There are various approved ways of building a welded joint for grease exhaust ductwork. The decisions will rely upon the code on your jurisdiction but really should include things like flanged, telescoping, Bell variety or overlapping joints. ROCKWOOL ROXUL Safe and sound® is usually a stone wool fireblocking insulation made https://miloshvjx.blogunteer.com/35766908/about-grease-tight-extract-ductwork