Flat Oval Spiral Duct Look at the down below video to see the installation of oval duct and fittings. Detect which the reducer getting used is undersized on its collar letting the oval duct to slide over the collar. They may be applying Unistrut with threaded rods as hangers with https://miloduiwj.idblogz.com/37049431/top-guidelines-of-oval-conduit