![](/getmedia/31cea657-f59e-454b-9398-163bb4b772ef/Duct-3-Installation-progress-of-return-duct-risers-serving-cleanrooms-connecting-to-mechanical-mezzanine.jpg?width=500&height=374)
Installation progress of return duct risers serving cleanrooms connecting to mechanical mezzanine
Sections of duct were prefabbed, delivered, and installed during the three-day roof rig.
![](/getmedia/7fd2662b-ce73-4cbd-a020-d7fd875dd288/JEC-4.png?width=500&height=375)
New roof ductwork was installed before being connected to the fans.
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The city of Sacramento opted for all new ductwork for the Convention Center expansion and renovation.
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Miller Bonded: Five duct systems at the UNM's interdisciplinary Science Building.