Flanged joints are created by bending the top of your Uncooked duct or fitting to make a ¼” flange. Below may be the code area to the Worldwide Mechanical Code to the permitted welded duct connections sorts. Whether or not you are upgrading existing ventilation hoods for commercial kitchens or https://hectorvpeth.madmouseblog.com/17491529/about-commercial-kitchen-extract-systems