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).

I use the LBNL Windows tool, with blinds set at 45 deg, and the blinds increase
the window assembly U value and SHGC significantly.

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?

I'd appreciate any guidance on how to best model this scenario.

Thank you,
Pete Baumstark
San Jose, CA