[BLDG-SIM] Bug in Window 5.2

Chris Jones cj at cr-jay.ca
Fri Jun 17 06:51:17 PDT 2005


No wonder I kept getting very surprising results.  Thanks for pointing that 
out.

At 09:02 17/06/2005, you wrote:

>Hi All,
>
>Anyone using Window 5 (any version) to create custom glazing for DOE2 
>simulations should be very careful.  There is a bug in the output feature 
>of Window 5 that incorrectly reports the window film coefficients used to 
>calculate the center of glass U-value.  If you use this data in a DOE 2 
>simulation the calculated center of glass U-value may be off by as much as 
>40%.  BE CAREFUL and check the output reports to verify glazing 
>performance if you are importing Window 5 performance data.  Apparently 
>Window 4 does not have this problem, it worked fine when I tried it.
>
>I have been told that LBNL is aware of the problem but to date has not 
>resolved the issue.
>
>I have only heard one side of the story (and would be happy to hear the 
>other) but it seems like this is another chapter in the ongoing saga of 
>DOE2 vs Energy Plus.  I am not saying this is the case, but it is 
>disturbing to think that software bugs in publicly funded software are not 
>getting fixed for political reasons.
>
>Unfortunately those of us trying to use these tools and can't because of 
>issues like this suffer most.
>
>Sincerely,
>
>Disgruntled Modeler.
>
>Michael Tillou, PE
>etc Group, Inc.
>PO Box 7, Williamstown, MA 01267
>ph. (413) 458-9870  fx. (413) 458-9875
>
>
>
>
>
>
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Chris Jones, P.Eng.
14 Oneida Avenue
Toronto, ON M5J2E3
Tel. 416 203-7465
Fax. 416 946-1005 

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