Flat Oval Spiral Duct Enjoy the underneath movie to begin to see the installation of oval duct and fittings. See the reducer being used is undersized on its collar letting the oval duct to slip around the collar. They're using Unistrut with threaded rods as hangers for the ductwork. We https://connerzrfui.ltfblog.com/35435206/top-latest-five-oval-conduit-urban-news