The Sentinel D‑Box Twin Fan 150mm (Stock Ref: SENT150T) is a reliable demand ventilation unit designed for commercial environments. It accommodates duct sizes from 100mm to 500mm, delivering airflow from 0.001 to 1.3 m³/s and pressures up to 650 Pa. Featuring energy-saving EC/DC motors and a lockable isolator, the fan ensures efficient performance and easy maintenance. Its robust Aluzinc construction makes it suitable for both internal and external installation. Manufactured under BS EN ISO 9001 standards and performance-tested to BS848 Part 1 & 2, this fan provides dependable, energy-efficient ventilation for commercial applications.