The Sentinel D‑Box Twin Fan 125mm (Stock Ref: SENT125T) is a commercial demand ventilation unit designed to provide reliable and energy-efficient airflow. It accommodates duct sizes from 100mm to 500mm, delivering airflow between 0.001 and 1.3 m³/s and pressures up to 650 Pa. Fitted with energy-saving EC/DC motors and a lockable isolator, the fan ensures efficient operation and safe maintenance. Its durable Aluzinc construction is suitable for both internal and external installations. Manufactured in compliance with BS EN ISO 9001 standards and performance-tested to BS848 Part 1 & 2, this fan is ideal for a wide range of commercial ventilation applications.