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<font size="+1">As an adder to this the wind speed also varies with
the height of the building. The wind speed for a locations
weather file is at a standard reference height and would also be
adjusted for height of the building.<br>
Bruce Easterbrook P.Eng.<br>
Abode Engineering<br>
<br>
</font>
<div class="moz-cite-prefix">On 12/09/2012 12:22 PM, Nick Caton
wrote:<br>
</div>
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<p class="MsoNormal"><span style="color:#1F497D">I can add a
probable bit of method to the madness for those concerned:<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">The reason
exterior air film is not entered as a static property, nor
reported lumped in with the constructions’ overall assembly
U-values, is because it’s actually a variable property.
<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">The reference I
have handy (Table 5-12, 2001 Fundamentals) lists multiple
resistance values for moving air (at various speeds) and
still air (for various surface orientations and directions
of heat flow).
<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">I take it as
implicit that eQuest/DOE2 models this variable contribution
from the exterior air film in consideration of the hourly
windspeed data available from the weather file, so
presenting any single value could be misleading. I’ve had
to make that clarification a few times for those
scrutinizing the construction reports without the eQuest
detailed simulation reports reference handy ;).<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">Hope that helps
a bit!<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">~Nick<o:p></o:p></span></p>
<div>
<p class="MsoNormal"><span style="color:#1F497D"><img
id="_x0000_i1029"
src="cid:part1.08040106.01090900@bellnet.ca"
alt="cid:489575314@22072009-0ABB" height="37"
width="119"></span><b><span
style="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"><o:p> </o:p></span></b></p>
<p class="MsoNormal"><b><span
style="font-size:12.0pt;font-family:"Stylus
BT","sans-serif";color:#2D4D5E">NICK
CATON, P.E.</span></b><b><span
style="font-size:12.0pt;font-family:"Stylus
BT","sans-serif";color:#2D4D5E"><o:p></o:p></span></b></p>
<p class="MsoNormal"><span
style="font-size:7.5pt;color:#CC9900">SENIOR ENGINEER<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:7.5pt;color:#CC9900"><o:p> </o:p></span></p>
<p class="MsoNormal"><span
style="font-size:10.0pt;color:#2D4D5E">Smith & Boucher
Engineers</span><span
style="font-size:7.5pt;font-family:"Times New
Roman","serif";color:#CC9900"><o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:10.0pt;color:#2D4D5E">25501 west valley
parkway, suite 200<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:10.0pt;color:#2D4D5E">olathe, ks 66061<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:10.0pt;color:#2D4D5E">direct 913.344.0036<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:10.0pt;color:#2D4D5E">fax 913.345.0617<o:p></o:p></span></p>
<p class="MsoNormal"><span style="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;color:blue">
</span></u><span style="color:#1F497D"><o:p></o:p></span></p>
</div>
<p class="MsoNormal"><span style="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"><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>Dahlstrom, Aaron<br>
<b>Sent:</b> Monday, September 10, 2012 4:20 PM<br>
<b>To:</b> Peter Hillermann;
<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] Building Walls<o:p></o:p></span></p>
</div>
</div>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><span style="font-size:12.0pt">Peter – <o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt">We’ve
noticed the identical issue. Another way of stating it - the
sequence of layers input for the baseline and the proposed
should EXCLUDE contributions from air film. eQUEST adds the
interior air film as a separate entry under the Layers tab.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal"><img id="_x0000_i1025"
src="cid:part3.06090404.07020903@bellnet.ca" border="0"
height="328" width="459"><span style="font-size:12.0pt"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt">ASHRAE’s
regulations for baseline constructions include the
contribution of the exterior air film at a specified
windspeed. As far as I can tell, this is how the u-value
displayed on the LV-D report is calculated. (Report says
“includes exterior air film”).<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt">However, we
have noticed that the value displayed inside eQUEST as
“calculated u-value” does not match the u-value from the
LV-D. My theory is that the item shown in eQUEST includes
the interior air film but not the exterior air film. (From
Vol 2 dictionary, under CONSTRUCTION:U-VALUE - “For exterior
surfaces, equals the overall conductance of the surface
including the inside air film but excluding the outside air
film.”)<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal"><img id="_x0000_i1026"
src="cid:part4.09070905.00060408@bellnet.ca" border="0"
height="341" width="475"><span style="font-size:12.0pt"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt">I’m just
learning about this issue, so any wisdom from more
experienced folks would be welcome!<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt">Aaron<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt"><o:p> </o:p></span></p>
<div>
<p class="MsoNormal"
style="line-height:150%;text-autospace:none"><b><span
style="font-size:9.0pt;line-height:150%;font-family:"Verdana","sans-serif";color:gray">Aaron
Dahlstrom , PE, LEED® AP</span></b><o:p></o:p></p>
<p class="MsoNormal"
style="line-height:150%;text-autospace:none"><b><span
style="font-family:"AvantGarde Bk
BT";color:#17365D">In P</span></b><b><span
style="font-family:"AvantGarde Bk
BT";color:#619428">o</span></b><b><span
style="font-family:"AvantGarde Bk
BT";color:#17365D">sse</span></b><span
style="font-size:9.0pt;line-height:150%;font-family:"Verdana","sans-serif";color:gray">
– </span><span
style="font-size:8.0pt;line-height:150%;font-family:"Verdana","sans-serif";color:gray">A
subsidiary of</span><span
style="font-size:9.0pt;line-height:150%;font-family:"Verdana","sans-serif";color:gray"></span><b><span
style="font-size:9.0pt;line-height:150%;font-family:"Verdana","sans-serif";color:#CC0000">AKF</span></b><span
style="font-size:9.0pt;line-height:150%;font-family:"Verdana","sans-serif";color:gray">|
1500 Walnut Street, Suite 1414, Philadelphia, PA 19102 </span><o:p></o:p></p>
<p class="MsoNormal"
style="line-height:150%;text-autospace:none"><span
style="font-size:9.0pt;line-height:150%;font-family:"Verdana","sans-serif";color:gray">d:
215-282-6753| m: | In Posse: 215-282-6800| AKF:
215-735-7290</span><o:p></o:p></p>
<p class="MsoNormal" style="text-autospace:none"><span
style="font-size:9.0pt;font-family:"Verdana","sans-serif";color:gray">e:
<a moz-do-not-send="true"
href="mailto:ADahlstrom@in-posse.com">ADahlstrom@in-posse.com</a>
| in posse web:
<a moz-do-not-send="true" href="http://www.in-posse.com/">www.in-posse.com</a>
| akf web: <a moz-do-not-send="true"
href="http://www.akfgroup.com/">
www.akfgroup.com</a></span><o:p></o:p></p>
<p class="MsoNormal" style="text-autospace:none"><span
style="font-size:9.0pt;font-family:"Verdana","sans-serif";color:gray"> </span><o:p></o:p></p>
<p class="MsoNormal" style="text-autospace:none"><span
style="font-size:9.0pt;font-family:"Verdana","sans-serif";color:gray"> </span><o:p></o:p></p>
</div>
<p class="MsoNormal"><span
style="font-size:9.0pt;font-family:"Times New
Roman","serif";color:gray"> </span><span
style="font-size:12.0pt"><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"><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 moz-do-not-send="true"
href="mailto:equest-users-bounces@lists.onebuilding.org">equest-users-bounces@lists.onebuilding.org</a>
[<a moz-do-not-send="true"
href="mailto:equest-users-bounces@lists.onebuilding.org">mailto:equest-users-bounces@lists.onebuilding.org</a>]
<b>On Behalf Of </b>Peter Hillermann<br>
<b>Sent:</b> Monday, September 10, 2012 2:02 PM<br>
<b>To:</b> <a moz-do-not-send="true"
href="mailto:equest-users@lists.onebuilding.org">equest-users@lists.onebuilding.org</a><br>
<b>Subject:</b> [Equest-users] Building Walls<o:p></o:p></span></p>
</div>
</div>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">To All:<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">A general piece of information I got from
our engineer when we had done the energy model for LEED and
something to look out for. He let me know that in the baseline
for wall construction to make sure you add in the air film
(inside and out) otherwise LEED has an issue with your
submission.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Our exact comment was this:<o:p></o:p></p>
<p class="MsoNormal" style="text-autospace:none"><span
style="font-size:9.0pt;font-family:"Arial","sans-serif"">The
Baseline Case roof and exterior wall U-values reported in
Table 1.4.1A (U-0.048 and U-0.065, respectively) are<o:p></o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span
style="font-size:9.0pt;font-family:"Arial","sans-serif"">inconsistent
with the U-values reported in the LV-D report (U-0.054 and
U-0.063, respectively). Please ensure consistency<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:9.0pt;font-family:"Arial","sans-serif"">across
construction drawings, software summaries, and the EAp2
Template.<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:9.0pt;font-family:"Arial","sans-serif""><o:p> </o:p></span></p>
<p class="MsoNormal">Hope it helps.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">I also don’t know if anyone has this
summarized, because I used the baseline walls from this forum
that someone had posted and that was the response.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">PS: Thank you to this forum, we ended up
getting LEED Certified.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Thanks,<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><b><span
style="font-size:10.0pt;font-family:"ITC Avant Garde
Std Bk";color:#1F497D;letter-spacing:1.0pt" lang="DE">PETER
HILLERMANN<o:p></o:p></span></b></p>
<p class="MsoNormal"><span
style="font-size:10.0pt;font-family:"ITC Avant Garde
Std Bk";color:#1F497D;letter-spacing:1.0pt" lang="DE"><o:p> </o:p></span></p>
<p class="MsoNormal"><span
style="font-size:8.0pt;font-family:"ITC Avant Garde
Gothic Demi";color:#1F497D;letter-spacing:1.0pt"
lang="DE"><a moz-do-not-send="true"
href="mailto:peterh@westallarchitects.com">peterh@westallarchitects.com</a><o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:10.0pt;font-family:"ITC Avant Garde
Std Bk";color:#1F497D;letter-spacing:1.0pt" lang="DE"><o:p> </o:p></span></p>
<p class="MsoNormal" style="line-height:75%"><b><span
style="font-size:14.0pt;line-height:75%;font-family:"ITC
Avant Garde Std
Md";color:#1F497D;letter-spacing:1.0pt" lang="DE">westall</span></b><span
style="font-size:14.0pt;line-height:75%;font-family:"Times
New
Roman","serif";color:#1F497D;letter-spacing:1.0pt"
lang="DE"><o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:4.0pt;line-height:75%"><b><span
style="font-size:14.0pt;line-height:75%;font-family:"ITC
Avant Garde Std
Md";color:#1F497D;letter-spacing:1.0pt">architects</span></b><span
style="font-size:14.0pt;line-height:75%;color:#1F497D;letter-spacing:1.0pt"><o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:10.0pt;font-family:"ITC Avant Garde
Std Bk";color:#1F497D;letter-spacing:1.0pt">3404 pierce
drive<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:10.0pt;font-family:"ITC Avant Garde
Std Bk";color:#1F497D;letter-spacing:1.0pt">chamblee,
georgia 30341<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:8.0pt;font-family:"ITC Avant Garde Std
Bk";color:#1F497D;letter-spacing:1.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal"><span
style="font-size:8.0pt;font-family:"ITC Avant Garde Std
Bk";color:#1F497D;letter-spacing:1.0pt">o 770.458.4113<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:8.0pt;font-family:"ITC Avant Garde Std
Bk";color:#1F497D;letter-spacing:1.0pt">c 678.898.2936<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:8.0pt;font-family:"ITC Avant Garde Std
Bk";color:#1F497D;letter-spacing:1.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal"><span
style="font-size:8.0pt;font-family:"ITC Avant Garde
Gothic Demi";color:#1F497D;letter-spacing:1.0pt">westallarchitects.com</span><span
style="font-size:12.0pt;font-family:"Times New
Roman","serif";color:#1F497D;letter-spacing:1.0pt"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><img
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