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Yujun,<br>
This is a pretty common problem unfortunately. At some point you
will have to just do the best you can. One thing that my colleagues and I
have found helps is to get some idea of the construction of the window
(pane thicknesses, location of films, gas gap thicknesses, frame
descriptions, etc.). These can help guide you and get you pretty close to
the published values. I have not had much luck using Optic5 to generate
new windows. Where I have found Optic5 to be helpful is that it gives
access to the IGDB (International Glazing Data Base); that data base
expands quickly and you can often find the actual manufacturer and window
that you are looking for, export it to Window5 and avoid all the problems
of tuning your window to match the published data.<br>
Kind regards,<br>
David<br><br>
<br>
At 11:46 2/28/2008, Yujun TAO wrote:<br>
<blockquote type=cite class=cite cite="">Dear users,<br>
Do you know how to use Window5 to create a window system with the values
expected?<br>
I want to create a window system with three values followings : <br>
U=2.1 W/m2.K (overall); g (Solar heat gain factor) =0.6; Visible
Transmission=0.7<br>
I can just get sometimes the values "closes", but not so close
like I wish. So help me if you know<br>
In advance Thank you for your help.<br>
Yujun<br><br>
<br>
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