<html><body><div style="color:#000; background-color:#fff; font-family:arial, helvetica, sans-serif;font-size:10pt"><div><span>The values listed in Appendix A8.2 are for the fenestration opening. Looking at the definition of fenestration it says "all areas (including the frames) in the building envelope that let in light, including windows"</span></div><div><span>If the u-values listed includes the frame and I am assuming edge of glass effects, it seems to me that the frame width in eQuest should be zero, or you would be including the frame twice.</span></div><div><br><span></span></div><div><span>Am I not understanding this correctly? Thanks.</span></div><div><br><span></span></div><div><span>Brad Robinson<br></span></div><div><br></div><div style="font-family: arial, helvetica, sans-serif; font-size: 10pt;"><div style="font-family: times new roman, new york, times, serif; font-size: 12pt;"><font face="Arial" size="2"><hr
size="1"><b><span style="font-weight:bold;">From:</span></b> Robby Oylear <robbyoylear@gmail.com><br><b><span style="font-weight: bold;">To:</span></b> Omar Katanani <omar@ecoconsulting.net><br><b><span style="font-weight: bold;">Cc:</span></b> equest-users@lists.onebuilding.org<br><b><span style="font-weight: bold;">Sent:</span></b> Friday, July 29, 2011 11:16:36 AM<br><b><span style="font-weight: bold;">Subject:</span></b> Re: [Equest-users] URGENT: Window U-values: Total window assembly v/s Glass only<br></font><br><div id="yiv1173912860">Omar,<div><br></div><div>If I was the reviewer in this case I'd have trouble understanding how eQUEST is accounting for frame effects when you've set the frame width to zero. Honestly, I think the only acceptable values you should be using are from the table in Appendix A if you don't have an equivalent nationally recognized certification program. </div>
<div><br></div><div>Also, your SHGC looks really low compared to your visible transmittance. Unless you're using some pretty impressive glazing or low-e coatings I'd expect the VT to be around 0.5-ish for a glazing assembly with an SHGC of 0.29.</div>
<div><br></div><div><div class="yiv1173912860MsoNormal" style="margin-top:1.0pt;"><a rel="nofollow" name="_MailAutoSig"><b><span style="font-size:10.0pt;
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<div class="yiv1173912860MsoNormal" style="line-height:115%;"><span style=""></span><a rel="nofollow" target="_blank" href="http://www.rushingco.com/"><span style=""><b><i><span style="font-size:8.0pt;line-height:115%;
color:#632423;">www.rushingco.com</span></i></b></span><span style=""></span></a><span style=""><span style="font-size:7.0pt;line-height:115%;color:#1F497D;"></span></span></div><br><div class="yiv1173912860gmail_quote">On Fri, Jul 29, 2011 at 6:55 AM, Omar Katanani <span dir="ltr"><<a rel="nofollow" ymailto="mailto:omar@ecoconsulting.net" target="_blank" href="mailto:omar@ecoconsulting.net">omar@ecoconsulting.net</a>></span> wrote:<br>
<blockquote class="yiv1173912860gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">
<div lang="EN-GB">
<div>
<div class="yiv1173912860MsoNormal"><font color="navy" face="Arial" size="2"><span style="font-size:10.0pt;font-family:Arial;color:navy;">Thanks Bruce,</span></font></div>
<div class="yiv1173912860MsoNormal"><font color="navy" face="Arial" size="2"><span style="font-size:10.0pt;font-family:Arial;color:navy;"> </span></font></div>
<div class="yiv1173912860MsoNormal"><font color="navy" face="Arial" size="2"><span style="font-size:10.0pt;font-family:Arial;color:navy;">I have an additional question:</span></font></div>
<div class="yiv1173912860MsoNormal"><font color="navy" face="Arial" size="2"><span style="font-size:10.0pt;font-family:Arial;color:navy;"> </span></font></div>
<div class="yiv1173912860MsoNormal" style="margin-left:36.0pt;"><font color="navy" face="Wingdings" size="2"><span style="font-size:10.0pt;font-family:Wingdings;color:navy;">Ø<font face="Times New Roman" size="1"><span style="font:7.0pt;">
</span></font></span></font><font color="navy" face="Arial" size="2"><span style="font-size:10.0pt;font-family:Arial;color:navy;">In the “Glass
prop.jpg” file attached, I entered the glass conductance as 0.6 Btu/h-ft2-F</span></font></div>
<div class="yiv1173912860MsoNormal" style="margin-left:36.0pt;"><font color="navy" face="Wingdings" size="2"><span style="font-size:10.0pt;font-family:Wingdings;color:navy;">Ø<font face="Times New Roman" size="1"><span style="font:7.0pt;">
</span></font></span></font><font color="navy" face="Arial" size="2"><span style="font-size:10.0pt;font-family:Arial;color:navy;">In the “Window
specs.jpg” file, I entered the frame width as zero.</span></font></div>
<div class="yiv1173912860MsoNormal" style="margin-left:36.0pt;"><font color="navy" face="Wingdings" size="2"><span style="font-size:10.0pt;font-family:Wingdings;color:navy;">Ø<font face="Times New Roman" size="1"><span style="font:7.0pt;">
</span></font></span></font><font color="navy" face="Arial" size="2"><span style="font-size:10.0pt;font-family:Arial;color:navy;">However, when I look at
my LV-D report, I notice that the Average U-value for the windows is 0.509 Btu/h-ft2-F</span></font></div>
<div class="yiv1173912860MsoNormal"><font color="navy" face="Arial" size="2"><span style="font-size:10.0pt;font-family:Arial;color:navy;"> </span></font></div>
<div class="yiv1173912860MsoNormal"><font color="navy" face="Arial" size="2"><span style="font-size:10.0pt;font-family:Arial;color:navy;">Why is this number different from the
glass conductance, given that I am assuming the frame width zero (i.e, the window
is only composed of glass)?</span></font></div>
<div class="yiv1173912860MsoNormal"><font color="navy" face="Arial" size="2"><span style="font-size:10.0pt;font-family:Arial;color:navy;"> </span></font></div>
<div class="yiv1173912860MsoNormal"><font color="navy" face="Arial" size="2"><span style="font-size:10.0pt;font-family:Arial;color:navy;">I need to figure this out in order to
argue with the LEED Reviewer that eQUEST has the ability to capture frame effects.</span></font></div>
<div class="yiv1173912860MsoNormal"><font color="navy" face="Arial" size="2"><span style="font-size:10.0pt;font-family:Arial;color:navy;"> </span></font></div>
<div class="yiv1173912860MsoNormal"><font color="navy" face="Arial" size="2"><span style="font-size:10.0pt;font-family:Arial;color:navy;">Many thanks,</span></font></div>
<div><div class="yiv1173912860im">
<div class="yiv1173912860MsoNormal"><font color="navy" face="Arial" size="2"><span style="font-size:10.0pt;font-family:Arial;color:navy;">Omar</span></font></div>
<div class="yiv1173912860MsoNormal"><font color="navy" face="Arial" size="2"><span style="font-size:10.0pt;font-family:Arial;color:navy;">___________________________</span></font> </div>
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<div class="yiv1173912860MsoNormal"><b><font color="black" face="Tahoma" size="2"><span style="font-size:10.0pt;font-family:Tahoma;color:windowtext;font-weight:bold;" lang="EN-US">From:</span></font></b><font color="black" face="Tahoma" size="2"><span style="font-size:10.0pt;font-family:Tahoma;color:windowtext;" lang="EN-US"> Bruce Easterbrook [mailto:<a rel="nofollow" ymailto="mailto:bruce5@bellnet.ca" target="_blank" href="mailto:bruce5@bellnet.ca">bruce5@bellnet.ca</a>]
<br>
<b><span style="font-weight:bold;">Sent:</span></b> 28 July 2011 19:36<br>
<b><span style="font-weight:bold;">To:</span></b> Omar Katanani</span></font></div><div class="yiv1173912860im"><font color="black" face="Tahoma" size="2"><br>
<b><span style="font-weight:bold;">Subject:</span></b> Re: [Equest-users]
URGENT: Window U-values: Total window assembly v/s Glass only</font></div>
</div>
<div class="yiv1173912860MsoNormal"><font color="black" face="Times New Roman" size="3"><span style="font-size:12.0pt;"> </span></font></div>
<div class="yiv1173912860MsoNormal"><font color="black" face="Times New Roman" size="4"><span style="font-size:13.5pt;">I would try showing the frame effects are accounted
for. I checked my ASHRAE Fundamentals text and the SHGC numbers seem
close for 6mm glass double glazed with an aluminum frame in Table A8.2.
This is a complicated area and I don't get this deep into it. This also
seems to be a LEED US wrinkle from the question. The reference to
referencing A8.2 would only apply to the base case anyway not to your proposed
glass. So it would seem to me you show eQuest does account for the
frames, which it does and that your proposed glass values are reasonable or you
look at NFRC and pick a manufacturer making a window close to what you are
proposing. I think the biggest problem is the reviewer is not very
experienced and is just giving you a stock reply.<br>
Bruce<br>
</span></font></div><div><div></div><div class="yiv1173912860h5"><br>
On 28/07/2011 11:01 AM, Omar Katanani wrote: </div></div><div><div></div><div class="yiv1173912860h5">
<div class="yiv1173912860MsoNormal"><font color="navy" face="Arial" size="2"><span style="font-size:10.0pt;font-family:Arial;color:navy;">Hi Bruce,</span></font></div>
<div class="yiv1173912860MsoNormal"><font color="navy" face="Arial" size="2"><span style="font-size:10.0pt;font-family:Arial;color:navy;"> </span></font></div>
<div class="yiv1173912860MsoNormal"><font color="navy" face="Arial" size="2"><span style="font-size:10.0pt;font-family:Arial;color:navy;">The project is in Lebanon, and there are pretty much no standards relating to energy whatsoever!</span></font></div>
<div class="yiv1173912860MsoNormal"><font color="navy" face="Arial" size="2"><span style="font-size:10.0pt;font-family:Arial;color:navy;"> </span></font></div>
<div class="yiv1173912860MsoNormal"><font color="navy" face="Arial" size="2"><span style="font-size:10.0pt;font-family:Arial;color:navy;">The LEED Review I got is the following:</span></font></div>
<div class="yiv1173912860MsoNormal"><font color="navy" face="Arial" size="2"><span style="font-size:10.0pt;font-family:Arial;color:navy;"> </span></font></div>
<div class="yiv1173912860MsoNormal" style="margin-left:36.0pt;"><i><font color="navy" face="Arial" size="2"><span style="font-size:10.0pt;font-family:Arial;color:navy;font-style:italic;">“It is It is unclear whether the window
U-value of 0.26 and SHGC of 0.28 used for the Proposed case accounts for the
impact of the window frames on the whole assembly as required by ASHRAE
modeling protocol. Please provide additional information to confirm that the
framed assembly U-value was used for the Proposed case windows (e.g. showing
that the whole window assembly has been tested by NFRC, or verifying that LBNL
Window5 calculations have been provided for the whole assembly, or <u>verifying
that the frame effects are captured within the energy modeling software</u>),
or revise the model referencing ASHRAE 90.1-2007 Table A8.2 if needed.”</span></font></i></div>
<div class="yiv1173912860MsoNormal"><font color="navy" face="Arial" size="2"><span style="font-size:10.0pt;font-family:Arial;color:navy;"> </span></font></div>
<div class="yiv1173912860MsoNormal"><font color="navy" face="Arial" size="2"><span style="font-size:10.0pt;font-family:Arial;color:navy;">Can we argue that the frame effects are
captured within eQUEST, as per the underlined phrase?</span></font></div>
<div class="yiv1173912860MsoNormal"><font color="navy" face="Arial" size="2"><span style="font-size:10.0pt;font-family:Arial;color:navy;"> </span></font></div>
<div class="yiv1173912860MsoNormal"><font color="navy" face="Arial" size="2"><span style="font-size:10.0pt;font-family:Arial;color:navy;">Do you recommend using table A8.2, or are
its U-values too high?</span></font></div>
<div class="yiv1173912860MsoNormal"><font color="navy" face="Arial" size="2"><span style="font-size:10.0pt;font-family:Arial;color:navy;"> </span></font></div>
<div class="yiv1173912860MsoNormal"><font color="navy" face="Arial" size="2"><span style="font-size:10.0pt;font-family:Arial;color:navy;">Best regards,</span></font></div>
<div>
<div class="yiv1173912860MsoNormal"><font color="navy" face="Arial" size="2"><span style="font-size:10.0pt;font-family:Arial;color:navy;">Omar</span></font></div>
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<div class="yiv1173912860MsoNormal"><b><font color="black" face="Tahoma" size="2"><span style="font-size:10.0pt;font-family:Tahoma;color:windowtext;font-weight:bold;" lang="EN-US">From:</span></font></b><font color="black" face="Tahoma" size="2"><span style="font-size:10.0pt;font-family:Tahoma;color:windowtext;" lang="EN-US"> Bruce Easterbrook [<a rel="nofollow" ymailto="mailto:bruce5@bellnet.ca" target="_blank" href="mailto:bruce5@bellnet.ca">mailto:bruce5@bellnet.ca</a>] <br>
<b><span style="font-weight:bold;">Sent:</span></b> 28 July 2011 17:36<br>
<b><span style="font-weight:bold;">To:</span></b> Omar Katanani<br>
<b><span style="font-weight:bold;">Cc:</span></b> Robby Oylear; Brad Robinson; <a rel="nofollow" ymailto="mailto:equest-users@lists.onebuilding.org" target="_blank" href="mailto:equest-users@lists.onebuilding.org">equest-users@lists.onebuilding.org</a><br>
<b><span style="font-weight:bold;">Subject:</span></b> Re: [Equest-users]
URGENT: Window U-values: Total window assembly v/s Glass only</span></font></div>
</div>
<div class="yiv1173912860MsoNormal"><font color="black" face="Times New Roman" size="3"><span style="font-size:12.0pt;"> </span></font></div>
<div class="yiv1173912860MsoNormal"><font color="black" face="Times New Roman" size="4"><span style="font-size:13.5pt;">Hi Omar,<br>
This is where LEED and eQuest can get complicated. As
you are outside the US the NFRC test results won't apply to you. This is
a US window test standard. Being from Canada we have CSA test
requirements for windows, we don't use NFRC. Basically you need to use
the base standard for your country for your baseline. LEED Canada has
adjusted the LEED documents in this area to reflect our testing agency and what
we consider a base window. Has the country you are building in done the
same?<br>
So to get you going I would assume a base window in eQuest
for the baseline. Use 6mm clear glass, 1/2" air space, 6mm glass,
metal spacer. Also pick a base frame as well, this would depend on the
type of building you are doing, so select a plain frame in common use, if metal
choose a frame without a thermal break. This should be easy to defend on
a LEED review. If there is a specific country version of LEED for your
location then you could adjust for this later once you get the required
information. For your proposed you would build the window you are
considering using the window manufacturers specs. All manufacturers will
not offer all glass types. In the window industry there are the glass
manufacturers, they make the glass. Window manufacturers buy the glass
and make the frames. Now you can see the reasoning behind the NFRC
testing and testing the total window, glass and frame, it is window
manufacturer specific. But it does make a conflict with eQuest and the
way it was programmed and the way windows are input. Realistically the
frame it not going to make much difference except if it is metal and there is a
thermal break. The glass being the overwhelming area of the window is
going to have the largest impact. This is what you want to be playing
with in eQuest, determining the cost effectiveness of different types of glass
and the payouts. As long as you operate from a realistic baseline which
is the current standard construction used in the country of the build then you
can evaluate your proposed glass because you are looking at differential costs
and savings. If your baseline changes it won't make very much difference,
you have already been able to select your window, it will just effect the
payback period and it will be a minor difference. This does let you get
98% of the window work done.<br>
Bruce Easterbrook P.Eng.<br>
Abode Engineering<br>
</span></font><br>
On 28/07/2011 08:40 AM, Omar Katanani wrote: </div>
<div class="yiv1173912860MsoNormal"><font color="navy" face="Arial" size="2"><span style="font-size:10.0pt;font-family:Arial;color:navy;">Dear all,</span></font></div>
<div class="yiv1173912860MsoNormal"><font color="navy" face="Arial" size="2"><span style="font-size:10.0pt;font-family:Arial;color:navy;"> </span></font></div>
<div class="yiv1173912860MsoNormal"><font color="navy" face="Arial" size="2"><span style="font-size:10.0pt;font-family:Arial;color:navy;">Thank you for your responses.</span></font></div>
<div class="yiv1173912860MsoNormal"><font color="navy" face="Arial" size="2"><span style="font-size:10.0pt;font-family:Arial;color:navy;"> </span></font></div>
<ol style="margin-top:0cm;" start="1" type="1">
<li class="yiv1173912860MsoNormal" style="color:navy;"><font color="navy" face="Arial" size="2"><span style="font-size:10.0pt;font-family:Arial;">Are the NFRC testing and the
values in table A8.2 used for the Baseline, Proposed, or both scenarios?</span></font></li>
</ol>
<div class="yiv1173912860MsoNormal" style="margin-left:18.0pt;"><font color="navy" face="Arial" size="2"><span style="font-size:10.0pt;font-family:Arial;color:navy;"> </span></font></div>
<ol style="margin-top:0cm;" start="2" type="1">
<li class="yiv1173912860MsoNormal" style="color:navy;"><font color="navy" face="Arial" size="2"><span style="font-size:10.0pt;font-family:Arial;">Let’s say I do not have
NFRC test results and decide to use the values in table A8.2. For a clear
double glazed and metal frame type, I get an assembly U-factor of 5.1. How
can I input this into eQUEST? As far as I know, I can enter the glass
properties and the frame properties. Do I have to play with the glass
properties and check the LV-D report for the calculated Assembly u-value?</span></font></li>
</ol>
<div class="yiv1173912860MsoNormal" style="text-indent:36.0pt;"><font color="navy" face="Arial" size="2"><span style="font-size:10.0pt;font-family:Arial;color:navy;">Similarly,
for the baseline, Tables 5.5-1 to 5.5-8 of ASHRAE 90.1 provide the assembly
u-values for vertical glazing. How can I enter these values into eQUEST?</span></font></div>
<div class="yiv1173912860MsoNormal" style="margin-left:18.0pt;"><font color="navy" face="Arial" size="2"><span style="font-size:10.0pt;font-family:Arial;color:navy;"> </span></font></div>
<ol style="margin-top:0cm;" start="3" type="1">
<li class="yiv1173912860MsoNormal" style="color:navy;"><font color="navy" face="Arial" size="2"><span style="font-size:10.0pt;font-family:Arial;">I am attaching the specs of the
proposed glazing. These numbers are for the glass only (note that the
u-values reported are NFRC ones). Additionally, I know that the frame will
be aluminium. Do I still need NFRC U-values for the whole assembly, or is
the NFRC usually for the glass only? If yes, how can I calculate the whole
assembly U-value (given that eQUEST doesn’t have the ability to
calculate this)</span></font></li>
</ol>
<div class="yiv1173912860MsoNormal"><font color="navy" face="Arial" size="2"><span style="font-size:10.0pt;font-family:Arial;color:navy;"> </span></font></div>
<div class="yiv1173912860MsoNormal"><font color="navy" face="Arial" size="2"><span style="font-size:10.0pt;font-family:Arial;color:navy;">Thanks for clarifying this, as my project
is outside the US and we are not too familiar with standards such as NFRC.</span></font></div>
<div class="yiv1173912860MsoNormal"><font color="navy" face="Arial" size="2"><span style="font-size:10.0pt;font-family:Arial;color:navy;"> </span></font></div>
<div class="yiv1173912860MsoNormal"><font color="navy" face="Arial" size="2"><span style="font-size:10.0pt;font-family:Arial;color:navy;">Best regards,</span></font></div>
<div>
<div class="yiv1173912860MsoNormal"><font color="navy" face="Arial" size="2"><span style="font-size:10.0pt;font-family:Arial;color:navy;">Omar</span></font></div>
<div class="yiv1173912860MsoNormal"><font color="navy" face="Arial" size="2"><span style="font-size:10.0pt;font-family:Arial;color:navy;">___________________________</span></font><font color="navy"><span style="color:navy;"> </span></font></div>
<div class="yiv1173912860MsoNormal"><font color="navy" face="Arial" size="2"><span style="font-size:10.0pt;font-family:Arial;color:navy;">Omar Katanani</span></font><font color="navy"><span style="color:navy;"><br>
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<div class="yiv1173912860MsoNormal"><b><font color="black" face="Tahoma" size="2"><span style="font-size:10.0pt;font-family:Tahoma;font-weight:bold;" lang="EN-US">From:</span></font></b><font face="Tahoma" size="2"><span style="font-size:10.0pt;font-family:Tahoma;" lang="EN-US">
Robby Oylear [<a rel="nofollow" ymailto="mailto:robbyoylear@gmail.com" target="_blank" href="mailto:robbyoylear@gmail.com">mailto:robbyoylear@gmail.com</a>]
<br>
<b><span style="font-weight:bold;">Sent:</span></b> 28 July 2011 00:53<br>
<b><span style="font-weight:bold;">To:</span></b> Omar Katanani<br>
<b><span style="font-weight:bold;">Cc:</span></b> Brad Robinson; <a rel="nofollow" ymailto="mailto:equest-users@lists.onebuilding.org" target="_blank" href="mailto:equest-users@lists.onebuilding.org">equest-users@lists.onebuilding.org</a><br>
<b><span style="font-weight:bold;">Subject:</span></b> Re: [Equest-users]
URGENT: Window U-values: Total window assembly v/s Glass only</span></font></div>
</div>
<div class="yiv1173912860MsoNormal"><font color="black" face="Times New Roman" size="3"><span style="font-size:12.0pt;"> </span></font></div>
<div class="yiv1173912860MsoNormal"><font color="black" face="Times New Roman" size="3"><span style="font-size:12.0pt;">Omar,</span></font></div>
<div>
<div class="yiv1173912860MsoNormal"><font color="black" face="Times New
Roman" size="3"><span style="font-size:12.0pt;"> </span></font></div>
</div>
<div>
<div class="yiv1173912860MsoNormal"><font color="black" face="Times New
Roman" size="3"><span style="font-size:12.0pt;">To directly answer your
question:</span></font></div>
</div>
<div>
<div class="yiv1173912860MsoNormal"><font color="black" face="Times New
Roman" size="3"><span style="font-size:12.0pt;"> </span></font></div>
</div>
<div>
<div class="yiv1173912860MsoNormal"><font color="black" face="Times New
Roman" size="3"><span style="font-size:12.0pt;">"</span></font><span><font color="navy" face="Arial" size="1"><span style="font-size:9.0pt;font-family:Arial;color:navy;">I’m assuming that,
given that I entered the u-values for the glass only, and then I entered
information about the frame, then I need not worry about any conversions in
U-values, <u>since eQUEST has all the necessary information to calculate
the equivalent u-value of the whole pane + frame assembly,</u>right?</span></font></span>"</div>
</div>
<div>
<div class="yiv1173912860MsoNormal"><font color="black" face="Times New
Roman" size="3"><span style="font-size:12.0pt;"> </span></font></div>
</div>
<div>
<div class="yiv1173912860MsoNormal"><font color="black" face="Times New
Roman" size="3"><span style="font-size:12.0pt;">No. Your method
will result in an assembly U-value based on your input glass conductance and
whatever default frame properties that the eQUEST wizard will use. I have
never tried to let eQUEST determine an assembly value, as NFRC values are
required for LEED and code compliance studies. I would not be surprised
if the values eQUEST is calculating (shown in LV-D and LV-E reports like
previously mentioned) are much different than what you'll actually see in the
test results.</span></font></div>
</div>
<div>
<div class="yiv1173912860MsoNormal"><font color="black" face="Times New
Roman" size="3"><span style="font-size:12.0pt;"> </span></font></div>
</div>
<div>
<div class="yiv1173912860MsoNormal"><font color="black" face="Times New
Roman" size="3"><span style="font-size:12.0pt;">Again, NFRC values are a
LEED requirement, so unless you're just doing preliminary analysis for a
client, you need to receive NFRC simulation reports or certified product
directory numbers in accordance with NFRC 100.</span></font></div>
</div>
<div>
<div class="yiv1173912860MsoNormal"><font color="black" face="Times New
Roman" size="3"><span style="font-size:12.0pt;"> </span></font></div>
</div>
<div>
<div class="yiv1173912860MsoNormal" style="margin-top:1.0pt;"><b><span><font color="#632423" face="Verdana" size="2"><span style="font-size:10.0pt;font-family:Verdana;color:#632423;font-weight:bold;">Robby Oylear, LEED<sup>®</sup><span> AP BD+C</span></span></font></span></b></div>
<div class="yiv1173912860MsoNormal"><i><span><font color="black" face="Verdana" size="1"><span style="font-size:8.0pt;font-family:Verdana;font-style:italic;">Mechanical Project Engineer</span></font></span></i></div>
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<div class="yiv1173912860MsoNormal"><font color="black" face="Times New
Roman" size="3"><span style="font-size:12.0pt;"> </span></font></div>
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Roman" size="3"><span style="font-size:12.0pt;"> </span></font></div>
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Roman" size="3"><span style="font-size:12.0pt;"> </span></font></div>
<div>
<div class="yiv1173912860MsoNormal"><font color="black" face="Times New
Roma" size="3"><span style="font-size:12.0pt;">On Wed, Jul 27, 2011 at
2:44 PM, <<a rel="nofollow" ymailto="mailto:omar@ecoconsulting.net" target="_blank" href="mailto:omar@ecoconsulting.net">omar@ecoconsulting.net</a>>
wrote:</span></font></div>
<div class="yiv1173912860MsoNormal"><font color="black" face="Times New
Roma" size="3"><span style="font-size:12.0pt;">Dear Robby,<br>
<br>
Yes, I am modeling for LEED purposes.<br>
I'll look into A8.2. But at least, is my method correct for the proposed
scenario?<br>
<br>
Brad: I think you need to enter the center of glass u-value in the "Glass
Type", and then enter the frame properties in the "Window"
properties...<br>
<br>
Best,<br>
Omar</span></font></div>
<div>
<div class="yiv1173912860MsoNormal" style="margin-bottom:12.0pt;"><font color="black" face="Times New Roman" size="3"><span style="font-size:12.0pt;"><br>
<br>
Quoting Brad Robinson <<a rel="nofollow" ymailto="mailto:brad.robinson@yahoo.com" target="_blank" href="mailto:brad.robinson@yahoo.com">brad.robinson@yahoo.com</a>>:</span></font></div>
</div>
<blockquote style="border:none;border-left:solid #CCCCCC 1.0pt;padding:0cm 0cm 0cm 6.0pt;margin-left:4.8pt;margin-top:5.0pt;margin-right:0cm;margin-bottom:5.0pt;">
<div>
<div class="yiv1173912860MsoNormal"><font color="black" face="Times New
" size="3"><span style="font-size:12.0pt;"><br>
<br>
Is the u-value listed for a manufacturer and specific model on the NRCAN
website centre of glass or overall assembly? Many windows are custom made
to suit so I am unclear if each individual custom window would need to be
tested.<br>
<br>
<br>
<br>
In eQuest, when entering the window, if the u-value represents the whole
window, including frame, do you need to enter a frame width, conductance etc as
well under the Window Frame section under Window Properties? Thanks.<br>
<br>
<br>
Brad Robinson<br>
<br>
<br>
<br>
________________________________<br>
From: Robby Oylear <<a rel="nofollow" ymailto="mailto:robbyoylear@gmail.com" target="_blank" href="mailto:robbyoylear@gmail.com">robbyoylear@gmail.com</a>><br>
To: Omar Katanani <<a rel="nofollow" ymailto="mailto:omar@ecoconsulting.net" target="_blank" href="mailto:omar@ecoconsulting.net">omar@ecoconsulting.net</a>><br>
Cc: <a rel="nofollow" ymailto="mailto:equest-users@lists.onebuilding.org" target="_blank" href="mailto:equest-users@lists.onebuilding.org">equest-users@lists.onebuilding.org</a><br>
Sent: Wednesday, July 27, 2011 12:32:08 PM<br>
Subject: Re: [Equest-users] URGENT: Window U-values: Total window assembly v/s
Glass only<br>
<br>
<br>
Omar,<br>
<br>
The answer depends on the purpose of your study. If you're trying to get
results for a client on the impact of the glazing on their energy performance,
this may be adequate. Make sure you've entered in the framing information
properly (metal vs. non-metal).<br>
<br>
I'd recommend opening up your simulation output results file (xxxx.SIM) and
going to the either the last page of the LV-D report or sort through your LV-E
report to see what value eQUEST has calculated. Compare these values to
the ASHRAE Fundamentals results for overall assembly values including frame to
see how close you've come. I would not blindly trust that eQUEST will
give you an appropriate overall assembly value based on entering only the
center of glass number.<br>
<br>
However, if this is for a LEED study, this is not adequate. This an
excerpt from an e-mail I sent out recently regarding LEED and NFRC
requirements.<br>
<br>
In order to meet LEED EAp2 Minimum Energy Performance, the project must comply
with all mandatory provisions of ASHRAE 90.1-2007. Section 5.4.2
Fenestration and Doors requires that fenestration performance be determined per
section 5.8.2. Section 5.8.2.4 U-factor requires that the U-factor for
the overall fenestration area (including framing) be determined in accordance
with NFRC 100. If you do not have NFRC data available, values from section A8.2
are the only acceptable alternative.<br>
<br>
Robby Oylear, LEED®AP BD+C<br>
Mechanical Project Engineer<br>
Energy Analyst<br>
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<div class="yiv1173912860MsoNormal"><font color="black" face="Times New
Ro" size="3"><span style="font-size:12.0pt;">D206-788-4571
|C206-354-2721</span></font></div>
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<div class="yiv1173912860MsoNormal"><font color="black" face="Times New
" size="3"><span style="font-size:12.0pt;"><br>
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On Wed, Jul 27, 2011 at 8:14 AM, Omar Katanani <<a rel="nofollow" ymailto="mailto:omar@ecoconsulting.net" target="_blank" href="mailto:omar@ecoconsulting.net">omar@ecoconsulting.net</a>>
wrote:<br>
<br>
Dear all,</span></font></div>
<div class="yiv1173912860MsoNormal"><font color="black" face="Times New
" size="3"><span style="font-size:12.0pt;"> <br>
I have a small question regarding entering</span></font></div>
<div class="yiv1173912860MsoNormal"><font color="black" face="Times New
" size="3"><span style="font-size:12.0pt;">window properties to
eQUEST:</span></font></div>
<div class="yiv1173912860MsoNormal"><font color="black" face="Times New
" size="3"><span style="font-size:12.0pt;"> <br>
I have read a lot of emails in the forum</span></font></div>
<div class="yiv1173912860MsoNormal"><font color="black" face="Times New
" size="3"><span style="font-size:12.0pt;">discussing NFRC
testing, LBNL Window 5 import, and other topics that I haven?t<br>
paid attention to before.</span></font></div>
<div class="yiv1173912860MsoNormal"><font color="black" face="Times New
" size="3"><span style="font-size:12.0pt;"> <br>
The way I modelled my windows is the</span></font></div>
<div class="yiv1173912860MsoNormal"><font color="black" face="Times New
" size="3"><span style="font-size:12.0pt;">following:</span></font></div>
</div>
<blockquote style="border:none;border-left:solid #CCCCCC 1.0pt;padding:0cm 0cm 0cm 6.0pt;margin-left:4.8pt;margin-top:5.0pt;margin-right:0cm;margin-bottom:5.0pt;">
<div class="yiv1173912860MsoNormal"><font color="black" face="Times New
" size="3"><span style="font-size:12.0pt;"> <br>
1. I have manufacturer?s specifications listing the
glass U-values, not the total assembly.<br>
2. In the ?Glass Types? (eQUEST Detailed Mode), I
created glass types, and entered the glass conductance, visible transmittance,
SC, and emissivity from the manufacturer?s details I have.<br>
3. When creating windows, I specify which glass type
(from the ones I created in step 2), in addition to the frame width and
conductance.</span></font></div>
<div>
<div class="yiv1173912860MsoNormal"><font color="black" face="Times
Ne" size="3"><span style="font-size:12.0pt;"><br>
<br>
I?m assuming that, given that I</span></font></div>
</div>
</blockquote>
<div>
<div class="yiv1173912860MsoNormal"><font color="black" face="Times New
" size="3"><span style="font-size:12.0pt;">entered the u-values
for the glass only, and then I entered information about<br>
the frame, then I need not worry about any conversions in U-values, since<br>
eQUEST has all the necessary information to calculate the equivalent u-value of<br>
the whole pane + frame assembly, right?</span></font></div>
<div class="yiv1173912860MsoNormal"><font color="black" face="Times New
" size="3"><span style="font-size:12.0pt;"> <br>
I appreciate your feedback / comments</span></font></div>
<div class="yiv1173912860MsoNormal"><font color="black" face="Times New
" size="3"><span style="font-size:12.0pt;">today if possible,
as this has become really urgent!</span></font></div>
</div>
<blockquote style="border:none;border-left:solid #CCCCCC 1.0pt;padding:0cm 0cm 0cm 6.0pt;margin-left:4.8pt;margin-top:5.0pt;margin-right:0cm;margin-bottom:5.0pt;">
<div>
<div class="yiv1173912860MsoNormal"><font color="black" face="Times
Ne" size="3"><span style="font-size:12.0pt;"> <br>
Many thanks,<br>
Omar<br>
___________________________<br>
Omar Katanani<br>
Sustainable Design Engineer<br>
Email: <a rel="nofollow" ymailto="mailto:omar@ecoconsulting.net" target="_blank" href="mailto:omar@ecoconsulting.net">omar@ecoconsulting.net</a><br>
<br>
EcoConsulting (Lebanon)</span></font></div>
</div>
<div class="yiv1173912860MsoNormal"><font color="black" face="Times New
" size="3"><span style="font-size:12.0pt;">NahasBuilding, 4th
floor</span></font></div>
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<div class="yiv1173912860MsoNormal"><font color="black" face="Times
Ne" size="3"><span style="font-size:12.0pt;"><br>
4 St-Maron Street/ Georges Haddad Avenue<br>
Postal Code: 2028 5806</span></font></div>
</div>
</blockquote>
<div>
<div class="yiv1173912860MsoNormal"><font color="black" face="Times New
" size="3"><span style="font-size:12.0pt;">SAIFI</span></font></div>
<div class="yiv1173912860MsoNormal" style="margin-bottom:12.0pt;"><font color="black" face="Times New Roman" size="3"><span style="font-size:12.0pt;">Beirut</span></font>, Lebanon<br>
Tel: <a rel="nofollow">+961 (0) 1 971 266</a><br>
Mobile: <a rel="nofollow">+961 (0) 3 045 045</a><br>
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<pre><font color="black" face="Courier New" size="2"><span style="font-size:10.0pt;"><fieldset></fieldset>_______________________________________________</span></font></pre><pre><font color="black" face="Courier New" size="2"><span style="font-size:10.0pt;">Equest-users mailing list</span></font></pre>
<pre><font color="black" face="Courier New" size="2"><span style="font-size:10.0pt;"><a rel="nofollow" target="_blank" href="http://lists.onebuilding.org/listinfo.cgi/equest-users-onebuilding.org">http://lists.onebuilding.org/listinfo.cgi/equest-users-onebuilding.org</a></span></font></pre>
<pre><font color="black" face="Courier New" size="2"><span style="font-size:10.0pt;">To unsubscribe from this mailing list send a blank message to <a rel="nofollow" ymailto="mailto:EQUEST-USERS-UNSUBSCRIBE@ONEBUILDING.ORG" target="_blank" href="mailto:EQUEST-USERS-UNSUBSCRIBE@ONEBUILDING.ORG">EQUEST-USERS-UNSUBSCRIBE@ONEBUILDING.ORG</a></span></font></pre>
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