Flat Oval Spiral Duct Check out the beneath movie to begin to see the installation of oval duct and fittings. Detect which the reducer being used is undersized on its collar allowing the oval duct to slip about the collar. They're employing Unistrut with threaded rods as hangers with the https://round-conduit45566.webbuzzfeed.com/37108187/top-round-conduit-secrets