The Sentinel D‑Box Twin Fan 315mm (Stock Ref: SENT315T) is a high-efficiency commercial demand ventilation fan designed for reliable performance. Compatible with duct sizes from 100mm to 500mm, it provides airflow ranging from 0.001 to 1.3 m³/s and can handle pressures up to 650 Pa. Equipped with energy-efficient EC/DC motors and a lockable isolator, the fan ensures safe, controlled operation. Its robust Aluzinc construction supports installation both indoors and outdoors. Manufactured in accordance with BS EN ISO 9001 and tested to BS848 Part 1 & 2 standards, the Sentinel D‑Box Twin delivers consistent, energy-conscious ventilation for commercial applications.