The BD-BOX series, consisting of double-inlet centrifugal fans coupled to the motor via pulleys and belts (BD), housed in a plenum (BOX) lined with sound-absorbing material, is particularly suitable for extracting or supplying air in residential and commercial environments (offices, gyms, shops, restaurants) or industrial settings (machine rooms, electrical panel rooms…) where quiet operation is required alongside a high airflow rate. The ability to adjust the rotational speed through the belt drive, combined with a broader range of fan models, makes the application scope of this series much wider and more flexible than that of directly coupled fans (DC-BOX).

The series includes 9 sizes with airflow rates from 500 to 32,000 m³/h.