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GBlist: window thermal shock
Further to the below request re: window horror stories, here is one from
our own experience.
During a -28 Dc February sunrise, within 30 minutes (9:00-9:30 AM), we
were able to break 4 south-facing windows when someone came into the office
late and was not able to open our very efficient window shades and the
experimental dual colour venetian blinds (W & B). The black side was facing
outward. A few days later when I returned from out of town, I personally
simulated this situation. Temperature in the window cavity: 100 Dc! Excellent
example of "thermal shock" (delta T 128 Dc) on the window. But not all the
windows broke (lucky for us?). Just some. Now those R-5.2 COG, have been
replaced with R-6.3 COG krypton filled "of the shelf" windows.
___________________________________________________________________________
On Wed, 20 Aug 1997 RCMathis1@aol.com wrote:
>
> Greenbuilding and EE-Building pals,
>
> Hope this post finds you all healthy and happy.
>
> In preparing for an all day "Windows" workshop at the fall Energy Efficient
> Building Association (EEBA) conference, we have set aside some time for
> "Window Horror Stories" (of which there are WAY too many)..... Having read a
> few such stories on the "greenbuilding" and "ee-building" lists, I thought I
> would see how deep the well truly is....
>
> If any of you have any stories or photos or both that describe problems with
> "energy efficient", "green" or otherwise "regular" windows, I would very much
> like to share them with the conference attendees this fall. (All slides or
> info provided would be (1) kept anonymous or (2) referenced as you
> desire....) If there are "happy endings" or "lessons learned" we would like
> to share those as well!!!) Can pertain to new construction or to
> rehab/retrofit.
>
> The WINDOWS workshop is November 5 in Denver preceeding the EEBA conference.
> We plan to de-bunk a lot of the myths about window and glazing performance
> and to provide some guidelines for comparing and selecting products. We
> expect this session at the EEBA conference to be full of "eye openers".
>
> THANKS in advance for your help with this educational endeavor. Any
> materials you might provide will be returned. Please email stories, call or
> send photos directly to:
> R. Christopher Mathis
> MCSquared
> 5249 Columbia Road
> Columbia, MD 21044
> E-mail: rcmathis1@aol.com
> Phone: 301-596-1931
>
> See you in Denver! Thanks again!
> Chris
> ______________________________________________________________________
> This greenbuilding dialogue is sponsored by CREST <www.crest.org>
> Environmental Building News <www.ebuild.com> and Oikos <www.oikos.com>
> For instructions send e-mail to greenbuilding-request@crest.org.
> ______________________________________________________________________
>
______________________________________________________________________
This greenbuilding dialogue is sponsored by CREST <www.crest.org>
Environmental Building News <www.ebuild.com> and Oikos <www.oikos.com>
For instructions send e-mail to greenbuilding-request@crest.org.
______________________________________________________________________
References: