Grease duct joints are held together by way of fashioned V clamps and sealed with 3M Fire Barrier 2000+. Reduction in cross-area: The internal Proportions (width and height for rectangular ducts, diameter for round ducts) from the smoke extracting ductwork shall not minimize by in excess of 10% during the https://titusyxrkc.laowaiblog.com/35926544/not-known-factual-statements-about-grease-tight-extract-ductwork