Grease duct joints are held with each other through formed V clamps and sealed with 3M Fire Barrier 2000+. Contaminants of combustion aren't trapped inside the flue like it is often present in the corners of an oblong structure, thus rendering it easier to clean and reduce the possibility of https://fireresistingductworkinsu79901.shoutmyblog.com/36068643/5-tips-about-fire-resisting-ductwork-insulation-you-can-use-today