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The NFRC CMAST database includes ratings for a growing number
storefront and curtainwall products, where ratings are generated
using the NFRC Component Modeling Approach (CMA). These are
project-specific ratings based on specific combinations of frame,
glazing unit, and spacer, but if they match your proposed design, I
would guess that LEED would accept these ratings as an acceptable
substitute for your own WINDOW/THERM analysis.<br>
<br>
<a class="moz-txt-link-freetext" href="http://cmast.nfrc.org/Product/ProductFind.aspx">http://cmast.nfrc.org/Product/ProductFind.aspx</a><br>
<br>
David<br>
<br>
<br>
<div class="moz-cite-prefix">On 4/15/2013 12:34 PM, Paul Diglio
wrote:<br>
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<div style="font-family:times new roman,new
york,times,serif;font-size:10pt">Thanks Bill, the comment you
received is encouraging.<br>
<div> </div>
Paul Diglio, CEM, CBCP<br>
<br>
<div>87 Fairmont Avenue<br>
New Haven, CT 06513<br>
203-415-0082</div>
<br>
<br>
<div><span><a moz-do-not-send="true" target="_blank"
href="http://www.pdigliollc.com">www.pdigliollc.com</a></span>
<div><br>
</div>
<div style="font-family:times new roman, new york, times,
serif;font-size:10pt"><br>
<div style="font-family:times new roman, new york, times,
serif;font-size:12pt"><font face="Tahoma" size="2">
<hr size="1"><b><span style="font-weight: bold;">From:</span></b>
"Bishop, Bill" <a class="moz-txt-link-rfc2396E" href="mailto:bbishop@pathfinder-ea.com"><bbishop@pathfinder-ea.com></a><br>
<b><span style="font-weight: bold;">To:</span></b> Paul
Diglio <a class="moz-txt-link-rfc2396E" href="mailto:paul.diglio@sbcglobal.net"><paul.diglio@sbcglobal.net></a>;
<a class="moz-txt-link-rfc2396E" href="mailto:equest-users@lists.onebuilding.org">"equest-users@lists.onebuilding.org"</a>
<a class="moz-txt-link-rfc2396E" href="mailto:equest-users@lists.onebuilding.org"><equest-users@lists.onebuilding.org></a><br>
<b><span style="font-weight: bold;">Sent:</span></b>
Mon, April 15, 2013 2:45:18 PM<br>
<b><span style="font-weight: bold;">Subject:</span></b>
RE: [Equest-users] LEED Fenestration Modeling Question<br>
</font><br>
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<p class="MsoNormal"><span
style="font-size:11.0pt;color:#1F497D;">Paul,</span></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;color:#1F497D;"> </span></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;color:#1F497D;">I recently
received the following comment in a LEED review for
a LEED-NC v2009 project:</span></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;color:#1F497D;"><img
id="Picture_x0020_1"
src="cid:part2.09010608.00030104@gmail.com"
height="154" width="682"></span><span
style="font-size:11.0pt;color:#1F497D;"></span></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;color:#1F497D;">This implies
that Window v6.3 calculations are acceptable in lieu
of NFRC ratings. The comment does not exclude the
modeler from performing the calculation.</span></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;color:#1F497D;">Of course, I
have no idea if this is boilerplate language or if
LEED reviewers have discretion here. It is also
possible that requirements will become stricter for
newer projects.</span></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;color:#1F497D;"> </span></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;color:#1F497D;">Regards,</span></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;color:#1F497D;">Bill</span></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;color:#1F497D;"> </span></p>
<div>
<p class="MsoNormal"><b><span
style="font-size:10.0pt;color:black;">William
Bishop, PE, BEMP, LEED AP
</span></b><b><span
style="font-size:10.0pt;color:#006600;">|</span></b><b><span
style="font-size:10.0pt;color:black;">
Pathfinder Engineers & Architects LLP</span></b></p>
<p class="MsoNormal"><span
style="font-size:9.0pt;color:black;">Senior Energy
Engineer</span></p>
<p class="MsoNormal"><span
style="font-size:5.0pt;color:black;"> </span></p>
<p class="MsoNormal"><span
style="font-size:9.0pt;color:#1F497D;">134 South
Fitzhugh Street</span><span
style="font-size:9.0pt;color:#1F497D;">
</span><span style="font-size:9.0pt;color:#1F497D;">Rochester,
NY 14608</span></p>
<p class="MsoNormal"><span
style="font-size:9.0pt;color:#1F497D;">T: (585)
325-6004
</span><span style="font-size:9.0pt;color:black;">Ext.
114</span><span style="color:#1F497D;">
</span><span style="font-size:9.0pt;color:#1F497D;">F:
(585) 325-6005</span><span
style="font-size:9.0pt;color:black;"></span></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;color:#1F497D;"><a
moz-do-not-send="true" rel="nofollow"
ymailto="mailto:wbishop@pathfinder-ea.com"
target="_blank"
href="mailto:wbishop@pathfinder-ea.com"><span
style="font-size:9.0pt;">bbishop@pathfinder-ea.com</span></a></span><span
style="font-size:9.0pt;color:black;">
</span><span style="font-size:11.0pt;color:#1F497D;"><a
moz-do-not-send="true" rel="nofollow"
target="_blank"
href="http://www.pathfinder-ea.com/"><span
style="font-size:9.0pt;">www.pathfinder-ea.com</span></a></span><span
style="font-size:9.0pt;color:black;"></span></p>
<p class="MsoNormal"><span
style="font-size:14.0pt;font-family:Webdings;color:green;">P</span><span
style="font-size:14.0pt;color:green;">
</span><span style="font-size:7.5pt;color:green;">Sustainability
– the forest AND the trees.</span><span
style="font-size:18.0pt;font-family:Webdings;color:green;">
</span><span
style="font-size:14.0pt;font-family:Webdings;color:green;">P</span><span
style="font-size:14.0pt;color:green;"> </span><span
style="font-size:11.0pt;color:#1F497D;"></span></p>
</div>
<p class="MsoNormal"><span
style="font-size:11.0pt;color:#1F497D;"> </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;">From:</span></b><span
style="font-size:10.0pt;">
<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>Paul Diglio<br>
<b>Sent:</b> Monday, April 15, 2013 2:34 PM<br>
<b>To:</b> <a class="moz-txt-link-abbreviated" href="mailto:equest-users@lists.onebuilding.org">equest-users@lists.onebuilding.org</a><br>
<b>Subject:</b> [Equest-users] LEED Fenestration
Modeling Question</span></p>
</div>
</div>
<p class="MsoNormal"> </p>
<div>
<p class="MsoNormal"><span
style="font-size:10.0pt;color:black;">Folks:<br>
<br>
I am a bit confused when modeling unrated vertical
fenestration for the proposed model. 90.1 states
that we need to use the values determined in
accordance with NFRC 100 or we can use the data in
Table A8.2 for vertical fenestration per Exception
b, Section 5.8.2.4.<br>
<br>
If so, the values in Table A8.2 exceed the maximum
allowed fenestration u-values listed in Table
5.5-5 (my zone), so will this not disqualify the
proposed building model?<br>
<br>
I have often found it impossible to get the
architect to supply the NFRC assembly ratings of
the glazing and field erected curtain-wall
systems.<br>
<br>
I have used the LBNL Window 6.3 program to
calculate the vertical fenestration ratings, but
90.1 Section 5.8.8.2 states that the fenestration
product shall have a permanently installed
nameplate or the manufacturer shall provide a
signed and dated certification for the installed
fenestration.<br>
<br>
I don't see any wiggle-room where 90.1 allows the
modeler to calculate the NFRC rating of vertical
fenestration.
<br>
<br>
Saying that, I have submitted projects where I
calculated the fenestration assembly u-values
without any kick-back from the GBCI.<br>
<br>
I am concerned that the reviewers will push this
issue since it is now clearly defined on the new
Section 1.4 Table and if I submit my own ratings I
will end up remodeling the project and/or the
proposed building envelope will be rejected since
it doesn't meet the mandatory requirements of
Section 5.4.<br>
<br>
Any thoughts?<br>
<br>
Thank you,</span></p>
<div>
<p class="MsoNormal"><span
style="font-size:10.0pt;color:black;"> </span></p>
</div>
<p class="MsoNormal" style="margin-bottom:12.0pt;"><span
style="font-size:10.0pt;color:black;">Paul Diglio,
CEM, CBCP</span></p>
<div>
<p class="MsoNormal"><span
style="font-size:10.0pt;color:black;">87
Fairmont Avenue<br>
New Haven, CT 06513<br>
203-415-0082</span></p>
</div>
<p class="MsoNormal" style="margin-bottom:12.0pt;"><span
style="font-size:10.0pt;color:black;"> </span></p>
<div>
<p class="MsoNormal"><span
style="font-size:10.0pt;color:black;"><a
moz-do-not-send="true" rel="nofollow"
target="_blank"
href="http://www.pdigliollc.com">www.pdigliollc.com</a></span></p>
<div>
<p class="MsoNormal"><span
style="font-size:10.0pt;color:black;"> </span></p>
</div>
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