>
  </div>
  </div>
  </div>
  <p class=yiv531392559msonormal><br>
  <br clear=all>
  <br>
  -- <br>
  Chris Flood BSc (Eng)<br>
  Senior Building Analyst & Energy Modeller<o:p></o:p></p>
  </div>
  </div>
  <p class=MsoNormal style='margin-bottom:12.0pt'><br>
  -----Inline Attachment Follows-----<o:p></o:p></p>
  <div>
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