I?d model it as a window with the U-factor and SHGC of glass block.
How did you model it in 2009? https://onebuilding.org/archive/equest-users-onebuilding.org/2009-October/025927.html
~Bill

William Bishop, PE, BEMP, BEAP, CEM, LEED AP | Pathfinder Engineers & Architects LLP
Senior Energy Engineer
[Logo, company nameDescription automatically generated] T: (585) 698-1956 www.pathfinder-ea.com
[IconDescription automatically generated][cid:image009.jpg at 01D93AD6.5A9225C0]bbishop at pathfinder-ea.com
134 South Fitzhugh Street
Rochester, NY 14608

Buffalo Office: 100 Corporate Parkway, Suite 116, Amherst, NY 14226