Grease or kitchen extract ductwork is often produced from steel, usually galvanised sheet steel in a rectangular or spiral-wound round format, but can be produced from all-welded ‘black iron’ or stainless-steel. Kitchen extract systems need to be often inspected, examined, and cleaned to fulfill European and native security laws. It https://fireresistingductwork02344.look4blog.com/66561717/the-kitchen-extract-systems-diaries