[Equest-users] Edit Windows Detailed Interface

Rongxin Yin rongxinyin1 at gmail.com
Tue Sep 28 11:06:58 PDT 2010


I would suggest your guys using window 5 or 6 to model the window and then
export the window into the eQuest. That would be more accurate and simply.

Thanks,

Rongxin

On Tue, Sep 28, 2010 at 8:03 AM, Kelsey VanTassel <KVanTassel at sustaineng.com
> wrote:

>  In detail mode, the window properties are separated into two components,
> the “Glass Type” (listed after all the constructions, layers and materials
> in the component tree) and the frame  width and conductance (associated with
> each window). For LEED, it is best to zero out all the frame widths and use
> the window assembly properties in the “Glass Type” definitions. But be
> careful, in detail mode you must specify the GLASS-CONDUCTANCE, which is the
> U-factor of the window without including air films. So normally the process
> would be: obtain NFRC U-factor for the window assembly (or use ASHRAE
> values), look up the appropriate GLASS-CONDUCTANCE in the table in the DOE2
> help file (attached), enter this value into the GLASS-CONDUCTANCE field,
> finally run the model and check the LV-D report (scroll down for building
> summary) to make sure that the U-factors of the windows are correct.
>
>
>
> *Kelsey Van Tassel*
>
> Mechanical Engineer | kvantassel at sustaineng.com
>
> 608.836.4488 ext. 20 | Fax: 608.836.4477
>
>
>
> Sustainable Engineering Group
>
> 901 Deming Way, Suite 201
>
> Madison, WI 53717
>
> www.sustaineng.com
>
>
>
>
>
> *From:* equest-users-bounces at lists.onebuilding.org [mailto:
> equest-users-bounces at lists.onebuilding.org] *On Behalf Of *Scott Meader
> *Sent:* Tuesday, September 28, 2010 9:38 AM
> *To:* equest-users at lists.onebuilding.org
> *Subject:* [Equest-users] Edit Windows Detailed Interface
>
>
>
> I have recently inherited the task of finishing an eQuest model (and I have
> never used eQuest) that someone else has started for LEED EAc1.  We have
> received comments form the LEED reviewer, one being:
>
> 1. Windows and skylights for the Proposed Case were modeled with a U-value
> of 0.32, which does not appear to account 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, or revise the model to reflect framed assembly U-values as shown
> in ASHRAE 90.1-2004 Table A-8.2.
>
> I have looked through the "Modeling Procedures Quick Reference Guide" and
> while it states you can edit or add window types in detailed mode, it skips
> over how to edit them.  Can anyone give me some direction on how to proceed?
>
> Thanks for the help.
>
> Scott
>
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