Rectangular ducts manufactured from galvanized steel with thickness 0.45 - 1.20 mm and stainless steel with thickness 0.4 - 0.8 mm. The rectangular ducts are suitable for air conditioning and air ventilation system.
The finished round duct has a double seam with continuous spiral throughout the pipe which makes it stronger than other pipes. The duct is light weight and be able to withstand positive and negative pressure up to 2500 PA (10WG). The diameter are from 75 mm (3") - 2,000 mm (80"), standard length 3 m or as required.