The Sentinel D‑Box Twin Fan 200mm (Stock Ref: SENT200T) is a commercial demand ventilation unit designed to provide efficient airflow management. Suitable for duct sizes from 100mm to 500mm, it delivers airflow ranging from 0.001 to 1.3 m³/s with pressures up to 650 Pa. The fan is equipped with energy-efficient EC/DC motors and a lockable isolator for safe operation and easy maintenance. Its durable Aluzinc construction allows installation both indoors and outdoors. Manufactured in compliance with BS EN ISO 9001 standards and performance-tested to BS848 Part 1 & 2, this fan ensures dependable and energy-efficient ventilation for various commercial applications.