Omar,<div><br></div><div>To directly answer your question:</div><div><br></div><div>"<span class="Apple-style-span" style="border-collapse: collapse; color: rgb(0, 0, 128); font-family: Arial; font-size: 13px; ">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>"</div>
<div><br></div><div>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.</div>
<div><br></div><div>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.</div>
<div><br></div><div><p class="MsoNormal" style="margin-top:1.0pt"><a name="_MailAutoSig"><b><span style="font-size:10.0pt;font-family:"Verdana","sans-serif";mso-fareast-font-family:
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<p class="MsoNormal" style="line-height:115%"><span style="mso-bookmark:_MailAutoSig"></span><a href="http://www.rushingco.com/"><span style="mso-bookmark:_MailAutoSig"><b><i><span style="font-size:8.0pt;mso-bidi-font-size:11.0pt;line-height:115%;font-family:
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minor-fareast;color:#632423;mso-no-proof:yes">www.rushingco.com</span></i></b></span><span style="mso-bookmark:_MailAutoSig"></span></a><span style="mso-bookmark:_MailAutoSig"><span style="font-size:7.0pt;line-height:115%;font-family:"Verdana","sans-serif";
mso-fareast-font-family:"Times New Roman";mso-fareast-theme-font:minor-fareast;
color:#1F497D;mso-no-proof:yes"></span></span></p></div><div><br></div><div><br></div><div><br><div class="gmail_quote">On Wed, Jul 27, 2011 at 2:44 PM, <span dir="ltr"><<a href="mailto:omar@ecoconsulting.net">omar@ecoconsulting.net</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">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<div class="im"><br>
<br>
Quoting Brad Robinson <<a href="mailto:brad.robinson@yahoo.com" target="_blank">brad.robinson@yahoo.com</a>>:<br>
<br>
</div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div class="im">
<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>
______________________________<u></u>__<br>
From: Robby Oylear <<a href="mailto:robbyoylear@gmail.com" target="_blank">robbyoylear@gmail.com</a>><br>
To: Omar Katanani <<a href="mailto:omar@ecoconsulting.net" target="_blank">omar@ecoconsulting.net</a>><br>
Cc: <a href="mailto:equest-users@lists.onebuilding.org" target="_blank">equest-users@lists.<u></u>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>
<br></div>
D206-788-4571 |C206-354-2721<div class="im"><br>
<a href="http://www.rushingco.com" target="_blank">www.rushingco.com</a><br>
<br>
<br>
<br>
<br>
<br>
On Wed, Jul 27, 2011 at 8:14 AM, Omar Katanani <<a href="mailto:omar@ecoconsulting.net" target="_blank">omar@ecoconsulting.net</a>> wrote:<br>
<br>
Dear all,<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<br>
I have a small question regarding entering<br>
</blockquote>
window properties to eQUEST:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<br>
I have read a lot of emails in the forum<br>
</blockquote>
discussing NFRC testing, LBNL Window 5 import, and other topics that I haven?t<br>
paid attention to before.<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<br>
The way I modelled my windows is the<br>
</blockquote>
following:<br>
</div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<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.<div class="im"><br>
<br>
I?m assuming that, given that I<br>
</div></blockquote><div class="im">
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?<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<br>
I appreciate your feedback / comments<br>
</blockquote>
today if possible, as this has become really urgent!<br>
</div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div class="im">
<br>
Many thanks,<br>
Omar<br>
___________________________<br>
Omar Katanani<br>
Sustainable Design Engineer<br>
Email: <a href="mailto:omar@ecoconsulting.net" target="_blank">omar@ecoconsulting.net</a><br>
<br>
EcoConsulting (Lebanon)<br></div>
NahasBuilding, 4th floor<div class="im"><br>
4 St-Maron Street/ Georges Haddad Avenue<br>
Postal Code: 2028 5806<br>
</div></blockquote><div class="im">
SAIFI<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
Beirut, Lebanon<br>
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<br>
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<br>
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