[Equest-users] Aluminum infill panel behind the glass

Morteza Kasmai morteza.kasmai at gmail.com
Sun Aug 18 13:12:18 PDT 2013


Aaron,

Thank you for your response. You are right; I check with the architects,
they are using “Kawneer 1600”. I input the data in Frameplus Online and it
gives me U-0.48 for the glass and U-0.20 for the total spandrel with 2”
insulation.

Assuming the spandrel system as steel wall, per Nick’s suggestion (Thanks
Nick), per ASHRAE Table A3.2, assembly U-factor for this wall is 0.113.
Unfortunately, both options indicate U-factors that are greater than the
U-factor of the baseline model (U-0.064 for zone 4A) and reduce the total
energy savings for the project. Am I right in selecting U-factors?



I truly appreciate your help,

Morteza





On Sat, Aug 17, 2013 at 8:29 AM, Aaron Smith <asmith at mreng.ca> wrote:

> Kawneer doesn't seem to have a spandrel panel chart in their Architectural
> detail manual for Clearwall. (
> http://www.kawneer.com/kawneer/north_america/en/product.asp?cat_id=1338&prod_id=4156).
> Is the architect making a custom Spandrel panel?
>
> If so you could use Frameplus Online which models insulation within and
> behind spandrel panels, you just need to figure out the thermal break
> thickness - it has 3 thermal break options.
>
> http://tools.enermodal.com/webframeplus/SpandrelPage.aspx
>
> Aaron
>
> Aaron Smith, P. Eng
> M&R Engineering Ltd.
>
> Sent from my BlackBerry 10 smartphone on the TELUS network.
>   *From: *Morteza Kasmai
> *Sent: *Friday, August 16, 2013 16:41
> *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?
>
> Regards,
>
> Morteza
>
>
>
>
>
> On Fri, Aug 16, 2013 at 3:26 PM, Howe, Timothy <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.**
>> **
>>
>> ** **
>>
>> Tim.****
>>
>> ** **
>>
>> *Timothy Howe, MS, BEMP, LEED® AP BD+C*
>> Mechanical Engineer
>> Stantec****
>>
>> 61 Commercial Street
>> Rochester NY 14614
>> Ph:   (585) 413-5347
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>> Cell: (585) 281-3223****
>>
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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 3:10 PM
>> *To:* 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.****
>>
>> Morteza****
>>
>> [image: Inline image 1]****
>>
>> ** **
>>
>>
>> ****
>>
>> ****
>>
>> ** **
>>
>
>
>
>
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