Flat Oval Spiral Duct View the underneath video to see the set up of oval duct and fittings. Notice the reducer getting used is undersized on its collar permitting the oval duct to slip around the collar. They're applying Unistrut with threaded rods as hangers for that ductwork. We are https://oval-conduit13344.blogrelation.com/43010263/oval-conduit-secrets