The 90-Degree Register Box creates a right angle (90-degree) transition from round pipe or insulated flexible duct to an air register or grille. It is made of galvanized steel to provide strength and ...

HVAC ductwork includes pipe or closed conduits made of sheet metal, fiberglass board, or other suitable material for conducting air to and from an air handling unit. HVAC is an acronym for heating, ...

You may need to know how to cut sheet metal while working on DIY craft projects, gutter repair, ductwork, or metal roofing.