Does anyone know definitively if eQuest calculates window assembly U-values
based on user input?

As many have pointed out, the USGBC is now being careful about the
distinction between center-of-glass U values and assembly U values. I?ve
been entering center-of-glass U-values and precise window geometry, counting
on eQuest to do the heavy lifting for me. Report LV-D says ?U-VALUE
INCLUDES OUTSIDE AIR FILM; WINDOW INCLUDES FRAME, IF DEFINED?. However,
combing through several posts to this forum, some say eQuest doesn?t really
calculate an assembly?s U-value, because it ignores the edge-of-glass
effects due to the frame. (Not to be confused with the thermal conductance
of the frame itself, which I?m sure eQuest uses in its calcs.) I?m hoping
that one of the programmers can answer this, or maybe someone who got the
story from a programmer.

I plan to read the ASHRAE Fundamentals Chapter on Fenestration this weekend.
Wish me luck.

Steve Samenski, PE, LEED AP, BEMP