Grease duct joints are held jointly by means of shaped V clamps and sealed with 3M Fire Barrier 2000+. Reduction in cross-part: The interior Proportions (width and peak for rectangular ducts, diameter for round ducts) on the smoke extracting ductwork shall not reduce by much more than 10% during the https://greasetightextractductwor79900.theisblog.com/37260365/considerations-to-know-about-grease-tight-extract-ductwork