Duct air ducts are corridors and ducts of air that distribute air to the places to be reached by the air,

and they are made of galvanized sheet sheets because they are characterized by their non-corrosion

or rust, and they are solid and easy to form.

Circular air conditioning duct is made in different shapes, the most important of which is the rectangular

shape or the square shape, and it is considered one of the common shapes that are widely used for easy

concealment with false ceilings.