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<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>Amen to that!<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'>Stated another way, almost anyone who thinks they know (with any
precision) the infiltration rate of any building is misinformed.<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'>Thanks, Chris, for the references. I was unfamiliar with
them, probably due to giving up hope for any accurate way to estimate
infiltration long ago. <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'>That said, more effort is being spent on understanding and reducing
infiltration in recent years and, while the <u>estimation</u> of infiltration
may not improve, the construction practices which <u>allow</u> infiltration may
very well improve as a result!<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>
<div>
<p class=MsoNormal align=center style='text-align:center'><b><span
style='font-size:13.5pt;color:#1F497D'>The Building Performance Team<br>
</span></b><b><span style='color:#1F497D'>James V. Dirkes II, P.E., LEED AP<br>
</span></b><span style='color:#1F497D'>1631 Acacia Drive NW<br>
Grand Rapids, MI 49504<br>
616 450 8653<o:p></o:p></span></p>
</div>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p> </o:p></span></p>
<div>
<div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in 0in 0in'>
<p class=MsoNormal style='margin-left:.5in'><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>Chris
Balbach<br>
<b>Sent:</b> Thursday, July 01, 2010 5:57 PM<br>
<b>To:</b> 'Nick Caton'; 'Vinay Devanathan'; bldg-sim@lists.onebuilding.org<br>
<b>Subject:</b> Re: [Bldg-sim] Infiltration<o:p></o:p></span></p>
</div>
</div>
<p class=MsoNormal style='margin-left:.5in'><o:p> </o:p></p>
<p class=MsoNormal style='margin-left:.5in'><span style='font-size:10.0pt;
font-family:"Arial","sans-serif";color:blue'>Vinay et. al:</span><o:p></o:p></p>
<p class=MsoNormal style='margin-left:.5in'> <o:p></o:p></p>
<p class=MsoNormal style='margin-left:.5in'><u><span style='font-size:10.0pt;
font-family:"Arial","sans-serif";color:blue'>Understanding and Estimating Large
Building Infiltration</span></u><span style='font-size:10.0pt;font-family:"Arial","sans-serif";
color:blue'>.... One of those 'Defense of the Dark Arts' courses at Hogwarts!</span><o:p></o:p></p>
<p class=MsoNormal style='margin-left:.5in'> <o:p></o:p></p>
<p class=MsoNormal style='margin-left:.5in'><span style='font-size:10.0pt;
font-family:"Arial","sans-serif";color:blue'>Reminds me of a quote from Donald
Rumsfield: "... because as we know, there are known knowns; there are
things we know we know. We also know there are known unknowns, that is to say
we know there are some things we do not know. But there are also unknown
unknowns - the ones we don't know we don't know"</span><o:p></o:p></p>
<p class=MsoNormal style='margin-left:.5in'> <o:p></o:p></p>
<p class=MsoNormal style='margin-left:.5in'><span style='font-size:10.0pt;
font-family:"Arial","sans-serif";color:blue'>Chew on that one for awhile...</span><o:p></o:p></p>
<p class=MsoNormal style='margin-left:.5in'> <o:p></o:p></p>
<p class=MsoNormal style='margin-left:.5in'><span style='font-size:10.0pt;
font-family:"Arial","sans-serif";color:blue'>If there was such a course, I'd
recommend the attached pdf be in the list of required reading.. If nothing
else it's a gold mine refererence for explaining to your client why 'measuring'
infiltration rates in his/her building, while theoetically possible, it most
likely would require an ENORMOUS amount of cash and airflow to generate a
meaningful "reference pressure". This document is "solid"
on the fundamentals. </span><o:p></o:p></p>
<p class=MsoNormal style='margin-left:.5in'> <o:p></o:p></p>
<p class=MsoNormal style='margin-left:.5in'><span style='font-size:10.0pt;
font-family:"Arial","sans-serif";color:blue'>So, if you want to do it
'right' - this pdf will help you correctly specify a infiltration measurement
test procedure to be performed by a qualified 'Testing Agency. I'd bring
several bags of cash with me.</span><o:p></o:p></p>
<p class=MsoNormal style='margin-left:.5in'> <o:p></o:p></p>
<p class=MsoNormal style='margin-left:.5in'><span style='font-size:10.0pt;
font-family:"Arial","sans-serif";color:blue'>The fallback here that many of us
may find useful are the 'standards' tables on pages 5, 6, and 7. If you don't
measure, you will have to estimate, and atleast these 'standards' will give you
a sense of how 'non-standard' your final estimate is.. We have to work with
what we have.. </span><o:p></o:p></p>
<p class=MsoNormal style='margin-left:.5in'> <o:p></o:p></p>
<p class=MsoNormal style='margin-left:.5in'><span style='font-size:10.0pt;
font-family:"Arial","sans-serif";color:blue'>ASHRAE's RP-935: "Protocol
for Field Testing of Tall Buildings to Determine Envelope Air Leakage
Rate" - (Available free to ASHRAE members through the ASHRAE bookstore) is
another good reference to get familiar with possible methods for better
understanding the "known unknowns".... As for the "unknown
unknowns" - thank god for ASHRAE research. </span><o:p></o:p></p>
<p class=MsoNormal style='margin-left:.5in'> <o:p></o:p></p>
<p class=MsoNormal style='margin-left:.5in'> <o:p></o:p></p>
<p class=MsoNormal style='margin-left:.5in'><span style='font-size:10.0pt;
font-family:"Arial","sans-serif";color:blue'>All the Best,</span><o:p></o:p></p>
<p class=MsoNormal style='margin-left:.5in'> <o:p></o:p></p>
<p class=MsoNormal style='margin-left:.5in'><span style='font-size:10.0pt;
font-family:"Arial","sans-serif";color:blue'>_Chris</span><o:p></o:p></p>
<p class=MsoNormal style='margin-left:.5in'> <o:p></o:p></p>
<p class=MsoNormal style='margin-left:.5in'><span style='font-size:10.0pt;
font-family:"Arial","sans-serif";color:blue'>Chris Balbach, PE, CEM BEMP, CMVP</span><o:p></o:p></p>
<p class=MsoNormal style='margin-left:.5in'><span style='font-size:10.0pt;
font-family:"Arial","sans-serif";color:blue'>Vice President of Research and
Development</span><o:p></o:p></p>
<p class=MsoNormal style='margin-left:.5in'><span style='font-size:10.0pt;
font-family:"Arial","sans-serif";color:blue'>Performance Systems Development of
NY, LLC</span><o:p></o:p></p>
<p class=MsoNormal style='margin-left:.5in'><span style='font-size:10.0pt;
font-family:"Arial","sans-serif";color:blue'>124 Brindley Street, Suite 4,
Ithaca NY 14850</span><o:p></o:p></p>
<p class=MsoNormal style='margin-left:.5in'><span style='font-size:10.0pt;
font-family:"Arial","sans-serif";color:blue'><a
href="http://www.psdconsulting.com">http://www.psdconsulting.com</a></span><o:p></o:p></p>
<p class=MsoNormal style='margin-left:.5in'><span style='font-size:10.0pt;
font-family:"Arial","sans-serif";color:blue'>ph: (607)-327-1647</span><o:p></o:p></p>
<p class=MsoNormal style='margin-left:.5in'> <o:p></o:p></p>
<p class=MsoNormal style='margin-left:.5in'> <o:p></o:p></p>
<p class=MsoNormal style='margin-left:.5in'> <o:p></o:p></p>
<p class=MsoNormal style='margin-left:.5in'><o:p> </o:p></p>
<div class=MsoNormal align=center style='margin-left:.5in;text-align:center'>
<hr size=2 width="100%" align=center>
</div>
<p class=MsoNormal style='mso-margin-top-alt:0in;margin-right:0in;margin-bottom:
12.0pt;margin-left:.5in'><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>Nick Caton<br>
<b>Sent:</b> Thursday, July 01, 2010 5:14 PM<br>
<b>To:</b> Vinay Devanathan; bldg-sim@lists.onebuilding.org<br>
<b>Subject:</b> Re: [Bldg-sim] Infiltration</span><o:p></o:p></p>
<p class=MsoNormal style='margin-left:.5in'><span style='font-size:11.0pt;
font-family:"Calibri","sans-serif";color:#1F497D'>That’s typical in my
experience.<o:p></o:p></span></p>
<p class=MsoNormal style='margin-left:.5in'><span style='font-size:11.0pt;
font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal style='margin-left:.5in'><span style='font-size:11.0pt;
font-family:"Calibri","sans-serif";color:#1F497D'>Infiltration is figured
primarily based on temperature and pressure differential (wind speed
vs.interior pressurization) across an exterior surface, among other
things. Lacking any exterior surfaces, I would presume any
“interior cross-zonal infiltration” is generally negligible, unless
you might be dealing with a large positively pressurized unconditioned
space…?<o:p></o:p></span></p>
<p class=MsoNormal style='margin-left:.5in'><span style='font-size:11.0pt;
font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal style='margin-left:.5in'><span style='font-size:11.0pt;
font-family:"Calibri","sans-serif";color:#1F497D'>~Nick<o:p></o:p></span></p>
<p class=MsoNormal style='margin-left:.5in'><span style='font-size:11.0pt;
font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal style='margin-left:.5in'><span style='font-size:11.0pt;
font-family:"Calibri","sans-serif";color:#1F497D'><img border=0 width=119
height=37 id="Picture_x0020_1" src="cid:image001.jpg@01CB19CB.2E387AE0"
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font-family:"Stylus BT","sans-serif";color:#2D4D5E'><o:p> </o:p></span></b></p>
<p class=MsoNormal style='margin-left:.5in'><b><span style='font-size:11.0pt;
font-family:"Stylus BT","sans-serif";color:#2D4D5E'>NICK CATON, E.I.T.</span></b><b><span
style='font-family:"Stylus BT","sans-serif";color:#2D4D5E'><o:p></o:p></span></b></p>
<p class=MsoNormal style='margin-left:.5in'><span style='font-size:7.5pt;
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<p class=MsoNormal style='margin-left:.5in'><span style='font-size:10.0pt;
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font-family:"Calibri","sans-serif";color:#2D4D5E'>Check out our new web-site @ </span></i><span
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<p class=MsoNormal style='margin-left:.5in'><span style='font-size:11.0pt;
font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p>
<div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in 0in 0in'>
<p class=MsoNormal style='margin-left:.5in'><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>Vinay Devanathan<br>
<b>Sent:</b> Thursday, July 01, 2010 2:57 PM<br>
<b>To:</b> bldg-sim@lists.onebuilding.org<br>
<b>Subject:</b> [Bldg-sim] Infiltration<o:p></o:p></span></p>
</div>
<p class=MsoNormal style='margin-left:.5in'><o:p> </o:p></p>
<p class=MsoNormal style='margin-left:.5in'>Hello,<br>
<br>
While performing energy modeling, I am guessing it is enough if we account
infiltration just for the zones in contact with the exterior environment? Am I
right?<br>
Or do we have to include interior zones in infiltration calc?<br>
<br>
Thank you.<br>
<br>
Regards,<br>
Vinay<o:p></o:p></p>
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