Wow! It seems like 1 cfm/sf for infiltration would be a lot. The people's hair next to the windows would be blowing all around! That's the average number I use for HVAC ventilation.<br><br>Carol<br><br><div class="gmail_quote">
On Wed, Sep 15, 2010 at 2:36 PM, Alex Krickx <span dir="ltr"><<a href="mailto:akrickx@seriousmaterials.com">akrickx@seriousmaterials.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin: 0pt 0pt 0pt 0.8ex; border-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;">
<div link="blue" vlink="purple" lang="EN-US">
<div>
<p class="MsoNormal"><span style="font-size: 11pt; color: rgb(31, 73, 125);">Hi Yingqi,</span></p>
<p class="MsoNormal"><span style="font-size: 11pt; color: rgb(31, 73, 125);"> </span></p>
<p class="MsoNormal"><span style="font-size: 11pt; color: rgb(31, 73, 125);">I’m pretty sure eQUEST does not automatically adjust infiltration
rates. </span></p>
<p class="MsoNormal"><span style="font-size: 11pt; color: rgb(31, 73, 125);"> </span></p>
<p class="MsoNormal"><span style="font-size: 11pt; color: rgb(31, 73, 125);">If you search through the archives and look up “infiltration
windows” you can find some relevant posts. I’ve attached one email
that was sent around earlier this year describing one way to change the infiltration
between current and proposed cases.</span></p>
<p class="MsoNormal"><span style="font-size: 11pt; color: rgb(31, 73, 125);"> </span></p>
<p class="MsoNormal"><span style="font-size: 11pt; color: rgb(31, 73, 125);">I don’t think you can apply a percentage reduction without
some more information. I believe that the requirement to meet the DOE’s
VPP for windows is a maximum infiltration of 0.3 CFM/SF – this leads me
to believe that some new windows have more infiltration than this. My company
manufacturers windows with infiltrations as low as 0.01 CFM/SF. I’m
having a hard time finding a source, but I’m pretty sure I’ve heard
of modeling existing windows with infiltration as high as 1 CFM/SF. A building
with a large WWR and very leaky windows could substantially reduce whole-building
infiltration values.</span></p>
<p class="MsoNormal"><span style="font-size: 11pt; color: rgb(31, 73, 125);"> </span></p>
<p class="MsoNormal"><span style="font-size: 11pt; color: rgb(31, 73, 125);">Good luck!</span></p>
<p class="MsoNormal"><span style="font-size: 11pt; color: rgb(31, 73, 125);">Alex Krickx</span></p>
<p class="MsoNormal"><span style="font-size: 11pt; color: rgb(31, 73, 125);"> </span></p>
<p class="MsoNormal"><span style="font-size: 11pt; color: rgb(31, 73, 125);"> </span></p>
<p class="MsoNormal"><span style="color: rgb(38, 47, 19);">Alex
Krickx</span></p>
<p class="MsoNormal"><span style="font-size: 9pt; color: gray;">Building Energy Specialist</span></p>
<p class="MsoNormal"><span style="font-size: 8pt; color: rgb(31, 73, 125);"><img src="cid:image001.jpg@01CB54E3.594C67C0" alt="email_sig" height="42" width="121"></span><span style="font-size: 11pt; color: rgb(31, 73, 125);"></span></p>
<p class="MsoNormal"><span style="font-size: 9pt; color: rgb(31, 73, 125);">1250 Elko Dr, Sunnyvale, CA 94089</span></p>
<p class="MsoNormal"><span style="font-size: 9pt; color: rgb(31, 73, 125);">(t) 408.541.8124</span></p>
<p class="MsoNormal"><span style="font-size: 9pt; color: gray;"> </span></p>
<p class="MsoNormal"><b><i><span style="font-size: 7.5pt; color: rgb(31, 73, 125);">Warning:</span></i></b><i><span style="font-size: 7.5pt; color: rgb(31, 73, 125);"> The information contained
in this e-mail may be privileged attorney-client communications or attorney
work product and/or proprietary and confidential. If the reader of this
message is not the intended recipient then you have received it in error and any
review, distribution or copying of this message is prohibited and you are to
notify us immediately by reply e-mail and delete the original message
immediately.</span></i><span style="font-size: 11pt; color: rgb(31, 73, 125);"></span></p>
<p class="MsoNormal"><span style="font-size: 11pt; color: rgb(31, 73, 125);"> </span></p>
<p class="MsoNormal"><span style="font-size: 11pt; color: rgb(31, 73, 125);"> </span></p>
<p class="MsoNormal"><span style="font-size: 11pt; color: rgb(31, 73, 125);"> </span></p>
<div style="border-width: 1pt medium medium; border-style: solid none none; border-color: rgb(181, 196, 223) -moz-use-text-color -moz-use-text-color; padding: 3pt 0in 0in;">
<p class="MsoNormal"><b><span style="font-size: 10pt;">From:</span></b><span style="font-size: 10pt;"> <a href="mailto:equest-users-bounces@lists.onebuilding.org" target="_blank">equest-users-bounces@lists.onebuilding.org</a>
[mailto:<a href="mailto:equest-users-bounces@lists.onebuilding.org" target="_blank">equest-users-bounces@lists.onebuilding.org</a>] <b>On Behalf Of </b>Carol
Gardner<br>
<b>Sent:</b> Wednesday, September 15, 2010 2:19 PM<br>
<b>To:</b> YingQi Chen<br>
<b>Cc:</b> <a href="mailto:equest-users@lists.onebuilding.org" target="_blank">equest-users@lists.onebuilding.org</a><br>
<b>Subject:</b> Re: [Equest-users] Window replacement and infiltration rate
changing</span></p>
</div><div><div></div><div class="h5">
<p class="MsoNormal"> </p>
<p class="MsoNormal" style="margin-bottom: 12pt;">If eQUEST changed the
infiltration between the two cases you would be able to see the change in your
.inp deck. I'm not sure what the impact of doing the change using the EEM
Wizard vs. simply copying and renaming your input deck and making the change in
it's own .inp deck would be. You could experiment and see if there's a
difference. If it doesn't change your infiltration I would lower the perimeter
infiltration rate conservatively by a fixed percent. You might Google
infiltration rates on line and find some information related to how much to
expect for a single pane window to a double pane window. Also, be sure to
account for your frames, too. Are they thermally broken? Does the frame
material change, etc.<br>
<br>
Carol</p>
<div>
<p class="MsoNormal">On Wed, Sep 15, 2010 at 2:05 PM, YingQi Chen <<a href="mailto:yingqi.chen@pertan.com" target="_blank">yingqi.chen@pertan.com</a>> wrote:</p>
<div>
<div>
<div>
<p class="MsoNormal">Dear
eQuester:</p>
<p class="MsoNormal"> </p>
<p class="MsoNormal">I
want to run a simulation by EEM wizard. I want to replace exiting single pane,
clear windows with double pane clear windows for a school building. </p>
<p class="MsoNormal"> </p>
<p class="MsoNormal">I
changed the class type form single pane clear to double pane clear windows.
The energy saving doesn’t look good. I have two following
questions need someone's guidance. </p>
<p class="MsoNormal"> </p>
<p class="MsoNormal"><b>Question
1:</b></p>
<p class="MsoNormal"> </p>
<p class="MsoNormal">My
question is that this EEM will reduce perimeter infiltration rate of the
building. I am not quit sure if I need to reduce the perimeter infiltration
rate in the simulation. If, it does, how many percentage of infiltration rate
do I need to reduce? </p>
<p class="MsoNormal"> </p>
<p class="MsoNormal"><b>Question
2:</b></p>
<p class="MsoNormal"> </p>
<p class="MsoNormal">Does
eQuest programmer has already considered this issue and changed the perimeter
infiltration rate automatically with changing window glass type and insulation
of the windows?</p>
<p class="MsoNormal"> </p>
<p class="MsoNormal">Yingqi
Chen</p>
<p class="MsoNormal"> </p>
<p class="MsoNormal">The
PERTAN Group<br>
44 Main Street, Suite </p>
<p class="MsoNormal">Champaign,
IL 61820</p>
<p class="MsoNormal"> </p>
<p class="MsoNormal">217-356-1348
ext 205</p>
</div>
</div>
</div>
<p class="MsoNormal" style="margin-bottom: 12pt;"><br>
_______________________________________________<br>
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</div>
<p class="MsoNormal"><br>
<br clear="all">
<br>
-- <br>
Carol Gardner PE</p>
</div></div></div>
</div>
<br><br>---------- Forwarded message ----------<br>From: Nick Caton <<a href="mailto:ncaton@smithboucher.com">ncaton@smithboucher.com</a>><br>To: Alex Krickx <<a href="mailto:akrickx@seriousmaterials.com">akrickx@seriousmaterials.com</a>>, "<a href="mailto:equest-users@lists.onebuilding.org">equest-users@lists.onebuilding.org</a>" <<a href="mailto:equest-users@lists.onebuilding.org">equest-users@lists.onebuilding.org</a>><br>
Date: Mon, 8 Mar 2010 16:47:48 -0800<br>Subject: RE: [Equest-users] Modeling Infiltration and Windows<br>
<div link="blue" vlink="purple" lang="EN-US">
<div>
<p class="MsoNormal"><span style="color: rgb(31, 73, 125);">I’ve done exactly that in the past for the exactly the same purpose!</span></p>
<p class="MsoNormal"><span style="color: rgb(31, 73, 125);"> </span></p>
<p class="MsoNormal"><span style="color: rgb(31, 73, 125);">The only difference is I believe I always punch in the differences in the metric of ACH. ASHRAE fundamentals provides some guidance regarding air change rates to expect for various classes of construction as
a function of outdoor design temperature, and that was the best I could base my existing construction off of from what info I had available.</span></p>
<p class="MsoNormal"><span style="color: rgb(31, 73, 125);"> </span></p>
<p class="MsoNormal"><span style="color: rgb(31, 73, 125);">Come up with a “leakiness” for both you construction, old and new windows, and do the weighted average jig =).</span></p>
<p class="MsoNormal"><span style="color: rgb(31, 73, 125);"> </span></p>
<p class="MsoNormal"><span style="color: rgb(31, 73, 125);">Kudos on your fancy facade spelling also ;)!
</span></p>
<p class="MsoNormal"><span style="color: rgb(31, 73, 125);"> </span></p>
<p class="MsoNormal"><span style="color: rgb(31, 73, 125);">~Nick</span></p>
<div>
<p class="MsoNormal"><span style="color: rgb(31, 73, 125);"><img src="cid:image002.jpg@01CABEEF.94CAF2B0" alt="cid:489575314@22072009-0ABB" height="37" width="119"></span><b><span style="color: rgb(45, 77, 94);"></span></b></p>
<p class="MsoNormal"><b><span style="color: rgb(45, 77, 94);"> </span></b></p>
<p class="MsoNormal"><b><span style="color: rgb(45, 77, 94);">NICK CATON, E.I.T.</span></b><b><span style="font-size: 12pt; color: rgb(45, 77, 94);"></span></b></p>
<p class="MsoNormal"><span style="font-size: 7.5pt; color: rgb(204, 153, 0);">PROJECT ENGINEER</span><span style="font-size: 7.5pt; font-family: "Times New Roman","serif"; color: rgb(204, 153, 0);"></span></p>
<p class="MsoNormal"><span style="font-size: 10pt; color: rgb(45, 77, 94);">25501 west valley parkway</span></p>
<p class="MsoNormal"><span style="font-size: 10pt; color: rgb(45, 77, 94);">olathe ks 66061</span></p>
<p class="MsoNormal"><span style="font-size: 10pt; color: rgb(45, 77, 94);">direct 913 344.0036</span></p>
<p class="MsoNormal"><span style="font-size: 10pt; color: rgb(45, 77, 94);">fax 913 345.0617</span></p>
<p class="MsoNormal"><i><span style="font-size: 10pt; color: rgb(45, 77, 94);">Check out our new web-site @
</span></i><span style="color: rgb(31, 73, 125);"><a href="http://www.smithboucher.com" title="blocked::www.smithboucher.com" target="_blank"><span style="font-size: 10pt;">www.smithboucher.com</span></a></span><u><span style="font-size: 10pt; color: blue;">
</span></u><span style="color: rgb(31, 73, 125);"></span></p>
</div>
<p class="MsoNormal"><span style="color: rgb(31, 73, 125);"> </span></p>
<div>
<div style="border-width: 1pt medium medium; border-style: solid none none; border-color: rgb(181, 196, 223) -moz-use-text-color -moz-use-text-color; padding: 3pt 0in 0in;">
<p class="MsoNormal"><b><span style="font-size: 10pt;">From:</span></b><span style="font-size: 10pt;"> <a href="mailto:equest-users-bounces@lists.onebuilding.org" target="_blank">equest-users-bounces@lists.onebuilding.org</a> [mailto:<a href="mailto:equest-users-bounces@lists.onebuilding.org" target="_blank">equest-users-bounces@lists.onebuilding.org</a>]
<b>On Behalf Of </b>Alex Krickx<br>
<b>Sent:</b> Monday, March 08, 2010 6:05 PM<br>
<b>To:</b> <a href="mailto:equest-users@lists.onebuilding.org" target="_blank">equest-users@lists.onebuilding.org</a><br>
<b>Subject:</b> [Equest-users] Modeling Infiltration and Windows</span></p>
</div>
</div>
<p class="MsoNormal"> </p>
<p class="MsoNormal">Hello all,</p>
<p class="MsoNormal"> </p>
<p class="MsoNormal">I am interested in modeling the energy savings that occurs when windows are replaced with lower-infiltration alternatives. In the wizard mode, the only place that I see infiltration is under the “Building Envelope Constructions” Screen.
</p>
<p class="MsoNormal"> </p>
<p class="MsoNormal">I’m hoping someone can confirm my methodology:</p>
<p class="MsoNormal"> </p>
<p class="MsoNormal">Can I input a weighted average of window and wall air infiltration here? If I’m looking at a building with 20% Window to Wall Ratio, and the windows have 0.1 CFM/ft² while the walls have 0.04 CFM/ft²can I apply an area weighted average
into this box? I would take (20%*0.1+80%*0.04) as the <i>façade </i>infiltration value.</p>
<p class="MsoNormal"> </p>
<p class="MsoNormal">That way I could use the same formula to determine the area weighted infiltration of the façade if better windows were installed.</p>
<p class="MsoNormal"> </p>
<p class="MsoNormal">How do other people model this?</p>
<p class="MsoNormal"> </p>
<p class="MsoNormal">Thanks in advance!</p>
<p class="MsoNormal"> </p>
<p class="MsoNormal">Alex Krickx</p>
<p class="MsoNormal"> </p>
<p class="MsoNormal"> </p>
<p class="MsoNormal"><span style="font-size: 12pt; color: rgb(38, 47, 19);">Alex Krickx</span></p>
<p class="MsoNormal"><span style="font-size: 9pt; color: gray;">Building Energy Specialist</span></p>
<p class="MsoNormal"><span style="font-size: 8pt; color: rgb(31, 73, 125);"><img src="cid:image003.jpg@01CABEEF.94CAF2B0" alt="email_sig" border="0" height="42" width="121"></span></p>
<p class="MsoNormal"><span style="font-size: 9pt;">1250 Elko Dr, Sunnyvale, CA 94089</span></p>
<p class="MsoNormal"><span style="font-size: 9pt;">(t) 408.541.8124</span></p>
<p class="MsoNormal"><span style="font-size: 9pt; color: gray;"> </span></p>
<p class="MsoNormal"><b><i><span style="font-size: 7.5pt;">Warning:</span></i></b><i><span style="font-size: 7.5pt;"> The information contained in this e-mail may be privileged attorney-client communications
or attorney work product and/or proprietary and confidential. If the reader of this message is not the intended recipient then you have received it in error and any review, distribution or copying of this message is prohibited and you are to notify us immediately
by reply e-mail and delete the original message immediately.</span></i></p>
<p class="MsoNormal"> </p>
<p class="MsoNormal"> </p>
</div>
</div>
<br></blockquote></div><br><br clear="all"><br>-- <br>Carol Gardner PE<br>
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