The BDF 4 S inline centrifugal duct fan is designed to boost airflow in compact HVAC duct systems where space, reliability, and quiet operation are critical. This fan delivers airflow up to 124 CFM and is capable of generating high static pressure, making it ideal for supply, exhaust, and return air ventilation in residential and light commercial HVAC systems. The unit features a backward-curved centrifugal impeller and galvanized steel cylindrical housing, ensuring durability and stable airflow performance. Its compact inline design allows easy integration into round duct systems. Powered by a 120V- 60 Hz AC motor with ball bearings, thermal protection, and F-class insulation, the fan ensures reliable operation with low energy consumption. The BDF series is widely used for duct boosting, ventilation improvement, growsupply, growtent and airflow balancing in HVAC installations.
