[Equest-users] Aluminum infill panel behind the glass

Nick Caton ncaton at smithboucher.com
Fri Aug 16 14:44:00 PDT 2013

I also have modeled opaque elements like this as distinct wall constructions more than once for LEED without issue.

I believe spandrel glass systems typically fall squarely into the glossary definition of "wall --> steel framed."  Review the glossary terms to be sure and decide if instead the "Wood framed/other"  envelope category is a better fit.


[cid:489575314 at 22072009-0ABB]


Smith & Boucher Engineers
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From: equest-users-bounces at lists.onebuilding.org [mailto:equest-users-bounces at lists.onebuilding.org] On Behalf Of Morteza Kasmai
Sent: Friday, August 16, 2013 2:42 PM
To: Howe, Timothy
Cc: equest-users at lists.onebuilding.org
Subject: Re: [Equest-users] Aluminum infill panel behind the glass

Many thanks Tim,
I cannot select any table in ASHRAE appendix A for this type of wall. How can I select U-factor for this wall?


On Fri, Aug 16, 2013 at 3:26 PM, Howe, Timothy <Timothy.Howe at stantec.com<mailto:Timothy.Howe at stantec.com>> wrote:
Spandrel isn't vision glazing and should not be modeled as a "window".  It is a particular opaque wall type that should be modeled as a wall.  The only difference is that instead of having a brick, EFIS, stone, metal panel, etc., the exterior surface in a spandrel wall assembly is glass.


Timothy Howe, MS, BEMP, LEED® AP BD+C
Mechanical Engineer
61 Commercial Street
Rochester NY 14614
Ph:   (585) 413-5347<tel:%28585%29%20413-5347>
Fx:   (585) 272-1814<tel:%28585%29%20272-1814>
Cell: (585) 281-3223<tel:%28585%29%20281-3223>

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From: equest-users-bounces at lists.onebuilding.org<mailto:equest-users-bounces at lists.onebuilding.org> [mailto:equest-users-bounces at lists.onebuilding.org<mailto:equest-users-bounces at lists.onebuilding.org>] On Behalf Of Morteza Kasmai
Sent: Friday, August 16, 2013 3:10 PM
To: equest-users at lists.onebuilding.org<mailto:equest-users at lists.onebuilding.org>
Subject: [Equest-users] Aluminum infill panel behind the glass

Hello all,
Attached is a part of wall section of the proposed model of office building anticipated LEED silver certification.
8-43 is Alum. Curtain wall system (KAWNEER CLEARWALL) fritted pattern on #2 clear glazing surface and painted spandrel on #4 clear glazing (U-0.48, SHGC-0.39) and 8-45 is Aluminum infill panel with 2" rigid insulation.
I am assuming this part as spandrel glass in the proposed model. How can I add the effect of 8-45 that is behind the glass?
I would appreciate your comments.
[Inline image 1]


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