Ventilation duct is supplied as circular or oval spiral duct and fittings that can be manufactured in galvabond or SS material from 76mm to 2420mm diameter and is suitable for air ventilation or fume exhaust. Ventilation duct has a 4 ply folded lockseam construction with a very smooth and airflow efficient interior surface. The duct can be corrugated to resist collapse from negative pressures in an exhaust application.
