<html><body bgcolor="#FFFFFF"><div>The 50 Pa rating is based on the blower door pressure test. Actual pressure differences under normal conditions tend to avarage at about 1-2 Pa. Maybe you can find a CEN norm that defines a good pressure dP to assume for annual energy simulations. Or check the mathematical referance for the other infiltration types, because they often also reference standards and norms. If I find anything, I'll post it.<br><br>Sent from my iPhone</div><div><br>On 28.07.2012, at 18:34, Marcus <<a href="mailto:jones.0bj3@gmail.com">jones.0bj3@gmail.com</a>> wrote:<br><br></div><div></div><blockquote type="cite"><div>Say I want to simulate a passive house in TRNSYS using type 56. For an airtight building shell, passive house infiltration should be <span class="style_2">say ≤ 0.6 ACH @ 50 pascal pressure. <br>(<a href="http://www.passivehouse.us/passiveHouse/PassiveHouseInfo.html"><a href="http://www.passivehouse.us/passiveHouse/PassiveHouseInfo.html">http://www.passivehouse.us/passiveHouse/PassiveHouseInfo.html</a></a>)<br clear="all">
</span><br>The type 56 TRNBLD units for infiltration; are they at static or at 50 pa? If they are at static, I need to divide 0.6 by ~ 20 (estimate from Sherman 1987), so I input Airchange = 0.03 1/hr. Correct? <br><br>Cheers,<br>
<br>Marcus<br>-- <br><span style="color:rgb(0,0,0)">Marcus Jones, </span><span style="color:rgb(0,0,0)"> M.Sc.</span><span style="color:rgb(0,0,0)">, </span><a style="color:rgb(0,0,0)" name="SafeHtmlFilter_131245b5df81718e__MailAutoSig"><span style="font-size:10pt"></span></a><span style="color:rgb(0,0,0)"><span style="font-size:10pt">LEED<sup>®</sup>AP BD+C</span></span><br style="color:rgb(0,0,0)">
<i style="color:rgb(0,0,0)">Freelance energy consultant</i><br style="color:rgb(0,0,0)"><i style="color:rgb(0,0,0)">Vienna, Austria</i><br><br>
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