<html><head></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; ">Hi Leen,<div><br></div><div>I typically use the formula: ach (normal pressure) = ACH@50Pa/20, based on Kronvall and Persily - this is known as the KP model. </div><div><br></div><div>A more detailed model for converting ACH@50 can be found in Sherman 1987:</div><div><br></div><div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; font: normal normal normal 19px/normal Helvetica; "><font class="Apple-style-span" size="4"><b>Estimation of Infiltration from Leakage and Climate Indicators</b></font></div></div><div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; font: normal normal normal 9.8px/normal Times; "><i>Energy and Buildings, 10 </i>(1987) 81 - 86</div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; font: normal normal normal 9.8px/normal Times; "><br></div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; font: normal normal normal 9.8px/normal Times; "><font class="Apple-style-span" face="Helvetica" size="3">If your modelling a passive house it may be worth using a more sophisticated model than the KP model. You can also look in the EnergyPlus Engineering Reference manual, it discusses some methods developed by DOE etc for IBlast and DOE-2 to modify the actual infiltration rate for wind and other factors on an hourly basis according to the weather file.</font></div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; font: normal normal normal 9.8px/normal Times; "><font class="Apple-style-span" face="Helvetica" size="3"><br></font></div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; font: normal normal normal 9.8px/normal Times; "><font class="Apple-style-span" face="Helvetica" size="3">Regards,</font></div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; font: normal normal normal 9.8px/normal Times; "><font class="Apple-style-span" face="Helvetica" size="3">Hayes</font></div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; font: normal normal normal 9.8px/normal Times; "><font class="Apple-style-span" face="Helvetica" size="3"><br></font></div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; font: normal normal normal 9.8px/normal Times; "><font class="Apple-style-span" face="Helvetica" size="3"><br></font></div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; font: normal normal normal 9.8px/normal Times; "><font class="Apple-style-span" face="Helvetica" size="3"><div>Hayes Zirnhelt</div><div>M.A.Sc Candidate, RU Building Science</div><div>B.A.Sc Integrated Engineering</div><div><a href="mailto:hayes.zirnhelt@ryerson.ca">hayes.zirnhelt@ryerson.ca</a></div><div><br></div></font></div><div><div>On 2012-01-02, at 1:30 PM, <a href="mailto:bldg-sim-request@lists.onebuilding.org">bldg-sim-request@lists.onebuilding.org</a> wrote:</div><br class="Apple-interchange-newline"><blockquote type="cite">Send Bldg-sim mailing list submissions to<br><span class="Apple-tab-span" style="white-space:pre"> </span><a href="mailto:bldg-sim@lists.onebuilding.org">bldg-sim@lists.onebuilding.org</a><br><br>To subscribe or unsubscribe via the World Wide Web, visit<br><span class="Apple-tab-span" style="white-space:pre"> </span>http://lists.onebuilding.org/listinfo.cgi/bldg-sim-onebuilding.org<br>or, via email, send a message with subject or body 'help' to<br><span class="Apple-tab-span" style="white-space:pre"> </span>bldg-sim-request@lists.onebuilding.org<br><br>You can reach the person managing the list at<br><span class="Apple-tab-span" style="white-space:pre"> </span>bldg-sim-owner@lists.onebuilding.org<br><br>When replying, please edit your Subject line so it is more specific<br>than "Re: Contents of Bldg-sim digest..."<br>Today's Topics:<br><br> 1. infiltration rate passive building (leen peeters)<br> 2. Air temperature stratification layer in EnergyPlus (Sachin Sharma)<br> 3. Re: Radiant Floor Temperature in EnergyPlus (Sachin Sharma)<br><br><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px;"><span style="font-family:'Helvetica'; font-size:medium; color:rgba(127, 127, 127, 1.0);"><b>From: </b></span><span style="font-family:'Helvetica'; font-size:medium;">leen peeters <l.f.r.peeters@gmail.com><br></span></div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px;"><span style="font-family:'Helvetica'; font-size:medium; color:rgba(127, 127, 127, 1.0);"><b>Date: </b></span><span style="font-family:'Helvetica'; font-size:medium;">January 1, 2012 4:48:26 PM PST<br></span></div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px;"><span style="font-family:'Helvetica'; font-size:medium; color:rgba(127, 127, 127, 1.0);"><b>To: </b></span><span style="font-family:'Helvetica'; font-size:medium;">bldg-sim@lists.onebuilding.org<br></span></div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px;"><span style="font-family:'Helvetica'; font-size:medium; color:rgba(127, 127, 127, 1.0);"><b>Subject: </b></span><span style="font-family:'Helvetica'; font-size:medium;"><b>[Bldg-sim] infiltration rate passive building</b><br></span></div><br><br><div>Dear all,</div>
<div> </div>
<div>what is the standard (not 50Pa) infiltration rate I should use as input to the TRNSYS type56 building model in case of simulating a passive house?</div>
<div> </div>
<div>thanks!</div>
<div> </div>
<div>Leen</div>
<br></blockquote></div><br></div></body></html>