The Sentinel D‑Box Twin Fan 200mm (Stock Ref: SENT200T) is a commercial demand ventilation unit designed for effective airflow control. Compatible with duct sizes from 100mm to 500mm, it delivers airflow between 0.001 and 1.3 m³/s and pressures up to 650 Pa. Equipped with energy-saving EC/DC motors and a lockable isolator, the fan ensures efficient performance and simple maintenance. Its robust Aluzinc construction is suitable for both indoor and outdoor use. Manufactured to BS EN ISO 9001 standards and performance-tested to BS848 Part 1 & 2, this fan provides reliable, energy-efficient ventilation for a range of commercial applications.