Inline Centrifugal Duct Fans are offered in different sizes ranging from 100 mm, 125 mm, 150 mm, 200 mm, 250 mm, 315 mm, 350 mm and 400 mm. These Duct Fans function in air flow range varying from 300 CMH to 4200 CMH. These Duct Fans are connected in line with ducting system to suck and deliver the air with less noise level and without leakage. Inline Centrifugal Duct Fans are equipped with quiet and efficient backward-curved impeller that is capable of developing sufficient amount of pressure and simplifies installation.