Grease or kitchen extract ductwork is generally comprised of metal, usually galvanised sheet metal in a rectangular or spiral-wound circular format, but can also be comprised of all-welded ‘black iron’ or stainless-steel. There are a number of layout and operational components that have to be regarded when setting up a https://louisumcqe.slypage.com/27955926/kitchen-extract-systems-for-dummies