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<font size="+1"><tt>Current ASHRAE fundamentals 2009 has this
information in Chapter 16. Various testing indicates a
magnitude of 10 between tight and loose. The older the building
the more leaky it typically is. I have seen testing with
magnitude differences of 20 on homes between 5 and 25 years old.
You also have wind and stack effects. A blower door test is a
quick and cheap way to get a effective air leakage area. It
will give you better results in predicting the economic impacts
of improvements and sizing your systems. The blower door
operator can also take a smoke generator and in a few minutes
give you an idea of your major leakage points. Sometimes a tube
of caulking is paid for in less time than it takes to install.<br>
Bruce Easterbrook P.Eng.<br>
Abode Engineering<br>
</tt></font><br>
On 24/04/2012 01:07 PM, Nick Caton wrote:
<blockquote
cite="mid:ECDF361A89E5FA479BE7E64C658B52050CAF8FC2@SANDBINC4.sbi.smithboucher.com"
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<div class="WordSection1">
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">For
an “old townhouse,” I think you may want to reference the
ASHRAE fundamentals table for residential constructions
(Fundamentals 2001, Ch28, Table 7)… they surveyed a bunch
of homes that were up to a few decades old to come up with a
table that shows varying ACH rates, for “tight” to “loose”
construction, varying with the OADT.
<u>The tightest value given is 0.41</u>. Again this isn’t a
standard but rather based on real-world measurements.<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">A
very good (and long) discussion thread is in the
equest-users archives discussing alternate infiltration
resources as well: thread title was “Basic stuff –
Infiltration”<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">~Nick<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
id="Picture_x0020_1"
src="cid:part1.07050709.01020002@bellnet.ca"
alt="cid:489575314@22072009-0ABB" height="37" width="119"></span><b><span
style="font-size:11.0pt;font-family:"Stylus
BT","sans-serif";color:#2D4D5E"><o:p></o:p></span></b></p>
<p class="MsoNormal"><b><span
style="font-size:11.0pt;font-family:"Stylus
BT","sans-serif";color:#2D4D5E"><o:p> </o:p></span></b></p>
<p class="MsoNormal"><b><span style="font-family:"Stylus
BT","sans-serif";color:#2D4D5E">NICK CATON,
P.E.</span></b><b><span style="font-family:"Stylus
BT","sans-serif";color:#2D4D5E"><o:p></o:p></span></b></p>
<p class="MsoNormal"><span
style="font-size:7.5pt;font-family:"Calibri","sans-serif";color:#CC9900">SENIOR
ENGINEER<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:7.5pt;font-family:"Calibri","sans-serif";color:#CC9900"><o:p> </o:p></span></p>
<p class="MsoNormal"><span
style="font-size:10.0pt;font-family:"Calibri","sans-serif";color:#2D4D5E">Smith
& Boucher Engineers</span><span
style="font-size:7.5pt;color:#CC9900"><o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:10.0pt;font-family:"Calibri","sans-serif";color:#2D4D5E">25501
west valley parkway, suite 200<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:10.0pt;font-family:"Calibri","sans-serif";color:#2D4D5E">olathe,
ks 66061<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:10.0pt;font-family:"Calibri","sans-serif";color:#2D4D5E">direct
913.344.0036<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:10.0pt;font-family:"Calibri","sans-serif";color:#2D4D5E">fax
913.345.0617<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><a
moz-do-not-send="true" href="www.smithboucher.com"
title="blocked::www.smithboucher.com"><span
style="font-size:10.0pt">www.smithboucher.com</span></a></span><u><span
style="font-size:10.0pt;font-family:"Calibri","sans-serif";color:blue">
</span></u><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"><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"><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"">
<a class="moz-txt-link-abbreviated" href="mailto:equest-users-bounces@lists.onebuilding.org">equest-users-bounces@lists.onebuilding.org</a>
[<a class="moz-txt-link-freetext" href="mailto:equest-users-bounces@lists.onebuilding.org">mailto:equest-users-bounces@lists.onebuilding.org</a>]
<b>On Behalf Of </b>CleanTech Analytics<br>
<b>Sent:</b> Tuesday, April 24, 2012 2:32 AM<br>
<b>To:</b> xiaoyang shi<br>
<b>Cc:</b> <a class="moz-txt-link-abbreviated" href="mailto:equest-users@lists.onebuilding.org">equest-users@lists.onebuilding.org</a><br>
<b>Subject:</b> Re: [Equest-users] infiltration rate<o:p></o:p></span></p>
</div>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><span
style="font-family:"Verdana","sans-serif";color:#336666">.35
ACH is the BPI standard, any tighter and mechanical
ventilation is required..</span><o:p></o:p></p>
<div>
<p class="MsoNormal"><span
style="font-family:"Verdana","sans-serif";color:#336666"><br
clear="all">
</span><o:p></o:p></p>
<p class="MsoNormal"><i><span
style="font-family:"Verdana","sans-serif";color:#999999">Jeremiah
D. Crossett</span></i><o:p></o:p></p>
<p class="MsoNormal"><i><span
style="font-family:"Verdana","sans-serif";color:#999999">CleanTech
Analytics</span></i><o:p></o:p></p>
<p class="MsoNormal"><i><span
style="font-family:"Verdana","sans-serif";color:#999999">503-688-8951</span></i><o:p></o:p></p>
<div>
<p class="MsoNormal"><a moz-do-not-send="true"
href="http://www.cleantechanalytics.com" target="_blank"><i><span
style="font-family:"Verdana","sans-serif";color:#999999">www.cleantechanalytics.com</span></i></a><o:p></o:p></p>
<div>
<p class="MsoNormal" style="text-align:center"
align="center"><o:p> </o:p></p>
<p class="MsoNormal" style="text-align:center"
align="center"><img moz-do-not-send="true"
id="_x0000_i1025"
src="http://cleantechanalytics.com/images/stories/cleantech%20analytics%20120.PNG"
border="0"><o:p></o:p></p>
</div>
</div>
<div>
<div>
<p
style="margin:0in;margin-bottom:.0001pt;text-align:center"
align="center"><i><span
style="font-size:8.5pt;font-family:"Droid
Serif","serif";color:#CCCCCC;background:white">This
document may contain valuable information
proprietary to CleanTech Analytics which is private
and confidential. It may not be shared, copied,
stored or transmitted in any form without the prior
written consent of CleanTech Analytics</span></i><b><o:p></o:p></b></p>
</div>
</div>
<p class="MsoNormal"><o:p> </o:p></p>
<div>
<p class="MsoNormal" style="margin-bottom:12.0pt"><o:p> </o:p></p>
<div>
<p class="MsoNormal">On Mon, Apr 23, 2012 at 11:54 PM,
xiaoyang shi <<a moz-do-not-send="true"
href="mailto:xs2144@gmail.com" target="_blank">xs2144@gmail.com</a>>
wrote:<o:p></o:p></p>
<p class="MsoNormal">Hi guys,<o:p></o:p></p>
<div>
<p class="MsoNormal"><o:p> </o:p></p>
</div>
<div>
<p class="MsoNormal">Could I ask what is the about
infiltration rate of old townhouse in NYC? Where could
I find the standard?<o:p></o:p></p>
</div>
<div>
<p class="MsoNormal"><o:p> </o:p></p>
</div>
<div>
<p class="MsoNormal">0.2cfm/ft2? Is it correct?<o:p></o:p></p>
</div>
<div>
<p class="MsoNormal"><o:p> </o:p></p>
</div>
<div>
<p class="MsoNormal">Thanks<o:p></o:p></p>
</div>
<div>
<p class="MsoNormal"><o:p> </o:p></p>
</div>
<div>
<p class="MsoNormal">Yang<o:p></o:p></p>
</div>
<p class="MsoNormal" style="margin-bottom:12.0pt"><br>
_______________________________________________<br>
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To unsubscribe from this mailing list send a blank
message to <a moz-do-not-send="true"
href="mailto:EQUEST-USERS-UNSUBSCRIBE@ONEBUILDING.ORG">
EQUEST-USERS-UNSUBSCRIBE@ONEBUILDING.ORG</a><o:p></o:p></p>
</div>
<p class="MsoNormal"><o:p> </o:p></p>
</div>
</div>
</div>
<br>
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<pre wrap="">_______________________________________________
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