This high-performance duct is precision-engineered from heavy-gauge galvanized steel to provide superior corrosion resistance and maximum structural integrity in demanding commercial HVAC systems. The robust construction is designed to withstand high-velocity airflow and pressure fluctuations without warping, ensuring long-term mechanical reliability.
At Firmac Industries, we manufacture a wide range of rectangular ducts to meet the most stringent HVAC/Industrial specification and quality standard. Rectangular ducts are fabricated out of hot dipped galvanized steel sheet/coil of lock forming duct material. All the ducts are manufactured in accordance to SMACNA, DW 144 and ASHRAE standards. GI ducts are available in various raw material makes like Nippon Steel Japan, Nisshin Steel Japan, AGIS U.A.E, Jindal Steel India, Hadeed Steel KSA, and others as per project requirement. GI Coils/sheet always confirm to ASTM A653 standard or equivalent having a minimum zinc coating of G90.
SMACNA, DW 144 and ASHRAE standards.
Nippon Steel Japan, Nisshin Steel Japan, AGIS U.A.E, Jindal Steel India, Hadeed Steel KSA, and GI Coils/sheet always confirm to ASTM A653 standard or equivalent having a minimum zinc coating of G90.
