<html><head><style type="text/css"><!-- DIV {margin:0px;} --></style></head><body><div style="font-family:arial,helvetica,sans-serif;font-size:12pt"><div>Ok. . . I have a situation where I'm modeling a facility relative to ASHRAE 90.1 baseline. The customer is using dual pane, low-e windows, with integrated venetian blinds between the two panes of glass. One pane is low-e and the other is clear. Air gap between the two (not Argon or anything like that).<br><br>I use the LBNL Windows tool, with blinds set at 45 deg, and the blinds increase the window assembly U value and SHGC significantly.<br><br>So for performance relative to 90.1, would it be acceptable to simply utilize the U & SHGC from with Windows tool? Are there any restrictions on the angle of the blinds, or whether the angle should be different for winter vs summer?<br><br>I'd appreciate any guidance on how to best model this scenario.<br><br>Thank you,<br>Pete
Baumstark<br>San Jose, CA<br></div>
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