Flanged joints are created by bending the top from the raw duct or fitting to create a ¼” flange. Underneath is definitely the code segment with the International Mechanical Code to the permitted welded duct connections sorts. Whether you're upgrading existing ventilation hoods for commercial kitchens or specifying new systems, https://emilianolcqft.thechapblog.com/35907394/commercial-kitchen-extract-systems-fundamentals-explained