The Sentinel D‑Box Twin Fan 200mm (Stock Ref: SENT200T) is a robust demand ventilation unit suitable for commercial installations. It supports duct sizes from 100mm to 500mm, providing airflow from 0.001 to 1.3 m³/s and pressure up to 650 Pa. The unit features energy-efficient EC/DC motors and a lockable isolator, allowing safe and simple operation. Constructed from durable Aluzinc, it is suitable for both indoor and outdoor mounting. Manufactured in accordance with BS EN ISO 9001 and tested to BS848 Part 1 & 2 standards, the fan delivers reliable and efficient ventilation for a variety of commercial applications.