Prefabricated grease ducts give exceptional protection against grease leakage as compared to regular area-welded techniques. These manufacturing facility-developed elements offer: Promat has developed self-supporting techniques with out a steel liner, for instance PROMATECT®-Advertisement, PROMATECT®-L500 and MASTERBOARD®, that may match the leakage and air flow efficiency of steel du... https://fire-resisting-ductwork-i78900.ambien-blog.com/43426059/not-known-factual-statements-about-grease-tight-extract-ductwork